How to connect two aluminum pipes. How to connect aluminum pipes Connecting aluminum pipes

Soldering aluminum at home, technologies, methods

1. The simplest and in a reliable way, connect something or attach to aluminum or its alloys - this, of course, is a bolt and nut or rivet. All other methods require some training, fixtures, special solders, aluminum soldering fluxes, etc.

As practice shows, aluminum is not soldered at all in the usual way, with tin-lead solder, the reason for this is an oxide film, which forms almost instantly after cleaning the surface to be soldered.

2. Therefore, one of the ways to solder aluminum is - coating the surface, immediately after stripping, with a layer of molten rosin. Not the best, but after repeated attempts, rubbing the soldering point with a soldering iron tip, you can achieve satisfactory results.

3. Further, a solution of rosin in diethyl ether can be used to solder aluminum. We clean the surface and immediately lubricate it with such a flux, and then sprinkle it with copper filings, which serve as an abrasive to remove the oxide film, and tin the place of soldering with ordinary solder (tin-lead). After, solder to the tinned area copper wire or something else.

4. The next aluminum soldering technology is the use of special solder for aluminum soldering and flux. Most of these solders are low-temperature, but their melting point is higher than that of tin-lead, within 300-600 g. C. The key to success is also a good warm-up and for this they use a gas burner or a blowtorch.

High-temperature solders are used for soldering massive parts, they are used to repair and restore parts made of aluminum and its alloys of any complexity (cars, motorcycles, etc.). The soldering is very strong. In this way, tubes are soldered, for example, aluminum and copper, inserting one into the other and soldering around. But, when soldering aluminum with other metals, make sure that the solder and flux are designed for one and the other metal.

The surface is cleaned and covered with a special flux, as in previous cases, and when the solder melts, you can scrape the place of the solder with the tip of a knife from of stainless steel(or a stainless steel brush) to better remove the oxide film. Thus, we tin the aluminum surface and solder everything we need to it.

This does not end the ways of soldering aluminum at home. You can apply the electrochemical method.

5. We clean the surface and apply a few drops of CONCENTRATED solution to the place of soldering blue vitriol. Then, we take a power supply for 5-12V and a current of about 1 ampere (or more), we connect a resistance of 4-5 ohms and powerful to the power supply. 5-10 W, and our device is ready. We calculate the load in such a way that the PSU does not burn out during operation, i.e., approximately at a current of 1-5 Amperes.

Now we connect the aluminum blank to the negative pole of the power supply, and to the positive we attach a bare copper wire (you can twist it into a small flat spiral), which is then introduced into a drop of vitriol solution so that the end does not touch the surface of the part. Everything is ready, turn on the power supply and wait a few minutes. A layer of copper, as a result of electrolysis, will settle on the place for soldering. And then, wash off (but do not try to erase the copper), tin, and solder the wires or terminal. This method, of course, is not suitable for soldering some massive parts, but it is suitable for contact with wires.

6. Alternatively, instead of a solution of vitriol, you can use hydrochloric acid: drop it into the place of soldering and then drive the copper drive along the contact pad. Copper precipitation occurs faster than in the first case, but one must be careful with acid. And be sure to thoroughly rinse the place of soldering with water.

Connecting copper pipes: instructions and comparison of various installation technologies

So that the acid does not corrode the excess area, it can be sealed with tape or filled with paraffin, and the desired area should be exposed. That. you can solder aluminum with copper and other metals, and the contact pads will have a beautiful, neat shape.

That's all, and if there are any other ways to solder aluminum or additions to the above, write.

Viktor Donskoy
www.masteru.org.ua

To connect the tubes of air conditioners in apartments or offices, rolling is most often used. This method is simple, affordable and safe for equipment. But sometimes it is necessary to solder the air conditioner tubes.

In the presence of elementary technical knowledge you can replace or solder the copper pipe in the air conditioner yourself. Pipes are not included in the device package - they are bought in construction stores. A copper pipe with silver impurities is suitable, capable of withstanding temperature fluctuations that occur during the operation of climate systems, and not subject to corrosion. Pipe materials withstand high pressure and do not deform. Chemical composition allows you to save the surface layer for a long time, which allows the system to work without the need for repair.

Materials and equipment

Copper-phosphorus solders

The diameter of the pipe is selected based on the power of the device - the more powerful, the larger the diameter. The cost of a pipe is influenced by its technical characteristics, the brand of the manufacturer, and the characteristics of the metal. You should not save on pipes, as the service life and quality of the split system depends on it.

Soldering air conditioner pipes begins with the selection necessary tools and materials:

Pipe cutter. This tool will allow you to well prepare the end of the part, which will be connected with solder.
Pipe bender. To avoid creases and poor patency, you need to use a special tool so that the diameter does not change, and at the same time the pipe can be bent at an angle.
Metal soldering iron, gas burner.
Solder for soldering copper pipes conditioner.

The cleanliness of the surfaces is of great importance for the strength and tightness of the soldering. But the type of solder must be chosen correctly. Soldering is carried out with hard or soft solder.

The pipe bender avoids creases while maintaining the diameter of the pipe

Solders are divided into:

copper-phosphorus;
silver.

To solder the aluminum tube of the air conditioner, two types of solder are used at once. For copper tubes, it is better to choose solder with silver ions than phosphorus. This is due to the brittleness of the phosphorus substance if the alloy contains more than 10% nickel.

If the composition hard solder cadmium enters, you need to take care of your health, as the vapors poison the body.

For a high-quality connection of the tubes, a combustible mixture is selected. Check when turned on:

If the torch is of medium size and uniform of blue color, which means that the gas-oxygen mixture is well balanced in composition. The metal will heat up evenly.
The pale blue color of the torch indicates that there is more oxygen in the mixture. This will oxidize the metal, and a dark coating will appear on it.

When expanding the outer tube, observe the necessary gap into which the solder will flow. In the absence of such, the connection of the tubes will not be airtight, and freon will flow out under pressure in a matter of minutes.

How copper tubes are soldered - process and rules

Before connecting the air conditioner tube, it is necessary to clean it with emery or a metal brush. Residues of grease, earth, paint impair the adhesion of solder and metal.

Soldering air conditioner pipes is carried out with a flame gas burner. At optimal gas mixture the flame simultaneously cleans and heats the surfaces of the tubes, preparing them for connection.

To connect the tubes of the air conditioner by soldering, it is necessary to insert one tube into the other for a length equal to or larger diameter tubes. The gap is from 0.025 cm to 0.125 cm.

The tubes are heated with a burner evenly. In order for the solder to penetrate the gap, the temperature of the inside and outside must be the same. In this case, not only the place of the proposed welding is captured, but also a little further - 7 centimeters in each direction.

The heated solder rod is dipped into a flux, a thin layer of which protects it from oxide. The smaller the flux layer, the better soldering is obtained.

After it turned out to solder the air conditioner tubes, the flux residues are cleaned off.

Conditions that are observed during work:

The burner must have a flame reduction function to control the heating process. The overheated tube is deformed and the end has to be sawn off.
Flaring is carried out on the pipe that lies towards the going freon, so that there is no friction and resistance at the place of soldering. For example: if freon goes to the left, then expand the right side of the tube and vice versa.
Since some solders emit harmful gases during heating, ventilation or a respirator should be provided.

Brazing

The low-temperature mode of joining two metal parts implies heating the main parts below 427 degrees, that is, below the melting point of the base metal. With this method, the metal oxidizes less, and local heating can be achieved. Saves energy and materials. The result is a neat, precise seam.

Features of brazing

High-temperature soldering is not used for the freon route

The melting temperature during high-temperature soldering is above 427 degrees, but below the melting temperature of the parts to be joined. The technology is different from low-temperature. Vacuum soldering uses soft tin solder. High-temperature technologies are used for joints that will later work with high temperatures.

For self-fulfillment work at sufficiently low temperatures. Not expected in pipes high temperatures freon, but the connection must be made tightly to avoid refrigerant leakage during operation.

Air conditioner pipe welding

The method of argon welding of air conditioner tubes is used when aluminum tubes are worn or deformed. Argon welding is used because heated aluminum is covered with an oxide film when interacting with oxygen. Argon prevents contact with oxygen and film formation.

The tube welding method is good for repairing auto air conditioners.

Photo of a beautiful girl to attract your attention

Welding aluminum is not an easy task

The high electrical and thermal conductivity of aluminum, very low weight, combined with the excellent mechanical properties of its alloys, have made this material indispensable in many areas of production. But for all its unique properties, this metal is very difficult to weld. The ability to weld aluminum with high quality is what distinguishes a highly qualified welder from an amateur welder.

There are two main ways of welding aluminum parts:

MIG aluminum welding semi-automatic
TIG welding of aluminum

Sometimes it is necessary to connect aluminum parts among themselves, but at the same time there is no suitable welding machine or a professional welder, and the strength of the connection does not play a special role. In this case, the method described in our video instruction will come to the rescue.

You will need:

propane burner
Aluminum Brazing Rods
Surface degreaser
Clamps for holding parts together

"Welding" aluminum without using a welding machine

Attention

In fact, it is certainly not welding. This method, perhaps, can be called soldering. Despite this, this method is quite suitable in the case when the parts to be connected will not experience strong loads, and not strong ones either. For example, to make decorative items, souvenirs.

So, if you need to weld aluminum parts, use the services of professionals. Or buy a welding machine and become a pro yourself. Good luck!

AT modern construction use a wide variety of pipes. Also exists big choice ways to connect them into a single pipeline. Some require the use of special equipment and skills, while others can be handled by just about anyone. This article will discuss how to connect two pipes.

We connect metal pipes

Welding of metal pipes

To connect two metal pipes, two methods can be used:

welding;
threaded connection.

The first option in recent times used less and less. The fact is that welding requires the use of special equipment - a welding machine. Also, such work should be carried out by a specially trained specialist.

The connection itself can be made using various methods:

transverse butt;
longitudinal butt;
one-sided corner;
double-sided corner;
socket overlap, etc.

Most of these terms are familiar only to specialists. Therefore, if a decision is made to connect the pipeline using electric welding, then it is better to call the master. The joints themselves are strong and reliable (subject to a well-done job).

Soldering copper pipes

If copper pipes are used, then the soldering method is used. Such pipelines are mainly used in elite buildings (copper is very expensive). Therefore, one cannot do without a highly qualified specialist, although if you read the article “Soldering copper pipes with your own hands”, you can try.

A more common method is a threaded connection. Anyone can assemble any pipeline using this method. Wherein assembled structure can be either straight, or with turns and bends. To do this, threads are cut at the ends of the pipes and a special lock nut is screwed on.

Threading a pipe by hand

The thread can be cut both at the factory and at home, because when installing pipelines it is often necessary to cut pipes, in which case you can do the cutting yourself. For this, most often, a special device is used - a klupp. This is a special, small tool made of high-strength material. By screwing this device onto a pipe, a thread is cut on it.

Klupp

The locknut is screwed onto the pipe joints. The result is a strong and reliable connection. Tow or fum tape wound around the thread is used as a sealing material.

You can also meet the connection without the use of nuts. In this case, fum or tow is wound on the thread and the pipes are screwed into the purchased coupling with an internal thread.

Scheme of pipeline installation on a threaded connection

Among the advantages of this method of connecting two pipes are its simplicity (all work is carried out without welding), reliability and collapsibility of the resulting joint. Namely, these properties are needed when creating intra-apartment pipelines.

Connection of pipes from other materials

Soldering polypropylene pipes

The connection of two pipes made of HDPE and plastic can also be carried out using welding (in this case it is called soldering) and using fittings.

When soldering, two methods are used:

Butt.
With fittings.

The first option requires special equipment and can be performed by a highly qualified specialist. Butt soldering is used only when installing pipelines large diameter, therefore, when creating household communications, it is not applied. Soldering using connecting elements (electrowelded or special) can be carried out independently.

Compression fittings

But most often use connections without soldering. For this, special fittings are designed, such as:

compression;
reduction.

The first option is used when connecting pipes of the same diameter. In this case, the pipes themselves can be different materials.

Reducing fitting

Reducing fittings are used when it is necessary to connect pipelines with different diameters.

The principle of their use is quite simple. A fitting is put on each end of the pipe. Then, using wrench, the nut is tightened. The result is a strong and collapsible connection.

Press fitting for metal plastic pipes

Docking of metal-plastic pipes is carried out in two ways:

Compression fitting. During installation, the ends of the fitting are inserted into the pipe. They have rubber seals that hold them securely inside. Then the fitting is pulled together with a collet and fixed with a control nut. Such a connection can be subsequently disassembled.
Press fitting. This method is used less frequently, since the joint is one-piece. The fitting shanks are inserted into the pipe. Then, using a special device, the flexible cuff is crimped. The result is a strong and reliable connection.

Having familiarized yourself with the methods of connecting pipes, it remains to choose the product with which it will be most convenient for you to work.

Video

This video shows how to weld metal pipes with electric welding:

See how a plastic pipe is connected to an iron one:

kakpravilnosdelat.ru

It's simple - How to connect plastic and metal pipes without welding || STROIM-GRAMOTNO.RU

Pipe Fittings
Thread connection
Cutting
Difficult option

the entire plumbing system and only from the pipes, as you wanted it, everything will fail. heating radiators, heated towel rails are still made of metal. to prevent emergencies leaking joints, you need to know how to connect the plastic metal pipe welding.

Fittings for PVC and pipes

Times, in stores desired element practically impossible, fortunately, for a long time Therefore, combining and plastic, the need to invent Everything has already been invented, produced, put up for you, you just have to go to pay for the purchase, it's too expensive for you) to bring home. the main thing is to buy what you need and a metal pipe.

By the way, fittings designed specifically for joints of metal plastic pipes, these are quality products that are capable of you enough on the condition that you can install correctly.

threaded

Since plastic and pipes without can be a few to start with the most popular ones.

So, you have a metal pipe, on your own thread for another. And for the question of how it is with a plastic thread that has it, you again need to buy it in the store. A fitting, you will purchase this, which is a coupling, with a threaded sleeve fused into one. Please note that the Americans are for different connected pipes.

In this metal plastic pipe connection as follows:

using a special soldering iron for pipes, weld onto the pipe. joint cooling.
metal pipe, it to the other and twist it with it. For sealing, you can use
Turn on the water to make sure it doesn't leak. turn off the leak again, unscrew the nut, repeat the procedure again with the old FUM tape.

Cutting

Threading dies

If there is no pipe on your pipe (this happens, you decide to use a new plastic pipe in your apartment or apartment), you will have to thread it first. Do this with a called threader. They can also be electric. you will be dependent only on its availability to you.

An electric threader is not out of the box. So if you need it for one or two times, then rent it from someone, don't buy it. True, it’s easier for them than with a lehr, so you don’t have to put any practical effort (for holding the pipe to its true if it comes out of you. The threader kit includes types of lerok for different pipes.

Pay attention If the distance of the pipe to is too small, you will just be able to put on the pipe. also fast enough and you take breaks from work, slicing into several

Regardless of which thread cutter you use, there are some that you need to get a neat result of the required length:

the beginning of the work must be cleaned available on the paint.
If the surface of the pipe is dripping metal, be sure to
When using manual, try not to do it first forward, then turn back, repeat everything until the thread is at your length.

option

clamping sleeve

The connection with the help guarantees a tight seal. However, there are times when, when considering, to connect the plastic metal welding pipes, refuse to go. Usually it happens because the metal is too long or located to and you can’t thread it.

This will have to use difficult option, some consider it unreliable. In fact, this is so, and you are correct, then plastic and pipes will last long enough.

connecting the two you will need a Quick coupling (made in Poland):

Clear metal pipe old paint.
disassemble the elements of the coupling in your hands.
Consistently on the metal part of the coupling. from the seal to the end must be less than 10
Gently insert the metal pipe into the connecting body, then slide all the rings and the nut into it.
So Coupling reverse side thread, then you can connect the metal with the American, to the pipe

By choosing this connection, not that Quick couplings are produced in different diameters. And if you have a coupling on a pipe, then most likely you did not buy what you

Well, to check how much you have tightened on the pipe, pull holding the second pipe so as not to pull out of the wall, it should not be along the pipe.

records

stroim-gramotno.ru

How to connect two pipes of the same diameter: actual ways of self-implementation

In this article, we will consider what is the instruction for connecting one-dimensional pipes made of various materials. The topic of the article is interesting, as there is a wide range of products on the market. various pipes, which differ from each other not only in operational and technical specifications, but also by different methods of connection into a single system.

But, before considering the specifics of the installation work, consider what types of plumbing accessories can be purchased.

In the figure, a threaded connection of heating pipes made by means of a coupling

Classification

Collapsible connection profile pipes bolts in the construction of the greenhouse

All water pipes, in accordance with production materials used in their manufacture are divided into the following categories:

metal modifications;
polymer modifications;
plastic products.

Important: Each of these modifications is on the market a wide range products that are characterized by one or another method of connection. Therefore, when planning the installation of plumbing in your apartment or country house, it is necessary to take the choice of materials and methods of connection with the utmost responsibility, since the price, durability and appearance finished system.

So, let's look at how the mixer is connected to the pipe on its own.

Docking of metal pipes

Threaded connection on a steel water pipe

During the installation of metal (cast iron, steel and copper) plumbing and heating systems threaded and welded joints are used.

Let's look at each of these methods in detail:

Threaded installation, by the way, also includes the connection of pipes by an American, this is a technology that allows you to assemble water pipes from elements with the same cross-sectional diameters.

To do this, a thread is cut at the ends of both pipes, over which a special metal coupling is screwed - a fitting. By means of special fittings it is possible to assemble both straight and curved plumbing and heating systems.

The fitting used on such structures has an internal thread, while the pipes have an external thread. If the fittings for installation are purchased with already threaded threads, then on the joined elements it will have to be cut with your own hands using dies.

Among the advantages of the technology, we note the strength and durability of the finished result. In addition, if necessary, the threaded fitting can be untwisted and the entire structure can be disassembled in order to fix the breakdown or redo it.

Important: As a rule, standard threads are used on pipes and fittings. But if foreign-made accessories are purchased from little-known brands, you need to make sure that the product will match the metric thread type.

Mounting plumbing systems using welding is used infrequently. Main disadvantage welded joint- this is the impossibility of doing it yourself, since a professional welder with special equipment and experience in using this equipment can cope with such work.

For the installation of two one-dimensional pipes, the following types of welded joints are used:

transverse butt (without boring or with internal boring) with backing ring;
longitudinal butt (without a bevel or with a bevel) with a one-sided seam;
transverse butt with one-sided seam;
one-sided corner;
double-sided corner;
bell-shaped overlap.

The butt joint is the most common, as the finished result is characterized by high strength, provided that the joined elements are correctly centered.

If a water pipe with an internal diameter of up to 500 mm is assembled, a one-sided seam is welded, the strength of which is quite sufficient. If the diameter is larger, the root of the seam is welded from the inside, as a result of which the strength of the joint increases.

A welded seam is considered the optimal type of connection for the installation of industrial water pipes, but is rarely used in everyday life due to the high cost. finished version and cramped conditions for the use of the welding machine.

Soldering copper components is a technology used in the assembly of premium plumbing systems.

The installation principle is as follows:

the ends of the joined elements are cleaned and covered with solder;
cleaned and soldered inner surface fitting;
the pipe is inserted into the fitting and heated with a burner;
after the solder has cooled, a strong and durable coupling joint is obtained.

Types of connection of polymer products

In the diagram, a phased connection of corrugated pipes

If the question is how to connect HDPE pipes, then in this case, installation is an order of magnitude easier than assembling a metal water pipe. No threads are cut on plastic, and installation is carried out in two ways: by soldering or using fittings.

The connection of HDPE pipes using fittings is popular in the assembly of domestic water pipes and sewer systems. The relevance of the method is not surprising, since fittings, regardless of modification, can be installed even by a novice plumber.

Fittings, according to structural features are divided into the following categories:

Crimp modifications are simple yet effective and versatile mounting accessories. For installation, special pliers are used to evenly distribute the applied force around the entire perimeter of the crimp collar.
Press fittings are the most reliable, as they guarantee the complete absence of leaks.

Connection picture PVC pipes using compression fittings

The popularity and demand for aluminum pipes are determined by a number of distinctive characteristics. They are competitive advantages, which include:

strength,
light weight,
high corrosion resistance,
convenience
ease of installation.

Let's talk about the last one

The main method of joining aluminum pipes is welding. Many welders do not like this metal, since working with aluminum, due to its physical and chemical nature, has its own specific difficulties. The slightest oversight can lead not only to partial damage to the product, but also to its complete subsequent unsuitability.

It is not uncommon for an electrode or cutting torch to be overexposed, resulting in a hole. It is very difficult to close this shortcoming. To prevent these and similar problems, it is important to follow some recommendations.

What type of welding is suitable for the installation of aluminum pipes

The most convenient and expedient way to connect and install aluminum pipes is gas welding. For these purposes, gases such as acetylene, argon or a propane-butane-oxygen mixture can be used equally effectively. Naturally, this method welding involves the use of specialized equipment, which is very expensive. These are reducers, hoses, cylinders, interchangeable mouthpieces, etc. If you rarely work with aluminum pipes, we recommend using electric arc welding.

Purchased or self-made electrodes

For electric arc welding of aluminum, special electrodes are used (one of them is UANA). They are not cheap, and sometimes they are quite difficult to find. If the electrodes are needed urgently, you can resort to the following manufacturing method. We take aluminum wire (diameter 3-4 mm), ordinary chalk and silicate glue (sometimes called liquid glass).
We cut the wire 25-30 centimeters long, grind the chalk finely and mix with glue, obtaining a homogeneous coating, which we then apply to the wire with a layer of 1-2 millimeters and dry well. The electrode is ready for use.
Before installing aluminum pipes, the products to be joined are thoroughly cleaned of oxidized film and other contaminants. Can be used sandpaper or metal brush. When the cleaning is completed, it is necessary to warm up the pipes. You can use a traditional gasoline burner. It is important not to overheat the product.

Features of the installation of aluminum pipes

Welding aluminum pipes has its own characteristics:

Electrodes burn out quickly, stock up on plenty;,
The welding seam freezes with lightning speed;
At the end of the seam, the electrode should be torn off smoothly, without sudden movements, so that a leaky and ugly crater does not form;
The speed of the electrode movement is 3-4 centimeters per second.