Regulations. Boiler installations. Design standards Snip 35 76 change 7

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CHANGE N 1 SNiP II-35-76 "Boiler installations"

SNiP shall be supplemented with section 1a with the following content:

"1a. TERMS AND DEFINITIONS

Boiler room- a complex of buildings and structures, a building or premises with a boiler (heat generator) and auxiliary technological equipment designed to generate heat for heat supply purposes.

Central boiler room- a boiler room designed for several buildings and structures connected to the boiler room by external heating networks.

Autonomous (individual) boiler room- a boiler room designed to supply heat to one building or structure.

Roof boiler room- a boiler room located (placed) on the building’s roof directly or on a specially constructed base above the roof.”

Items 1.3, 1.5-1.8, 1.18-1.23 to read as follows.

"1.3. The design of new and reconstructed boiler houses must be carried out in accordance with approved heat supply schemes developed taking into account the construction of autonomous (individual) boiler houses.

In the absence of an approved heat supply scheme, the design of boiler houses is permitted on the basis of relevant feasibility studies (FS), agreed upon in the prescribed manner.

The type of fuel for boiler houses is determined in agreement with fuel-containing organizations in the prescribed manner. At the same time, the use of solid or liquid fuel for rooftop boiler houses is not allowed."

1.5. According to their placement on the general plan, boiler houses are divided into:

free-standing;

attached to buildings for other purposes;

built into buildings for other purposes, regardless of the floor of placement;

1.6. For production buildings of industrial enterprises, it is allowed to design attached, built-in and roof-top boiler rooms. For boiler houses attached to buildings for the specified purpose, the total thermal power of the installed boilers, the unit productivity of each boiler and the coolant parameters are not standardized. In this case, boiler rooms should be located near walls, where the horizontal distance from the boiler room wall to the nearest opening should be at least 2 m, and the vertical distance from the boiler room ceiling to the nearest opening should be at least 8 m.

For boiler rooms built into production buildings of industrial enterprises, when using boilers with a steam pressure of up to 0.07 MPa (1.7 kgf/cm 2) and a water temperature of up to 115 ° C, the thermal power of the boilers is not standardized.

The thermal power of boilers with a steam pressure of more than 0.07 MPa (1.7 kgf/cm 2) and a water temperature of more than 115 ° C should not exceed the values ​​​​established by the Rules for the design and safe operation of steam and hot water boilers, approved by the State Technical Supervision Authority of Russia.

Roof-top boiler houses for production buildings of industrial enterprises, when used, can be designed using boilers with a steam pressure of up to 0.07 MPa (1.7 kgf/cm 2) and water temperature up to 115 ° C. At the same time, the thermal power of such a boiler house should not exceed the need in the warmth of knowledge, for the heat supply of which it is intended, but not more than 5 MW.

It is not allowed to place roof-mounted and built-in boiler rooms above industrial premises and warehouses of categories A and B due to explosion and fire hazard.

1.7. The placement of boiler rooms built into multi-apartment residential buildings is not permitted.

For residential buildings, it is allowed to install attached and roof-mounted boiler rooms. The indicated boiler houses can be designed using hot water boilers with water temperatures up to 115° C.

The thermal power of the boiler house should not exceed the heat demand of the knowledge for which it is intended to supply heat, and the thermal power of the roof boiler house should not exceed 3.0 MW.

It is not allowed to design attached boiler rooms directly adjacent to residential buildings from the entrance entrances, and sections of walls with window openings, where the horizontal distance from the external wall of the boiler room to the nearest window of the residential premises is less than 4 m, and the horizontal distance from the ceiling of the boiler room to the nearest window of the residential premises less than 8 m vertically.

It is not allowed to place roof boiler rooms directly on the ceilings of residential premises (the ceiling of a residential premises cannot serve as the basis for the floor of the boiler room), as well as adjacent to residential premises.

1.8. For public, administrative and domestic buildings, it is allowed to design built-in, attached and roof-top boiler rooms when using:

hot water boilers with water heating temperatures up to 115°C.

steam boilers with saturated steam pressure up to 0.07 MPa, satisfying the condition

(T -100) · V £ 100 for each boiler.

t - temperature of saturated steam at design pressure, °C;

V - water volume of the boiler, m 3;

At the same time, in boiler rooms located in the basement, it is not allowed to install boilers designed to operate on gaseous and liquid fuels with a vapor flash point below 45°C.

The total thermal power of an individual boiler room should not exceed the heat demand of the building or structure for which it is intended to supply heat; in addition, the thermal power should not exceed:

3.0 MW - for a roof-top boiler house and for a built-in boiler house with liquid and gaseous fuel boilers;

1.5 MW - for a built-in boiler room with solid fuel boilers.

The total thermal power of attached boiler rooms is not limited.

It is not allowed to place attached boiler rooms on the side of the main façade of buildings. The distance from the wall of the boiler room building to the nearest window must be at least 4 m horizontally, and from the boiler room covering to the nearest window at least 8 m vertically. Such boiler rooms are also not allowed to be placed adjacent to, under or above rooms with more than 50 people staying in them at the same time.

It is not allowed to design roof-mounted, built-in and attached boiler houses to buildings of preschool and school institutions, to medical and dormitory buildings of hospitals, clinics, sanatoriums and recreational facilities.

1.18. Boiler house designs should include:

boilers, economizers, air heaters, ash collectors and other equipment in modular transportable design with increased factory readiness;

enlarged installation blocks of pipelines and gas-air pipelines;

consolidation of groups of technologically interconnected auxiliary equipment by assembling it into transportable assembly blocks with pipelines and fittings.

For built-in, attached and roof-top boiler rooms, automated boilers should be provided in full factory readiness.

1.19. Outside boiler houses, in open areas, it is allowed to place draft machines, ash collectors, deaerators, decarbonizers, clarifiers, tanks for various purposes, fuel oil heaters; At the same time, measures should be taken to ensure reliable and safe operation, protection against freezing of pipelines and fittings, as well as measures to protect the environment from pollution and protection from noise.

The possibility of installing a roof boiler room on buildings of any purpose above the level of 26.5 m must be agreed with the territorial bodies of the State Fire Service of the Ministry of Internal Affairs of Russia.

1.20. The technological diagram and layout of the boiler room equipment must ensure:

optimal mechanization and automation of technological processes, safe and convenient maintenance of equipment;

installation of equipment in turns;

shortest length of communication;

optimal conditions for mechanization of repair work;

the possibility of entry into the boiler room of outdoor vehicles (forklifts, electric vehicles) for transporting equipment units and pipelines during repair work.

Automation of technological processes of individual boiler houses should ensure safe operation without permanent maintenance personnel.

For repair of equipment components. fittings and pipelines weighing more than 50 kg should, as a rule, be provided with inventory lifting devices (electric trucks, truck cranes).

If it is impossible to service equipment using inventory devices, it is allowed to provide stationary lifting mechanisms (hoists, hoists, overhead and overhead cranes) for these purposes. The project does not provide for stationary lifting devices, which are necessary when performing only installation work.

To ensure the repair of equipment installed in open areas, as a rule, ground-mounted trackless cranes should be provided.

1.21. In boiler houses, it is necessary to provide repair areas or premises for carrying out routine repairs of equipment, fittings, control and regulation devices. In this case, one should take into account the possibility of carrying out work on routine repairs of the specified equipment by industrial enterprises or regional specialized organizations.

Repair areas are not provided in autonomous boiler houses. Repair of equipment, fittings, control and regulation devices in such boiler houses should be carried out only by specialized organizations that have the appropriate licenses, using their bases and inventory devices.

1.22. The placement of boilers and auxiliary equipment and boiler rooms (the distance between boilers and building structures, the width of passages), as well as the arrangement of platforms and stairs for servicing equipment, depending on the parameters of the coolant, should be provided in accordance with the rules for the design and safe operation of steam and hot water boilers, approved by Gosgortekhnadzor Russia, rules for the design and safe operation of steam boilers with a steam pressure of no more than 0.07 MPa (1.7 kgf/cm2), hot water boilers and water heaters with a water heating temperature not higher than 338 K (115°C), approved by the Ministry of Construction of Russia, as well as in accordance with passports and boiler operating instructions.

For autonomous automated boiler houses operating without permanent maintenance personnel, the dimensions of passages are taken in accordance with passports and operating instructions to ensure free access during maintenance, installation and dismantling of equipment.

1.23. Categories of production according to explosion, explosion and fire hazards and the degree of fire resistance of buildings (premises) in boiler house structures should be taken in accordance with App. 1 to these norms and rules, as well as in accordance with Fire Safety Standards NPB 105 - 95."

Paragraph 2.4.

"2.4. The boiler house site should include the main building, fuel and ash removal facilities, a transformer substation, a gas control point (GRP), a condensate collection and pumping station, hot water storage tanks, a water treatment and reagent building.

The specified buildings and structures may be combined in compliance with the requirements of Section 11 of these rules and regulations. The capacity of liquid fuel warehouses should not exceed the values ​​​​established by building codes and rules for the design of oil and petroleum products warehouses for warehouses of the second group.

For built-in and attached individual boiler rooms, closed storage warehouses for solid and liquid fuels should be provided, located outside the boiler room and the building for which it is intended to supply heat, in accordance with SNiP 2.07.01-89.

The capacity of liquid fuel warehouses should not exceed the values ​​​​established by building codes and rules for the design of oil and petroleum products warehouses for warehouses of the second group.

The fencing of boiler rooms should be designed in accordance with the Guidelines for the design of fencing of sites and areas of enterprises, buildings and structures.

Buildings and fences of boiler houses located on the sites of industrial enterprises are not allowed to be fenced.

Items 3.1, 3.9, 3.10, 3.15, 3.16, 3.29 to read as follows:

"3.1. When designing buildings and structures of boiler houses, one should be guided by building codes and rules for the design of industrial buildings,

administrative and domestic buildings, structures of industrial enterprises and the instructions of this section.

When designing built-in, attached and roof-top boiler rooms, one should additionally be guided by the requirements of the building codes and regulations of those buildings and structures for which they are intended to supply heat.

3.9. Built-in boiler rooms must be separated from adjacent rooms by type 2 fire walls or type 1 fire partitions and type 3 fire ceilings. Attached boiler rooms must be separated from the main building by a type 2 fire wall. In this case, the wall of the building to which the boiler room is attached must have a fire resistance limit of at least 0.75 hours, and the ceiling of the boiler room must be made of non-combustible materials.

The load-bearing and enclosing structures of roof boiler houses must have a fire resistance limit of 0.75 hours, the limit of flame propagation throughout the structure is equal to zero, and the roof covering of the main building under the boiler room and at a distance of 2 m from its walls must be made of non-combustible materials or protected from fire with a concrete screed thickness of at least 20 mm.

The resistance to air and vapor permeation of walls and ceilings separating built-in and attached boiler rooms from other rooms, as well as building coverings when placing boiler rooms on roofs, must comply with the requirements of SNiP II-3-79 “Building Heat Engineering”.

The internal surfaces of the walls of built-in and roof boiler rooms must be painted with moisture-resistant paints.

3.10. Exits from built-in and attached boiler rooms should be provided directly to the outside.

Flights of stairs for built-in boiler rooms may be located within the dimensions of common staircases, separating these flights from the rest of the staircase with fireproof partitions and ceilings with a fire resistance limit of at least 0.75 hours .

For roof boiler rooms the following should be provided:

exit from the boiler room directly to the roof;

exit to the roof from the main building via a flight of stairs;

if the roof slope is more than 10%, walking bridges 1 m wide should be provided, with railings from the exit to the roof to the boiler room and along the perimeter of the boiler room.

The structures of bridges and railings should be made of non-combustible materials.

3.15. Permissible sound pressure levels and sound levels at permanent workplaces and at control panels should be taken in accordance with the Sanitary Standards for the Design of Industrial Enterprises.

Autonomous boiler houses must provide a sound pressure level in accordance with the requirements of SNiP II-12-77 of those buildings and structures for which they are intended to supply heat.

3.16. External enclosing structures of the ground part of the fuel supply for fuel with a release of volatile substances into the combustible mass of 20% or more (unloading devices, crushing compartments, conveyor galleries, transfer units, above-bunker galleries) should be designed based on the fact that the area of ​​easily resettable structures should be at least 0. 03 m2 per 1 m2 of room volume. Window sashes in buildings and fuel supply rooms should be single and located, as a rule, in the same plane with the inner surface of the walls.

In individual boiler houses operating on liquid and gaseous fuels, easily removable enclosing structures should be provided at the rate of 0.03 m 2 per 1 m 2 of the volume of the room in which the boilers are located.

3.29. Technological equipment with static and dynamic loads that do not cause stresses in the underlying concrete layer of the floor that exceed the stress from the influence of installation and transport loads should be installed without foundations.

For built-in and roof-top boiler houses, technological equipment must be provided, the static and dynamic loads of which allow it to be installed without foundations. At the same time, the static and dynamic loads from the roof boiler room equipment on the building floor should not exceed the bearing capacity of the building structures used.

Chapter 4 republish in a new edition:

" 4 "FUEL"

4.1. Types of main, reserve and emergency fuel, as well as the need for reserve or emergency fuel for boiler houses, are established taking into account the category of the boiler house, based on local operating conditions, in agreement with fuel supply organizations.

4.2. The type of fuel for kindling and “lighting” boilers with chamber fireboxes for burning solid fuels should be provided based on the requirements of the manufacturer.”

Other points are excluded.

Paragraph 6.4. to read as follows:

"6.4. Air heaters, surface and contact economizers, as well as heat exchangers that use the latent heat of vaporization of flue gases should be used as “tail” heating surfaces.

Surface economizers and air heaters and heat exchangers for latent heat of vaporization are accepted as part of the factory configuration of boiler units.

Contact water economizers can be used to heat water in domestic and process hot water supply systems, baths and laundries. The use of heat obtained in contact economizers for domestic hot water supply is permitted in the presence of intermediate heat exchangers.

Heating of water for baths and laundries can be done in contact economizers. the use of which is authorized by the USSR Ministry of Health.

Contact economizers can be installed directly behind boilers or after surface economizers."

Items 7.6, 7.14, 7.15, 7.18 to read as follows:

"7.6. The design of the gas-air duct of boiler houses is carried out in accordance with the standard method of aerodynamic calculation of boiler installations of the TsKTI im. I. I. Polzunova.

For built-in, attached and roof-mounted boiler rooms, openings should be provided in the walls for supplying combustion air, located, as a rule, in the upper zone of the room.

The dimensions of the open cross-section of openings are determined based on ensuring the air speed in them is no more than 1 m/s.

7.14. The height of chimneys with artificial draft is determined in accordance with the Guidelines for calculating the dispersion of harmful substances in the atmosphere contained in emissions from enterprises and the Sanitary Standards for the Design of Industrial Enterprises.

The height of chimneys with natural draft is determined based on the results of an aerodynamic calculation of the gas-air path and is checked according to the conditions for the dispersion of harmful substances in the atmosphere.

When calculating the dispersion of harmful substances in the atmosphere, the maximum permissible concentrations of ash, sulfur oxides, nitrogen dioxide and carbon monoxide should be taken. In this case, the amount of harmful emissions released is, as a rule, taken according to data from boiler manufacturers; in the absence of this data, it is determined by calculation.

The height of the mouth of chimneys for built-in, attached and roof-top boiler rooms must be higher than the wind pressure limit, but not less than 0.5 m above the roof, and also not less than 2 m above the roof of the higher part of the building or the tallest building within a radius of 10 m.

7.15. The diameters of the outlet openings of steel chimneys are determined from the condition of optimal gas velocities based on technical and economic calculations.

The diameters of the outlet openings of brick and reinforced concrete pipes are determined based on the requirements of clause 7.16 of these rules and regulations.

7.18. For boiler houses operating on gaseous fuel, the use of steel chimneys is allowed if it is not economically feasible to increase the temperature of the flue gases.

For autonomous boiler houses, chimneys must be gas-tight and made of metal or non-combustible materials.

Pipes must, as a rule, have external thermal insulation to prevent the formation of condensation and hatches for inspection and cleaning.

Paragraph 8.17 to read as follows:

"8.17. In autonomous boiler houses, if it is necessary to maintain a constant water temperature at the inlet to the boiler, a recirculation pipeline should be provided."

Clauses 9.18, 9.24 to read as follows:

"9.18. The performance of water heating installations is determined by the maximum hourly heat consumption for heating and ventilation and the calculated heat consumption for hot water supply, determined in accordance with building codes in the rules for the design of hot water supply.

The performance of heaters for hot water supply in individual boiler rooms is determined by the maximum flow rate.

9.24. Condensate from steam-water heaters of boiler rooms should be sent directly to deaerators.

In boiler rooms, closed tanks with a steam cushion should be provided to collect drainage from steam lines, condensate from steam-water heaters and heaters of the heating and ventilation system of the boiler room.

When condensate collection tanks are located in or near the boiler room, all drainage should be directed to these tanks. At the same time, special drainage collection tanks are not provided in the boiler room.

Depending on the quality of the condensate. returned from external consumers, it should be possible to directly supply it to deaerators for joint processing with source water or processing in a special installation.

Condensate from heat recovery heat exchangers for latent heat of flue gas vaporization can be used in the boiler feed system after special treatment or discharged into the sewer system after a neutralization installation."

Items 10.1, 10.7, 10.27 to read as follows:

"10.1. The water treatment design must include solutions for water treatment to feed steam boilers, heating and hot water supply systems, as well as for monitoring the quality of water and steam.

For autonomous boiler houses, it is allowed not to provide a water treatment installation if the initial and emergency filling of the circulation circuits of the boilers and heating system with chemically treated water or clean condensate is ensured.

In this case, a filling device must be provided in the boiler room

10.7. Water quality standards for filling and replenishing heating networks, heating systems and circulation circuits of hot water boilers must meet the requirements of the codes and regulations for the design of heating networks, as well as the requirements of manufacturers' instructions for

operation of hot water boilers."

10.27. The design capacity of the water treatment plant is determined by:

for feeding steam boilers - the sum of the maximum losses of steam and condensate by process consumers, losses of water with continuous blowing and losses of steam and condensate in the boiler room;

for feeding heating networks - in accordance with building codes and rules for the design of heating networks.

for autonomous boiler houses - based on the initial or emergency filling of all circulation volumes within no more than 8 hours.

Items 11.39, 11.42, 11.49, 11.52, 11.53, 11.59, 11.60 to read as follows:

"11.39. At least two tanks must be provided for storing main and reserve fuel. One tank may be installed to store emergency fuel.

The total capacity of tanks for storing liquid additives is determined by the conditions of their delivery (the capacity of railway or road tanks), but must be at least 0.5% of the capacity of the fuel oil storage facility. The number of tanks is accepted to be at least two.

For built-in and attached individual liquid fuel boiler houses, a fuel storage facility should be provided, located outside the boiler room and heated buildings, with a capacity calculated based on storage conditions of at least 5 daily fuel consumption determined for the mode corresponding to the boiler room heat load in the coldest month mode, quantity reservoirs is not limited."

11.42. To heat fuel in railway tanks, steam at a pressure of 6-10 kgf/cm 2 should be used. To heat fuel oil in heaters, fuel storage tanks, receiving tanks and drain trays, steam with a pressure of 6-10 kgf/cm2 or high-temperature water with a temperature of at least 120 0 C can be used.

For liquid fuel in built-in and attached boiler houses, if it is necessary to heat it in external containers, the coolant of the same boiler houses is used.

11.49. In boiler rooms (but not above boilers or economizers) of free-standing boiler rooms, it is allowed to install closed liquid fuel supply tanks with a capacity of no more than 5 m 3 for fuel oil and 1 m 3 for light oil fuel.

For built-in and attached individual boiler rooms, the total capacity of the supply tanks installed in the boiler room should not exceed 0.8 m3.

When installing these tanks in boiler rooms, one should be guided by building codes and rules for the design of oil and petroleum products warehouses.

11.52. In boiler rooms intended. to operate only on liquid fuel, the fuel supply from fuel pumps to boilers must be provided through two lines for boiler houses of the first category and one line for boiler houses of the second category.

In cases where liquid fuel is used as a reserve, emergency or kindling fuel, its supply to the boilers is provided through single pipelines, regardless of the category of the boiler room.

The supply of coolant to the boiler house fuel supply installations is provided through one or two pipelines in accordance with the number of fuel supply lines to the boilers.

When supplying fuel and coolant through two lines, each line is designed to pass 75% of the fuel and coolant consumed at maximum load of working boilers.

For boiler houses operating on light oil fuel, the following should be provided on the fuel lines:

shut-off device with an insulating flange and a quick-acting shut-off valve with an electric drive at the fuel input into the boiler room;

shut-off valves on the outlet to each boiler or burner;

shut-off valves at the outlet to the drain line.

11.53. The laying of fuel lines should be above ground. Underground installation in non-passable channels with removable ceilings with minimal deepening of the channels without backfilling is allowed.

Where channels adjoin the outer wall of buildings, the channels must be filled with sand or have fireproof diaphragms.

Fuel pipelines must be laid with a slope of at least 0.003. It is prohibited to lay fuel lines directly through exhaust gases, air ducts and ventilation shafts."

11.59. For built-in, attached and roof-top boiler rooms, a natural gas supply with a pressure of up to 5 kPa should be provided. In this case, open sections of the gas pipeline must be laid along the outer wall of the building along a partition at least 1.5 m wide.

11.60. The following must be installed on the gas supply pipeline to the boiler room:

a disconnecting device with an insulating flange on the outer wall of the building at a height of no more than 1.8 m;

quick-acting shut-off valve with electric drive inside the boiler room;

shut-off valves on the outlet to each boiler or gas burner device."

Items 14.3, 14.6, 14.23 to read as follows:

14.3. The choice of electric motors, starting equipment, control devices, lamps and wiring should be made depending on the characteristics of buildings (premises) and structures according to environmental conditions, determined according to the appendix. 9 to these rules and regulations, taking into account the following additional requirements:

electric motors for exhaust fans installed in the premises of built-in attached and roof-top boiler rooms with boilers designed to operate on gaseous fuel and liquid fuel with a vapor flash point of 45 ° C and below must be of the design specified in the PUE for class B-1a premises.

The starting equipment for these fans, as a rule, should be installed outside the boiler room and be of a design that matches the characteristics of the environment. If it is necessary to install starting equipment in the boiler room, this equipment is accepted in the design provided for by the PUE for premises of class B-1a;

when water treatment equipment, pumping stations and gas control units are located in a common room with boiler units, the choice of electrical equipment is made according to the characteristics of the boiler room;

For fuel supply rooms equipped with a hydraulic cleaning system, the choice of design of electrical equipment, wiring and lamps is made taking into account the possibility of washing them with water.

14.6. To ensure safe operation and safety of equipment when boiler units are turned off, it is necessary to provide for blocking of electric motors of smoke exhausters, blower fans, and fuel supply mechanisms.

There is no provision for blocking the electric motors of boiler mechanisms with layered manual fireboxes.

In fuel supply, dust preparation and ash and slag removal systems, mechanisms should be interlocked to ensure that electric motors are turned on and off in a certain sequence, preventing individual mechanisms from becoming blocked by fuel, ash or slag.

Fuel supply and dust preparation mechanisms must be interlocked with fans of aspiration units.

In boiler rooms without constant personnel maintenance, operating on liquid and gaseous fuels, automatic closing of a quick-acting shut-off valve at the fuel input to the boiler room must be provided:

during a power outage;

when there is a signal of gas contamination in a gas-fired boiler room.

Such boiler rooms must be protected from unauthorized access inside.

14.23. In boiler rooms it is necessary to account for electricity consumption."

Items 15.6, 15.15, 15.17, 15.27 to read as follows:

"15.6. For water heating boilers when burning gaseous or liquid fuels, devices should be provided that automatically stop the fuel supply to the burners when:

a) increasing or decreasing the pressure of gaseous fuel in front of the burners;

b) reducing the pressure of liquid fuel in front of the burners, except for boilers equipped with rotary burners;

c) reducing the air pressure in front of the burners for boilers equipped with burners with forced air supply;

d) reducing the vacuum in the furnace;

e) the extinguishing of burner torches, the shutdown of which is not allowed during boiler operation:

f) increasing the temperature of water leaving the boiler;

g) increasing or decreasing the water pressure at the boiler outlet;

h) malfunctions of protection circuits, including loss of voltage, only for boiler houses of the second category.

Note. For boilers with a water temperature of 1150 C and below, when the water pressure behind the boiler decreases and the water flow through the boiler decreases, automatic shutdown of fuel supply to the burners is not provided.

15.15. In boiler houses operating without permanent maintenance personnel, the following signals (light and sound) must be sent to the control center:

equipment malfunction, while the reason for the call is recorded in the boiler room;

activation signal of the main high-speed shut-off valve of the boiler room fuel supply;

for boiler houses operating on gaseous fuel, when the gas content of the room reaches 10% of the lower flammability limit of natural gas.

15.17. Automatic control of combustion processes should be provided for boilers with chamber fireboxes for burning solid, gaseous and liquid fuels, as well as for boilers with layer mechanized fireboxes that allow automation of their operation.

Automatic control of boiler houses operating without permanent maintenance personnel should provide for automatic operation of the main and auxiliary equipment of the boiler house, depending on the specified operating parameters and taking into account the automation of heat-consuming installations. Starting boilers during an emergency shutdown should be done after troubleshooting manually.

Note. Automation of the heating process for the operation of boilers using emergency fuel is not provided.

15.27. The boiler room should provide for automatic maintenance of the specified temperature of the water entering the heating and hot water supply systems, as well as the specified temperature of the return water entering the boilers, if this is provided for in the manufacturer’s instructions.

For boiler houses with hot water boilers equipped with pushers not intended for automatic control of the combustion process, automatic control of water temperature may not be provided."

Paragraph 16.9 to read as follows:

16.9. For boiler rooms operating on gaseous fuel, in the presence of permanent maintenance personnel, at least three air exchanges per hour should be provided, excluding the air sucked into the furnaces of combustion boilers.

The design of exhaust fans installed in these boiler rooms must exclude the possibility of sparking.

Items 17.5, 17.22 to read as follows:

"17.5. The installation of fire hydrants should be provided in premises with production facilities of categories A, B and C, as well as in premises where liquid and gaseous fuel pipelines are laid.

A building with a height of more than 12 m, which is not equipped with an internal fire-fighting water supply system for supplying water for fire extinguishing, and has a roof boiler room, must be equipped with a “dry pipe” leading to the roof with fire hose heads with a diameter of 70 mm.

17.22. In built-in and roof boiler rooms, the floor must have waterproofing designed for a flood height of up to 10 cm.

Entrance doors must have thresholds to prevent water from entering outside the boiler room in the event of a pipeline failure and devices for removing it into the sewer."

Items 18.25 to read as follows:

"18.25. The calculated seismicity of buildings and structures of boiler houses is taken in accordance with the calculated seismicity of buildings and structures for the heat supply of which boiler houses are designed.

The load-bearing capacity of the structures of the main building and structure with built-in and roof-mounted boiler rooms must be calculated taking into account additional loads from the main and auxiliary equipment of the boiler room in accordance with SNiP II-7-81.

The fastening of main and auxiliary equipment to the load-bearing and enclosing structures of the premises of such boiler houses must also be carried out in accordance with the specified SNiP."

Re-visited zdiysnene

for stagnation on the territory of Ukraine

Subject to the order of the Ministry of Health of Ukraine

dated March 22, 2006 No. 74

From the instructions of official changes and additional

BUILDING REGULATIONS

DESIGN STANDARDS

Boiler installations

The revised arrangement for stagnation on the territory of Ukraine is subject to the order of the Ministry of Health of Ukraine No. 74 dated March 22, 2006. From the faith:

Changes introduced by the Resolution of the State Duma of the SRSR No. 140 dated 09/08/77, dated 01/01/78;

Changes introduced by the Resolution of the State Duma of the SRSR No. 3 dated 01/11/85, dated 01/01/90;

Additional, decorous 01.10.94 r. only on the territory of Ukraine (order of the State Committee for the Future of Ukraine No. 35 dated September 20, 1994);

• change No. 1, dated 01/01/99 only on the territory of Ukraine (order to the State Duma of Ukraine No. 285 dated April 14, 1998);
• change No. 2, dated December 1, 2003 only on the territory of Ukraine (order to the State Duma of Ukraine No. 175 dated 10/20/03);

Change No. 3, dated July 1, 2006. only on the territory of Ukraine (order to the Ministry of Health of Ukraine No. 74 dated March 22, 2006).

Updating of the normative document was submitted to the Technical Committee for Standardization "Business Materials" of the Ministry of Justice of Ukraine.

State Committee

Council of Ministers of the USSR

for construction affairs

(Gosstroy USSR)

Building regulations

Boiler installations

SNiP P-35-76

SNiP P-G.9-65, SN 350-66

1. GENERAL INSTRUCTIONS

1.1. These norms and rules must be observed when designing new and reconstructed boiler installations (boiler houses) with steam, water-heating and steam-water-heating boilers, regardless of productivity, with a steam compression of no more than 10 kgf/cm2* and with a water temperature of no more than 200 °C.

Note. These rules and regulations do not apply to the design of boiler houses of thermal power plants, mobile boiler houses, boiler houses with electrode boilers, waste heat boilers, boilers with high-temperature organic coolants (HOT) and other specialized types of boilers for technological purposes, boiler houses for apartment heating systems.

1. When designing boiler houses with boilers subordinate to the USSR State Gortekhnadzor (with a steam pressure of more than 1.7 kgf/cm2 and a water temperature of more than 115 °C), in addition to these standards, it is necessary to comply, in particular, with the safety rules approved by the Gosgortekhnadzor THE USSR.
2. The design of new and reconstructed boiler houses must be carried out in accordance with approved heat supply schemes.

In the absence of an approved heat supply scheme, the design of boiler houses is permitted on the basis of relevant feasibility studies (FS), agreed upon in the prescribed manner.

(Changed edition. Amendment No. 2)

1.4. Boiler houses are divided into:

heating - to provide heat to heating, ventilation and hot water supply systems;

heating and industrial - to provide heat for heating, ventilation, hot water supply and process heat supply systems;

production - for process heat supply.

1.5. Boiler houses according to their location on the general plan are divided into:

free-standing;

attached to buildings for other purposes; built into buildings for other purposes, regardless of the floor of placement.

1.6. For boiler houses attached to production buildings of industrial enterprises, the overall productivity of the installed boilers, as well as the productivity of each boiler and coolant parameters are not standardized.

For boiler rooms built into production buildings of industrial enterprises, when using boilers with steam pressure up to 1.7 kgf/cm2 and water temperature up to 115 °C, boiler performance is not standardized. The productivity of boilers with a steam pressure of more than 1.7 kgf/cm2 and a water temperature of more than 115 °C should not exceed the values ​​​​established by the Rules for the design and safe operation of steam and water-heating boilers, approved by the USSR State Mining and Technical Supervision.

1.7. For residential buildings, it is allowed to design attached boiler houses operating on natural gas.

It is allowed to design boiler houses ("rooftop"), operating on natural gas, located on flat roofs and in attics of industrial, residential and public buildings and structures up to 30 m in height, inclusive, as well as designing the reconstruction of existing boiler houses, operating on natural gas, located in basements and ground floors of these buildings, providing justification for the inability to close them.

The design of the above boiler houses is allowed when using water heating boilers with a water heating temperature of up to 115 ° C, without drums, with a heating capacity

SNiP P-35-76

each no more than 1.25 MW (1 Gcal/h). The total heat output of installed boilers should not exceed 3.75 MW (3.2 Gcal/h).

(Changed edition. Addition, amendment No. 1, amendment No. 3)

1.8. Boiler houses attached to public buildings and structures and to auxiliary buildings of industrial enterprises, as well as boiler houses built into buildings for the specified purpose, are allowed to be designed when using boilers with a steam pressure of up to 1.7 kgf/cm2 and a water temperature of up to 115 °C. At the same time, in built-in boiler rooms it is not allowed to provide boilers designed to operate with liquid fuel with a vapor flash point below 45 °C.

In built-in boiler houses, it is allowed to provide water-heating boilers designed to operate on natural gas, without drums, with a heating capacity of no more than 1.25 MW (1 Gcal/h) each.

The total productivity of boilers installed in built-in boiler rooms should not exceed:

a) when boilers operate on liquid fuel -3 Gcal/h; when boilers operate on natural gas -3.75 MW (3.2 Gcal/h);

b) when operating boilers using solid fuel:

with reduced sulfur content up to 0.5% and reduced ash content up to 2.5% - 1.5 Gcal/h;

with reduced sulfur content up to 1% and reduced ash content up to 5% - 0.5 Gcal/h.

The overall performance of boilers installed in attached boiler rooms is not limited.

The design of boiler houses attached to the buildings of kindergartens, secondary schools, hospitals and clinics, sanatoriums, recreation institutions, pioneer camps, as well as boiler houses built into buildings for the specified purpose, is not allowed.

1.9. The design of boiler houses attached to warehouses for combustible materials, flammable and combustible liquids is not allowed, with the exception of fuel warehouses for boiler houses (clause 11.51 of these rules and regulations).

1.10. It is not allowed to place built-in boiler rooms under public premises (foyers and auditoriums, commercial premises of stores, classrooms and auditoriums of educational institutions, canteens, restaurants, dressing rooms and soap baths, showers, etc.) and under warehouses for combustible materials

fishing, and roof boiler rooms - directly above the specified premises, waiting rooms, group rooms of kindergartens and premises with explosive zones, as well as premises of categories A and B for explosion, explosion and fire hazard.

(Changed edition. Amendment No. 1)

1.11. Heat consumers in terms of heat supply reliability include:

the first category includes consumers whose heat supply disruption is associated with a danger to human life or significant damage to the national economy (damage to technological equipment, mass defects of products);

Lists of heat consumers of the first category are approved by the Union and Union-Republican ministries and departments in agreement with the USSR State Planning Committee and the USSR State Construction Committee.

1.12. Boiler houses in terms of reliability of heat supply to consumers include:

to the first category - boiler houses, which are the only source of heat for the heating supply system and provide consumers of the first category who do not have individual backup heat sources;

1.13. Thermal loads for calculating and selecting boiler room equipment must be determined for three characteristic modes:

maximum winter - at average outside air temperature during the coldest five-day period;

the coldest month - at the average outside air temperature in the coldest month;

summer - at the design temperature of the outside air of the warm period (calculation parameters A).

The indicated average and design outdoor air temperatures are taken in accordance with building codes for building climatology and geophysics and for the design of heating, ventilation and air conditioning.

1. For heat supply to buildings and structures that have standby heating or the operation of heating systems where interruptions are allowed, it should be possible to operate the boiler room equipment under these conditions.
2. The estimated productivity of the boiler room is determined by the sum of the hourly heat consumption

SNiP Y-35-76

for heating and ventilation under maximum winter conditions, estimated heat consumption for hot water supply, determined in accordance with building codes and rules for the design of hot water supply, and estimated heat consumption for technological purposes. When determining the design productivity of the boiler house, heat consumption for the boiler house’s own needs and heat losses in the boiler house and in heating networks must also be taken into account.

Note. Estimated heat consumption for technological purposes should be taken taking into account the possibility of discrepancies in the maximum heat consumption of individual consumers.

1.16. The number and unit productivity of boiler units installed in the boiler room should be selected according to the design productivity of the boiler room, checking the operating mode of the boiler units for the warm period of the year; in this case, in the event of failure of the largest boiler in terms of productivity in boiler houses of the first category, the remaining ones must provide heat supply to consumers of the first category categories:

for process heat supply and ventilation systems - in an amount determined by the minimum permissible loads (regardless of the outside air temperature);

for heating and hot water supply - in an amount determined by the regime of the coldest month.

In the event of failure of one boiler, regardless of the category of the boiler room, the amount of heat supplied to consumers of the second category is not standardized.

The maximum number of boilers installed in a boiler room is determined on the basis of technical and economic calculations.

Boiler rooms must provide for the installation of at least two boilers, with the exception of industrial boiler rooms of the second category, in which the installation of one boiler is allowed.

1. In boiler house projects, factory and standard layouts of boiler units and auxiliary equipment should be adopted.
2. Boiler house designs should include:

boilers, economizers, air heaters, ash collectors and other equipment in modular transportable design with increased factory readiness;

enlarged installation blocks of pipelines and gas-air pipelines;

consolidation of groups of technologically interconnected auxiliary equipment

by assembling it into transportable mounting blocks with pipelines and fittings.

1.19. Outside boiler houses, in open areas, it is allowed to place draft machines, ash collectors, deaerators, decarbonizers, clarifiers, tanks for various purposes, fuel oil heaters; At the same time, measures should be taken to ensure reliable and safe operation, protection against freezing of pipelines and fittings, as well as measures to protect the environment from pollution.

For climatic regions with an average temperature of the coldest five-day period below minus 30 ° C and for areas of dust storms, open installation of draft machines may be provided if this is permitted by the technical specifications or operating instructions of the manufacturers.

1.20. The technological diagram and layout of the boiler room equipment must provide:

optimal mechanization and automation of technological processes, safe and convenient maintenance of equipment;

installation of equipment in turns;

shortest length of communications;

optimal conditions for mechanization of repair work;

the possibility of entry into the boiler room of outdoor vehicles (forklifts, electric vehicles) for transporting equipment units and pipelines during repair work.

To repair equipment components, fittings and pipelines weighing more than 50 kg, as a rule, inventory lifting devices (electric vehicles, truck cranes) should be provided.

If it is impossible to service equipment using inventory devices, it is allowed to provide stationary lifting mechanisms (hoists, hoists, overhead and overhead cranes) for these purposes. The project does not provide for stationary lifting devices, which are necessary when performing only installation work.

To ensure the repair of equipment installed in open areas, as a rule, ground-mounted trackless cranes should be provided.

SNiP shall be supplemented with section 1a with the following content:

"1a. TERMS AND DEFINITIONS

Boiler room- a complex of buildings and structures, a building or premises with a boiler (heat generator) and auxiliary technological equipment designed to generate heat for heat supply purposes.

Central boiler room- a boiler room designed for several buildings and structures connected to the boiler room by external heating networks.

Autonomous (individual) boiler room- a boiler room designed to supply heat to one building or structure.

Roof boiler room- a boiler room located (placed) on the building’s roof directly or on a specially constructed base above the roof.”

Items 1.3, 1.5-1.8, 1.18-1.23 to read as follows.

"1.3. The design of new and reconstructed boiler houses must be carried out in accordance with approved heat supply schemes developed taking into account the construction of autonomous (individual) boiler houses.

In the absence of an approved heat supply scheme, the design of boiler houses is permitted on the basis of relevant feasibility studies (FS), agreed upon in the prescribed manner.

The type of fuel for boiler houses is determined in agreement with fuel-containing organizations in the prescribed manner. At the same time, the use of solid or liquid fuel for rooftop boiler houses is not allowed."

1.5. According to their placement on the general plan, boiler houses are divided into:

free-standing;

attached to buildings for other purposes;

built into buildings for other purposes, regardless of the floor of placement;

1.6. For production buildings of industrial enterprises, it is allowed to design attached, built-in and roof-top boiler rooms. For boiler houses attached to buildings for the specified purpose, the total thermal power of the installed boilers, the unit productivity of each boiler and the coolant parameters are not standardized. In this case, boiler rooms should be located near walls, where the horizontal distance from the boiler room wall to the nearest opening should be at least 2 m, and the vertical distance from the boiler room ceiling to the nearest opening should be at least 8 m.

For boiler rooms built into production buildings of industrial enterprises, when using boilers with a steam pressure of up to 0.07 MPa (1.7 kgf/cm 2) and a water temperature of up to 115°, the heating power of the boilers is not standardized.

The thermal power of boilers with a steam pressure of more than 0.07 MPa (1.7 kgf/cm 2) and a water temperature of more than 115 ° C should not exceed the values ​​​​established by the Rules for the design and safe operation of steam and hot water boilers, approved by the State Technical Supervision Authority of Russia.

Roof-top boiler houses for production buildings of industrial enterprises, when used, can be designed using boilers with a steam pressure of up to 0.07 MPa (1.7 kgf/cm 2) and a water temperature of up to 115 ° C. At the same time, the thermal power of such a boiler house should not exceed the need in the warmth of knowledge, for the heat supply of which it is intended, but not more than 5 MW.

It is not allowed to place roof-mounted and built-in boiler rooms above industrial premises and warehouses of categories A and B due to explosion and fire hazard.

1.7. The placement of boiler rooms built into multi-apartment residential buildings is not permitted.

For residential buildings, it is allowed to install attached and roof-mounted boiler rooms. These boiler rooms can be designed using hot water boilers with water temperatures up to 115° C.

The thermal power of the boiler house should not exceed the heat demand of the knowledge for which it is intended to supply heat, and the thermal power of the roof boiler house should not exceed 3.0 MW.

It is not allowed to design attached boiler rooms directly adjacent to residential buildings from the entrance entrances, and sections of walls with window openings, where the horizontal distance from the external wall of the boiler room to the nearest residential window is less than 4 m, and the horizontal distance from the boiler room ceiling to the nearest residential window is less than 8 m vertically.

It is not allowed to place roof boiler rooms directly on the ceilings of residential premises (the ceiling of a residential premises cannot serve as the basis for the floor of the boiler room), as well as adjacent to residential premises.

1.8. For public, administrative and domestic buildings, it is allowed to design built-in, attached and roof-top boiler rooms when using:

hot water boilers with water heating temperatures up to 115°C.

steam boilers with saturated steam pressure up to 0.07 MPa, satisfying the condition

(T -100) · V £ 100 for each boiler.

t - temperature of saturated steam at design pressure, °C;

V - water volume of the boiler, m 3;

At the same time, in boiler rooms located in the basement, it is not allowed to install boilers designed to operate on gaseous and liquid fuels with a vapor flash point below 45°C.

The total thermal power of an individual boiler room should not exceed the heat demand of the building or structure for which it is intended to supply heat; in addition, the thermal power should not exceed:

3.0 MW - for a roof-top boiler house and for a built-in boiler house with liquid and gaseous fuel boilers;

1.5 MW - for a built-in boiler room with solid fuel boilers.

The total thermal power of attached boiler rooms is not limited.

It is not allowed to place attached boiler rooms on the side of the main façade of buildings. The distance from the wall of the boiler room building to the nearest window must be at least 4 m horizontally, and from the boiler room covering to the nearest window at least 8 m vertically. Such boiler rooms are also not allowed to be placed adjacent to, under or above rooms with more than 50 people staying in them at the same time.

It is not allowed to design roof-mounted, built-in and attached boiler houses to buildings of preschool and school institutions, to medical and dormitory buildings of hospitals, clinics, sanatoriums and recreational facilities.

1.18. Boiler house designs should include:

boilers, economizers, air heaters, ash collectors and other equipment in modular transportable design with increased factory readiness;

enlarged installation blocks of pipelines and gas-air pipelines;

consolidation of groups of technologically interconnected auxiliary equipment by assembling it into transportable assembly blocks with pipelines and fittings.

For built-in, attached and roof-top boiler rooms, automated boilers should be provided in full factory readiness.

1.19. Outside boiler houses, in open areas, it is allowed to place draft machines, ash collectors, deaerators, decarbonizers, clarifiers, tanks for various purposes, fuel oil heaters; At the same time, measures should be taken to ensure reliable and safe operation, protection against freezing of pipelines and fittings, as well as measures to protect the environment from pollution and noise protection.

The possibility of installing a roof boiler room on buildings of any purpose above the level of 26.5 m must be agreed with the territorial bodies of the State Fire Service of the Ministry of Internal Affairs of Russia.

1.20. The technological diagram and layout of the boiler room equipment must ensure:

optimal mechanization and automation of technological processes, safe and convenient maintenance of equipment;

installation of equipment in turns;

shortest length of communication;

optimal conditions for mechanization of repair work;

the possibility of entry into the boiler room of outdoor vehicles (forklifts, electric vehicles) for transporting equipment units and pipelines during repair work.

Automation of technological processes of individual boiler houses should ensure safe operation without permanent maintenance personnel.

For repair of equipment components. fittings and pipelines weighing more than 50 kg should, as a rule, be provided with inventory lifting devices (electric trucks, truck cranes).

If it is impossible to service equipment using inventory devices, it is allowed to provide stationary lifting mechanisms (hoists, hoists, overhead and overhead cranes) for these purposes. The project does not provide for stationary lifting devices, which are necessary when performing only installation work.

To ensure the repair of equipment installed in open areas, as a rule, ground-mounted trackless cranes should be provided.

1.21. In boiler houses, it is necessary to provide repair areas or premises for carrying out routine repairs of equipment, fittings, control and regulation devices. In this case, one should take into account the possibility of carrying out work on routine repairs of the specified equipment by industrial enterprises or regional specialized organizations.

Repair areas are not provided in autonomous boiler houses. Repair of equipment, fittings, control and regulation devices in such boiler houses should be carried out only by specialized organizations that have the appropriate licenses, using their bases and inventory devices.

1.22. The placement of boilers and auxiliary equipment and boiler rooms (the distance between boilers and building structures, the width of passages), as well as the arrangement of platforms and stairs for servicing equipment, depending on the parameters of the coolant, should be provided in accordance with the rules for the design and safe operation of steam and hot water boilers, approved by the Gosgortekhnadzor of Russia , rules for the design and safe operation of steam boilers with a steam pressure of no more than 0.07 MPa (1.7 kgf/cm 2), hot water boilers and water heaters with a water heating temperature not higher than 338 K (115 ° C), approved by the Ministry of Construction of Russia, as well as in accordance with the passports and boiler operating instructions.

For autonomous automated boiler houses operating without permanent maintenance personnel, the dimensions of the passages are taken in accordance with the passports and operating instructions to ensure free access during maintenance, installation and dismantling of equipment.

Categories of production according to explosion, explosion and fire hazards and the degree of fire resistance of buildings (premises) in boiler house structures should be taken in accordance with App. 1 to these norms and rules, as well as in accordance with Fire Safety Standards NPB 105 - 95."

Paragraph 2.4. to read as follows:

"2.4. The boiler house site should include the main building, fuel and ash removal facilities, a transformer substation, a gas control point (GRP), a condensate collection and pumping station, hot water storage tanks, a water treatment and reagent building.

The specified buildings and structures may be combined in compliance with the requirements of Section 11 of these rules and regulations. The capacity of liquid fuel warehouses should not exceed the values ​​​​established by building codes and rules for the design of oil and petroleum products warehouses for warehouses of the second group.

For built-in and attached individual boiler rooms, closed storage warehouses for solid and liquid fuels should be provided, located outside the boiler room and the building for which it is intended to supply heat, in accordance with SNiP 2.07.01-89.

The capacity of liquid fuel warehouses should not exceed the values ​​​​established by building codes and rules for the design of oil and petroleum products warehouses for warehouses of the second group.

The fencing of boiler rooms should be designed in accordance with the Guidelines for the design of fencing of sites and areas of enterprises, buildings and structures.

Buildings and fences of boiler houses located on the sites of industrial enterprises are not allowed to be fenced.

Items 3.1, 3.9, 3.10, 3.15, 3.16, 3.29 to read as follows:

"3.1. When designing buildings and structures of boiler houses, one should be guided by building codes and rules for the design of industrial buildings,

administrative and domestic buildings, structures of industrial enterprises and the instructions of this section.

When designing built-in, attached and roof-top boiler rooms, one should additionally be guided by the requirements of the building codes and regulations of those buildings and structures for which they are intended to supply heat.

3.9. Built-in boiler rooms must be separated from adjacent rooms by type 2 fire walls or type 1 fire partitions and type 3 fire ceilings. Attached boiler rooms must be separated from the main building by a type 2 fire wall. In this case, the wall of the building to which the boiler room is attached must have a fire resistance limit of at least 0.75 hours, and the ceiling of the boiler room must be made of non-combustible materials.

The load-bearing and enclosing structures of roof boiler houses must have a fire resistance limit of 0.75 hours, the limit of flame propagation throughout the structure is equal to zero, and the roof covering of the main building under the boiler room and at a distance of 2 m from its walls must be made of non-combustible materials or protected from fire with a concrete screed thickness of at least 20 mm.

The resistance to air and vapor permeation of walls and ceilings separating built-in and attached boiler rooms from other rooms, as well as building coverings when placing boiler rooms on roofs, must comply with the requirements of SNiP II-3-79 “Building Heat Engineering”.

The internal surfaces of the walls of built-in and roof boiler rooms must be painted with moisture-resistant paints.

3.10. Exits from built-in and attached boiler rooms should be provided directly to the outside.

Flights of stairs for built-in boiler rooms may be located within the dimensions of common staircases, separating these flights from the rest of the staircase with fireproof partitions and ceilings with a fire resistance limit of at least 0.75 hours .

For roof boiler rooms the following should be provided:

exit from the boiler room directly to the roof;

exit to the roof from the main building via a flight of stairs;

if the roof slope is more than 10%, walking bridges 1 m wide should be provided, with railings from the exit to the roof to the boiler room and along the perimeter of the boiler room.

The structures of bridges and railings should be made of non-combustible materials.

3.15. Permissible sound pressure levels and sound levels at permanent workplaces and at control panels should be taken in accordance with the Sanitary Standards for the Design of Industrial Enterprises.

Autonomous boiler houses must provide a sound pressure level in accordance with the requirements of SNiP II-12-77 of those buildings and structures for which they are intended to supply heat.

3.16. External enclosing structures of the ground part of the fuel supply for fuel with a release of volatile substances into the combustible mass of 20% or more (unloading devices, crushing compartments, conveyor galleries, transfer units, above-bunker galleries) should be designed based on the fact that the area of ​​easily resettable structures should be at least 0. 03 m2 per 1 m2 of room volume. Window sashes in buildings and fuel supply rooms should be single and located, as a rule, in the same plane with the inner surface of the walls.

In individual boiler houses operating on liquid and gaseous fuels, easily removable enclosing structures should be provided at the rate of 0.03 m 2 per 1 m 2 of the volume of the room in which the boilers are located.

3.29. Technological equipment subject to static and dynamic loads that do not cause stress in the underlying concrete layer of the floor that exceeds the stress from the influence of installation and transport loads should be installed without foundations.

For built-in and roof-top boiler houses, technological equipment must be provided, the static and dynamic loads of which allow it to be installed without foundations. At the same time, the static and dynamic loads from the roof boiler room equipment on the building floor should not exceed the bearing capacity of the building structures used.

Boiler installations. Design standards

UDC 697.32.001.2 (083.75)

Chapter SNiP II-35-76 "Boiler installations" was developed by the Santekhproekt Institute of the USSR State Construction Committee with the participation of the institutes VNIPIIenergoprom Ministry of Energy of the USSR, IKTI named after. I.I. Polzunov Ministry of Energy, Teploproekt of the USSR Ministry of Montazhspetsstroy, Krasnoyarsk PromstroyNIIproekt of the USSR Montazhstroy and Giprotechmontazh of the USSR Ministry of Montazhspetsstroy.

With the entry into force of this chapter of SNiP, chapter SNiP II-G.9-65 “Boiler installations. Design standards” and “Instructions for the design of boiler installations” (SN 350-66) become invalid.

EDITORS engineers Yu.B. Aleksandrovich, O.I. Kosov ( Gosstroy USSR), N.I. Shkolnik, M.D. Yazvin(Santechproekt).

Amendments were made 1978, No. 1 1998, approved by the Decree of the USSR State Construction Committee dated September 8, 1977 No. 140 and the Decree of the Russian State Construction Committee dated September 11, 1997 No. 18-52

With the entry into force of SNiP 2.04.14-88, Section. 13 et adj. 6-8 SNiP II-35-76 "Boiler installations"

Power supply and electrical devices

1. The electrical part of boiler house projects must be developed in accordance with the Rules for the Construction of Electrical Installations (PUE), building codes and rules for the production and acceptance of work on electrical devices, the Instructions for the design of power supply for industrial enterprises and this section.

2. Electrical receivers of boiler houses in terms of reliability of power supply belong to the first or second categories, determined in accordance with the PUE and clause 1.12 of these rules and regulations. In boiler houses of the second category with hot water boilers with a unit capacity of more than 10 Gcal/h, electric motors of network and make-up pumps are classified in the first category according to the power supply conditions.

3. The selection of electric motors, starting equipment, control devices, lamps and wiring should be made depending on the characteristics of buildings (premises) and structures according to environmental conditions, determined according to the appendix. 9 to these rules and regulations, taking into account the following additional requirements:

• electric motors for exhaust fans installed in the premises of built-in attached and roof-top boiler rooms with boilers designed to operate on gaseous fuel and liquid fuel with a vapor flash point of 45 ° C and below must be of the design specified in the PUE for class B-Ia premises. The starting equipment for these fans, as a rule, should be installed outside the boiler room and be of a design that matches the characteristics of the environment. If it is necessary to install starting equipment in the boiler room, this equipment is accepted in the design provided for by the PUE for premises of class B-Ia;
• when water treatment equipment, pumping stations and gas control units are located in a common room with boiler units, the choice of electrical equipment is made according to the characteristics of the boiler room;
• For fuel supply rooms equipped with a hydraulic cleaning system, the choice of design of electrical equipment, wiring and lamps is made taking into account the possibility of washing them with water.

Categories of production according to explosion, explosion and fire hazards and the degree of fire resistance and the degree of fire resistance of buildings (premises) and boiler house structures

Characteristics of buildings (premises) and construction of boiler houses according to environmental conditions