How to weld a pipe in a hard-to-reach place

Soldering polypropylene pipes in hard-to-reach places – Pipes and plumbing

When installing new polypropylene pipes to replace outdated metal systems, a situation may arise when connecting pipes by welding must be performed in places that do not quite meet the conditions for such an operation.

Therefore, to independently update the pipeline, certain knowledge is required to help organize the welding of polypropylene pipes in an inconvenient place, using auxiliary tools for this.

Tools for work

A special soldering iron for polypropylene pipes and a set of Teflon nozzles help to make a high-quality connection of pipe elements. Using a soldering iron, you can easily make a welded connection on any section of the pipe. Using nozzles, you can connect pipe elements of different diameters.

In addition, soldering polypropylene pipes in hard-to-reach places requires the following tools:

A device for cutting polypropylene pipes (most often the cutter comes complete with a soldering iron).
A solution that allows you to degrease the soldering area.
Set of connecting elements.

You also need to prepare a tape measure, ruler and pencil, as well as a corner and a knife. In some cases, a rag may be needed.

Methods for welding polypropylene pipes

Soldering pipes in hard-to-reach places can be done in different ways depending on the working diameter of the pipes:

The butt welding method is used to connect pipes with a wall thickness of at least 4 mm and a diameter of up to 50 mm. In everyday life this method is used quite rarely.
The socket method is used when connecting pipes with a diameter of up to 40 mm. The operation requires a special welding mechanism equipped with a centering device.
When saddle brazing, a special bell-shaped saddle is welded to the pipe at an angle of 90 0 using a butt joint. The saddle is drilled and a piece of pipe is welded to the connection point, resulting in a T-shaped adapter at the outlet.

Welding in hard-to-reach places

Soldering hard-to-reach areas of polypropylene products is much more difficult than straight runs. To create favorable working conditions in such places, a sufficient amount of effort is required.

“Inconvenient” places include:

Space under the ceiling.
Corners of the room.
Cramped conditions for placing a soldering iron.

When welding polypropylene pipes in hard-to-reach places under the ceiling, you need to prepare a place where the welding machine will be placed when manually forming the connection. For this purpose, you can invite an assistant or hang the device on a special hook prepared in advance.

If the pipes are located very close to the wall, a special technique is used: the direct and mating parts of the joint being formed are alternately heated with a soldering iron. In this case, the heating must reach such limits that the first heated section does not have time to cool down while the counter part is heating up.

Features of soldering in corners

To solve the problem of how to solder polypropylene pipes in hard-to-reach places, for example, in corners, you need to know the features of such connections.

The joining of pipe elements in the corners of the room is carried out using blanks cut at an angle of 90 0. It is important that their ends are thoroughly cleaned and treated with degreasing agents.

The use of special corner adapters and fittings contributes to the formation of smooth transitions on pipe elements at corner connections.

The formation of corner joints on pipes located at a short distance from the wall is also performed by sequentially heating the straight and mating parts. In this case, special attention should be paid to the depth of insertion of the pipe element into the body of the corner piece. To ensure high accuracy, it is necessary to make the appropriate mark with a marker or pencil.

Deciding on how to solder polypropylene pipes in hard-to-reach places requires careful attention and accurate execution of all actions. Connecting elements that have even a slight defect must be replaced with new parts. According to experts, when making connections in hard-to-reach places, you should not turn off the power to the welding machine; it is better if it is always on.

Source: https://trubyisantehnika.ru/payka-polipropilenovyih-trub-v-trudnodostupnyih-mestah.html

Welding in hard-to-reach places with an electrode

During the construction of pipelines, as well as in households, several methods of connecting pipes are used. But among all the variety, welding is the most often used. This popularity is explained by the fact that thanks to this method, an almost monolithic connection is obtained, which has high strength characteristics. In addition, a high level of tightness is achieved.

In the photo - gas welding of pipes

Gas welding

All methods of this connection can be divided into two groups:

Gas welding using pressure;
Gas welding, which uses thermal action, that is, melting.

In turn, gas welding using pressure is also divided into the following subtypes:

Automatic contact welding;
Connection by friction;
Gas press welding;
Cold type welding;
Thermite compound.

Tip! Cold type gas welding for pipes is used when working with those elements that are made of non-ferrous metals and are ductile (that is, copper or aluminum).

The principle of this type of connection is the joint plastic deformation of the material in the place where its connections are subject to severe compression.

Welding using thermal methods:

Pipe welding using manual arc welding;
Gas welding.

The price of different methods of this type of connection differs insignificantly, so it cannot become a determining criterion when choosing one method or another.

Gas welding technology

The first stage of work is preparing the pipes for welding. Here the edges of the welded pipes are heated in the oxygen gas flame supplied from the apparatus. The gap between the edges is evenly filled with the molten metal of the rod used.

It is worth noting that the seam obtained as a result of this method has lower mechanical properties compared to the seam obtained as a result of the electric arc method.

An example of a high-quality gas seam

It is preferable to use the gas welding method if work is carried out with small thickness pipes (up to 3.5 mm). A very important step before starting work is preparing the edges of the pipes for welding.

Materials and means used in gas welding

It is worth noting that this method uses a variety of pipe welding devices.

To properly carry out the gas welding process, you must use:

Oxygen. Necessary to maintain stable combustion and high temperature.
Acetylene, which is the basis for combustion.

Gas welding cylinders

Advice! In some cases, it is possible to replace acetylene with other flammable gases. The main criterion is the temperature of the burner flame, which should be 2 times higher than the temperature at which the metal melts.

https://www.youtube.com/watch?v=Tvhw5VG5qTI

Propane and methane are often used.

In addition to these two gases, you also need:

A welding wire that acts as a filler material to fill a seam. The chemical composition of the selected wire should be as close as possible to the composition of the metal.
Fluxes. This material is responsible for reducing the degree of oxidation of materials during welding. Flux can be in the form of a powder or paste. When heated, this substance floats to the top, thereby forming a protective film that maximally prevents air molecules from penetrating the metal.

Welding technique

Do-it-yourself gas welding has a clear sequence:

Cleaning the metal surface from contamination;
Preparation of pipes for connection, namely mechanical processing of the edges. If thin-walled pipes are welded, then such processing is not necessary.

Propane torch

Separately, it is worth noting that modern technology for gas welding of pipes uses two different methods of implementation:

Right. In this case, work is carried out from left to right. The burner flame is directed to the weld area, and the filler rod moves smoothly following the gas burner. In this method, productivity increases by almost a quarter, gas consumption is reduced. This type of connection is used for pipe wall thicknesses of 5 mm or more.
Left. Here the direction of movement is from left to right, the burner flame is directed to the edges of the pipes that have not yet been welded, and the rod is moved in front of the burner. This makes it possible to weld pipes in hard-to-reach places. In addition, the presentation of a product made in this way is much higher.

Welding pipes at home

Edge cutting

Preparing pipes for welding is an important preparatory stage, on which the quality of future work depends. Preparation includes cutting edges. Remember that this stage of work allows you to apply seams in layers, each of them has a small cross-section.

When cutting edges, the structure of the seam itself improves, which helps reduce stress in the metal. The cutting angle can range from 25 to 50 degrees. The choice of a specific value depends on the thickness of the metal, as well as on the selected welding method and type of connection.

Pipe root welding should be done by a professional or under his guidance. The instructions for implementing this stage are considered quite complex, so in most cases they are left to specialists.

Welding a battery from pipes

Battery welded from pipes

Let's figure out how to weld a battery from pipes at home, if all the necessary tools and materials are at hand.

To do this, the following sequence is performed:

The pipe is cut to the required length.
The number of sections depends on your desire.
Markings are made for jumpers. For them, a pipe with a diameter of 25 mm and a length of 10 cm is installed.
Now the plugs are cut from the steel sheet.
Holes are cut for the jumpers, the central pipes are cut through, and the top and bottom pipes are cut through only from the inside.
The battery with jumpers is laid out, and “potholders” are made for fixation.
All joints are welded in a vertical position.

Conclusion

Welding pipes is the most optimal method for a hermetic connection, be it the construction of a new pipeline or the installation of sewerage or heating system pipes at home.

In the video presented in this article you will find additional information on this topic.

Source: https://rem-serv.com/svarka-v-trudnodostupnyh-mestah-elektrodom/

How to weld propylene pipes correctly?

Many people wonder how to weld polypropylene pipes and what mistakes can be made when welding polypropylene pipes? The answers to these questions are presented in this article.

For installation and repair of plumbing and heating systems, not only metal elements are used, but also parts made of various types of plastics: polypropylene, propylene or polyethylene.

Currently, these materials are popular: their installation can be easily done with your own hands, without resorting to the services of specialists. Welding polypropylene pipes (PPR welding) has a number of advantages:

Polypropylene pipes are not subject to corrosion.
Their cost is lower than metal ones.
They are light.
There are several basic ways to install them.
Quick assembly when working alone. With a partner, work can speed up.
Simple soldering methods. By following a certain sequence of actions and following the basic rules, you can obtain a finished connection yourself.
Long service life. Modern models of polypropylene products can last for several decades.

Welding pp pipes: selection of tools

Many people wonder how to properly weld polypropylene pipes at home, what needs to be done for this? Before you start work, you need to decide on the choice of welding machine. It must be selected depending on the type of soldering to be carried out. A soldering machine can be purchased, rented, or borrowed from friends.

The apparatus for soldering pp pipes can be of several types: manual, semi-automatic or automatic. The last type will be the most expensive. When working with a specific unit, you should adhere to the rules set out in this article, as well as the instructions for it.

In addition to the soldering machine, you will need:

special scissors for cutting the required size of polypropylene pipe.
marker for marking parts.
alcohol liquid for degreasing the surface of the edges.
fittings (for example couplings).
pp pipes.

It is advisable to choose couplings and pipes from the same manufacturer. If you choose different ones, there is a risk that the parts will not fit each other in size or material composition.

PP pipes are divided into types depending on the purpose and technology of use:

For plumbing systems: both cold and hot.
For the heating system, a special technology for welding polypropylene heating pipes is used.

They are also divided into varieties depending on the labeling.

The PN 10 marking is used for cold water supply with temperatures up to 20°, as well as for heating floor coverings up to 45°.
The PN 16 marking is used for plumbing systems with cold water, as well as hot water up to 60°.
Polypropylene marked PN 20 must be purchased for hot water supply up to 95°.
The PN 25 marking is used for hot water supply, as well as for heating up to 95°.

Welding polypropylene and polyethylene: differences

The melting point of PP is higher than that of polyethylene.
PP is more durable and not as flexible.
PP is more heat- and frost-resistant.

Differences between propylene pipes depending on color

White and gray colors are installed indoors; they are prohibited from being used outdoors. They are ideal for plumbing and heating systems.
Black color contains substances in its material that provide additional stability and wear resistance. This is an excellent option for use in sewer systems.
Green colored PPs are usually used for watering plantings. Some modern green products can also be used for cold water.

Preparing for work

Immediately before soldering, parts must be cleaned and degreased using special alcohol solutions. They should be free of foreign objects, dust, dirt and burrs. For work, you need to prepare not only the parts themselves, but also the place of work itself: it should not be dirty, dusty, it is recommended that there be no foreign people or objects.

The approximate temperature for working with a soldering iron is about 260-270 degrees. All parts must be prepared in advance, before heating the equipment to the desired temperature. The connection process takes a few seconds. You need to make sure that the parts are positioned evenly, then the seam will be of high quality and airtight.

The exact joining time may vary depending on the thickness of the part and the condition of the welding equipment. It should be borne in mind that if the soldering iron does not heat very much, the heating time needs to be increased. You should not start working with low-heat equipment. The connection may not be sealed.

The elements that are planned to be connected to each other must be heated at the same time.

Overheating of elements is characterized by the fact that the material becomes very soft and can be deformed upon contact with each other.

The result of overheating of polypropylene pipes

The table below contains approximate soldering temperatures, depending on the thickness of the part, welding and cooling time.

Pipe volume (cm)	Heating time (sec.)	Welding time (sec.)	Cooling time after welding (minutes)
1,6 – 1,3	5	4	3
2 – 1,4	5	4	3
2,5 – 1,6	7	4	3
3,2 – 1,8	8	4	4
4 – 2	12	6	4.
5 – 2,3	18	6	5
6,3 – 2,6	24	6	6
7,5 – 2,8	30	8	8
9 – 3	40	8	8
11 – 3,3	50	10	10
16 – 3,5	80	15	15

Welding PP pipes

When the plastic melts, the parts need to be removed from the soldering iron nozzles and carefully connected. This needs to be done quickly. Do not press or twist them too hard. You need to keep the elements level. If for some reason the seam turns out to be of poor quality, it is no longer possible to separate it. You can only use scissors to cut out this seam and solder the edges again.

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Types of soldering of plastic pipes

There are three types of joining plastic parts:

Butt.
Coupling.
Electrofusion.

The butt method is the result of joining molten edges. The parts are fixed to each other using a special welding machine for butt welding.

Butt welding machine

Coupling is a method of soldering using couplings. A coupling is a special device designed to connect parts to each other. The coupling method is also carried out using special welding equipment.

The electrofusion method of connection is carried out using special electrical couplings. The equipment heats the electric coupling, or rather, the spiral inside it. Typically, soldering PPR pipes using this method is used when it is necessary to connect products of large diameter and/or in places with the possibility of seismic activity.

Electrofusion welding machine

For each of the above types of connections, there are certain types of welding equipment on sale. There are general rules for using such welding equipment, as well as instructions for welding polypropylene pipes with a specific model.

The butt welding machine, in turn, is divided into manual, semi-automatic and automatic. Manual equipment is used when connecting elements operating under medium and low pressure. Their management is completely dependent on a person, its functions are not automated, and there is no possibility of recording (logging) data.

Semi-automatic equipment is automated, but not completely. Usually, we are talking about the possibility of logging temperature data. Automatic equipment does not require human monitoring and control. You just need to set the necessary parameters, and the machine will independently select the required welding mode.

The last type of welding equipment is the most expensive, but also the most effective. It eliminates the possibility of errors or defects.

Automatic welding machine with logging function

The above three types of connections are not used for connecting thick-walled plastic parts (various tanks, barrels, children's slides). A welding extruder is used to connect them.

This is a special device that ensures the connection of plastic elements by extruding already molten filler material into the welding area. For this type of soldering, it is enough to lay only one seam. The ends of the parts are also heated with warm air.

Special granules are used as filler material (rod), which are identical in composition to the material of the surfaces being welded. A manual extruder can be screw or screwless. Typically, this device is used to connect polypropylene sheets, grooves and propylene corners.

Thus, you can weld plastic pipes with your own hands at home. To do this, it is important to decide on the type of soldering that you will use for the connection: butt, coupling or electrofusion. It is also necessary to select the appropriate welding equipment, couplings and fittings.

In addition, you need to follow the basic rules for welding polypropylene pipes, follow the table with recommended soldering temperatures, which are set out in this article.

After reading them, as well as watching the video below, you will know how to properly weld polypropylene pipes.

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Source: https://gscomplect.com/kak-pravilno-svarivat-propilenovye-truby/

How to solder polypropylene pipes in hard-to-reach places

Plastic pipes are being used more and more often than metal ones, since they have undeniable advantages, which include a longer service life - up to 50 years for polypropylene pipes, as well as high sound insulation characteristics, resistance to temperature changes, low electrical and thermal conductivity.

PVC pipes are also popular because they are very durable, reliable and easy to install.

Initially, such products were not soldered. Polypropylene pipelines were connected by gluing with special adhesives.

In some countries of the world, polypropylene pipes with small diameters, which are used indoors, are still connected by gluing today.

However, a more reliable and simpler method of fastening is soldering. From this article you will learn how to solder polypropylene pipes with your own hands.

And so that you better understand the technology of work, we recommend reading articles and watching videos on how to solder polypropylene pipes.

Required Tools

For soldering work you will need:

roulette;
scissors designed for cutting PVC pipes;
soldering iron designed for polymer pipes;
building level.

Most of these tools are well known to those who have ever participated in construction work.

Therefore, if you decide: we solder polypropylene pipes yourself, you probably already know the necessary tools well, or you can borrow them from your friends or colleagues.

If you don't have the tools yet, they can all be easily purchased at a hardware store. It can be difficult to find just the right scissors and soldering iron. As a rule, they are purchased as a set.

How to solder polypropylene pipes with and without a soldering iron?

Of course, this tool must be available if you are going to connect PVC pipes. Specialized scissors are also called roller pipe cutters.

The tool is available for sale in one of two modifications according to its intended purpose:

for pipes with an outer diameter of 1.6-4 cm;
for pipes with an outer diameter of 1.6-11 cm.

Soldering iron selection

A soldering iron suitable for cutting pipes is also called a manual welding machine. The tool is a heating device that has a sole equipped with heating elements.

As a rule, it is equipped with holes of different diameters in which soldering nozzles are fixed. The soldering iron is equipped with a temperature regulator.

It also has a heating indicator, a comfortable handle and a special stand. The latter allows you to install the device on a flat surface. The tool is turned on and off by pressing additional switches.

It is the soldering iron that helps answer the question of how to solder polypropylene pipes for heating or plumbing, and how to connect them.

And if you plan to install the pipeline yourself, you should get this device. Depending on the purpose, the tool intended for working with polypropylene pipes comes in two modifications:

for PVC pipes with a diameter of 1.6-5 cm with a maximum power of 650 W;
for PVC pipes with a diameter of 6.3-11 cm with a maximum power of 1600 W.

Any soldering iron is equipped with paired nozzles of different diameters and a stand.

If you don’t yet know how to solder polypropylene pipes in hard-to-reach places, take a closer look at the soldering iron attachments.

As a rule, they allow you to perform complex work.

Soldering iron tips are coated with a non-stick coating, similar to the coating used in cookware.
Therefore, the instrument requires special care and cleaning.

Recommendations - how to solder polypropylene pipes

Before starting soldering work, you should carefully study the technology, the necessary instructions, and learn how to use a soldering iron in order to reduce the risks of irreparable errors.

When soldering pipes, you must remember that this is part of the soldering of the pipeline, so work should begin with its most difficult step - marking.

It is the markings that will tell you how to solder polypropylene pipes smoothly. It is good when the marking is carried out by a specialist who is familiar with the drawings of the pipeline system and represents the implementation of the drawings.

Pipe cutting

Before cutting the pipes, measure the interval between the fittings and add 3 cm to the resulting distance. After this, carefully cut the pipe at a right angle with special scissors.

Fittings are put on the pipe, marking the depth on it with a marker, thereby applying a transverse mark to the product. And the longitudinal one will make it possible to join pipeline elements along the axes.

Soldering of polypropylene pipes

First, turn on the soldering iron and insert a nozzle of the required diameter into its hole. Using a thermostat, you need to set the optimal soldering temperature.

At what temperature should polypropylene pipes be soldered?

Recommended value:

260°С – for polypropylene pipes;
220°C – for polyethylene.

The soldering iron is heated up for 10-20 minutes. You can know when it is ready for use by the heating indicator.

Next, the pipeline element that needs to be heated is put on the soldering iron nozzle at a moderate pace. It is heated for the time required by the technology and quickly removed from the nozzle, holding the soldering iron, if necessary.

How long does it take to solder polypropylene pipes? As a rule, a polypropylene pipe cools down in 8-10 seconds, which means you need to work quite quickly. Using the nozzle, you can heat two elements at a time - parallel along the outer and inner surfaces.

The heated element is placed on the pipe, aligning the transverse and longitudinal marks. After this, the quality of the connections is verified. It is important that the solder seam is smooth in appearance.

For a high-quality connection, it is better to solder the pipes within the time specified in the technological tables.

Protective gloves should be used during work. Working with polypropylene pipes must be done carefully and patiently.

Soldering pipes is a simple process, but very responsible. If you want to better understand how to solder reinforced polypropylene pipes, the video on this page will help you understand the soldering technology.

Connection of PVC pipes with metal-plastic pipes

How to solder polypropylene pipes with an aluminum layer? How to connect them? Is it possible to solder polypropylene pipes from different manufacturers?

In cases where such questions arise, special adapters must be used when soldering.

One side of them is attached to metal or metal-plastic by means of a thread, the other is soldered to plastic using standard technology.

The only difference in the work is that threads must be cut on the metal and the connection must be sealed manually to avoid leaks. It is best to use tow or sanitary flax fiber as a sealant. This material is affordable and effectively seals the joint.

Using the same technology, adapters are installed, on the basis of which mixers are connected. The products externally look as if metal threads were fused into polypropylene.

How to check the connection for leaks

Upon completion of installation work related to the organization of the water supply system, you can begin to check the quality of the pipeline.

To do this, water is supplied to it. The valve is opened to the house or apartment, then the faucet taps in the rooms are opened. The water pressure should be maximum.

First of all, they feel the joints, especially carefully observing the threaded connections.

Sealed joints leak very rarely if the work is carried out in accordance with the technology and the specialist knows well how to properly solder polypropylene pipes for heating, water supply, reinforced with fiberglass or aluminum, large or small in diameter.

But if a leak is detected in the welded pipes, the water is turned off, and the vulnerable pipe connection is redone, having previously been cut off. Before soldering, the pipes are wiped dry so as not to break the soldering iron and warm up the polypropylene well.

If a leak is detected at a threaded connection, it can be carefully tightened with a wrench so that the thread does not break.

Another option is to strengthen the seal. But in the latter case, you need to turn off the water and unscrew the connection.

Now you know more about how to solder polypropylene pipes with a soldering iron, what tools to choose for installation work and how to use a soldering iron correctly.

Follow the recommendations of experienced specialists when creating a pipeline, arranging it yourself, or seek installation services from professionals.

Source: https://iseptick.ru/truby-i-fitingi/polipropilenovye-truby/kak-payat-polipropilenovye-truby.html

How to cook heating using electric welding in hard-to-reach places

When building a new house or during a major renovation of an apartment, you have to decide on the installation of new heating elements. Moreover, the problem here is not only in the choice of radiators and pipes through which the coolant will move, but also in the method of combining disparate parts of the structure into one reliably operating system.

There are several options for connecting pipes: replacing heating radiators with gas welding, electric welding or a threaded method. Although each technology has pros and cons, most craftsmen are inclined towards gas welding work. Why? Let's look at it in detail and with examples.

Features of gas welding technology

The fastening of heating pipes by gas welding is carried out according to the following principle: the end parts of the two elements are combined, and then gradually heated in the gas-oxygen mixture to high temperatures.

For special weld strength, filler material in the form of wire or rod is used. When the hot metal cools, a monolithic joint is formed.

Advantages and disadvantages of joining pipes by welding

One of the main reasons for the popularity of the gas welding method is the specific operation of our heating systems. When the coolant circulates, all structural elements are constantly under pressure, which deforms the joints.

Therefore, a strong weld seam reliably protects against breakthroughs and helps prevent accidents during short pressure surges and even water hammer, which often accompany the startup and shutdown of centralized heating.

Advantages of the gas welding method:

Durability and reliability of the connection (it is believed that the strength of the seams after gas welding even exceeds the strength of the radiators themselves!).
Possibility of using parts of any shape and size. The only requirement is that the elements be made of metal with a thickness of no more than 3.5 mm (if this is exceeded, it is more economical to use electric arc welding).
An aesthetic point - pipes and batteries, welded by gas welding, become a solid monolith, which can be easily repainted in a color that matches the interior.
You can carry out work without connecting to the electrical network (especially important for a new building).
Many metals from which pipes are made, such as copper, cast iron, brass and lead, form the strongest joints using gas welding.

The main disadvantage of this installation method is the large heating area. As a result, it is easy to damage furniture and flammable finishing materials, such as parquet, wallpaper, plastic wall panels, chipboard or MDF.

To avoid destruction, it is recommended to remove thermally unstable elements from the work area, and cover immobile elements with asbestos sheeting or other protective material.

In addition, gas welding releases substances into the air that are harmful to health; working without special protective equipment is strictly prohibited. That is why everyone who wants to master a gas welding machine in practice must study the safety rules and obtain permission to work.

Restrictions on working with a gas welding machine

Installation of a heating system using gas welding is permitted only by professional welders who, in addition to special education, have permission to carry out work from the fire service.

Please note that the document is issued only for a certain period, so when hiring a specialist, you should not just look at the “crust”, but also study its validity period.

Other mandatory requirements for welders: the working order of the gas apparatus and mandatory protective equipment - goggles, work gloves, a shield.

It is advisable that the master use filler wire for seams and modern equipment operating on a mixture of oxygen and acetylene. Other flammable gases, such as methane or propane, are acceptable provided that their combustion temperature is twice the melting point of the filler rod.

If you are not a professional gas welder, you can contact local heating networks or the organization that manages the house to carry out the work. To do this, the owner of the apartment draws up a statement about the need to replace the batteries and agrees on a date to shut off the flow of coolant in the common building main.

After welding and installing the radiators, the invited craftsman must perform a crimp test and make sure that the system is working properly. It is strictly prohibited to independently stop and start heating in apartment buildings.

Differences from other installation methods

An alternative for connecting pipes when replacing batteries is the threaded method. It is especially popular among home craftsmen who do not have in their arsenal such expensive equipment as a gas welding machine and the skills to work with it.

In this case, the assembly of the system and installation of the batteries selected for replacement is carried out using threaded threads and special connecting elements - tees, fittings, nuts and other adapters.

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The main (and perhaps the only) advantage of the threaded method over the gas welding method is the ability to assemble the system quietly and without fire hazards with your own hands, without resorting to the expensive services of professional craftsmen. And such a structure can be disassembled in the future if there is a need to clean or replace any element.

But the assembly process requires detailed study, precise fitting and correct selection of all connecting elements. And even if you manage to do everything correctly and start the system, over time it will still fail.

As a result, water will quickly find “weak spots”, undermine the sealing gaskets and break through. Therefore, in high-pressure lines, threaded connections quickly “give in” under the pressure of water hammer.

Another popular alternative to gas welding is electric heating. Both technologies work on a similar principle - heating to the melting point and joining metals. At the same time, electric welding is a little cheaper, and the scale of “destruction” after such work is small, since the heated area of the electric device is much smaller.

But despite these advantages, gas welding has an important feature - the ability to regulate the melting rate by changing the flame angle. Unlike almost instantaneous heating by electric welding, gas technology works gradually, without disturbing the structure and strength properties of the metal.

That is why gas welding is by far the leader when choosing a method for replacing batteries among those who like to make repairs efficiently and reliably.

Requirements for the process of replacing radiators

Modernizing home heating is impossible without preliminary calculations and selection of batteries suitable for the design. Moreover, it is not at all necessary to replace old radiators with identical ones.

Source: https://MyTooling.ru/instrumenty/kak-varit-otoplenie-jelektrosvarkoj-v

Methods for soldering polypropylene pipes in hard-to-reach places

Due to their performance characteristics and low price, polypropylene pipelines are very popular. However, when installing individual elements, fittings, and shut-off valves, difficulties sometimes arise due to the lack of access to the welding site. In order not to stop the work process, you need to study the principles of soldering polypropylene pipes in hard-to-reach places.

Hard to reach place for pipe soldering

Soldering methods

Hard-to-reach places include corners and joints between the ceiling and wall. The ability to solder pipes in such places will help not only to assemble a new pipeline, but also to repair the old one. There are two ways to weld polypropylene pipes in hard-to-reach places.

Electro-coupling soldering technology

PP pipeline parts can be connected using an electric coupling. It is suitable for pipes with a diameter of 20 mm. Stages of work:

Clean the surfaces to be joined from dirt, dust, and degrease. Wait until completely dry.
Prepare tools.
Using special scissors for polypropylene, cut the pipes at an angle of 90 degrees.
Remove the internal chamfers and center the tube holes.
The parts to be joined are clamped using a positioner so that they remain movable during soldering.
An electric coupling is put on the connection point.

All that remains is to remove the holding tools and wipe off the dirt from the connection.

Often after soldering, plastic smudges and unevenness form on the finished seam. They can be removed with fine sandpaper. When grouting, do not use excessive force, as this may damage the seam.