Bending the pipe is often required when installing communications. If the work is done by professionals, everything goes relatively quickly and easily, because companies of this profile have not only the necessary knowledge and experience, but also the appropriate tools. But what if you need to bend the pipe at 90 degrees at home, but there is no pipe bender at hand? Consider all the options for performing such work.

Manual bending of structures 90 degrees

It is possible to bend a pipe at 90 degrees without a pipe bender only in a few steps. Otherwise, the structure is simply deformed. Usually 5-6 receptions are enough.

How is the work done? The pipe is gripped by the hands, gradually bending under the thumb rest. Then we move our fingers one cm and perform similar actions. And so five or six more times. Working without a pipe bender, manually, is not as easy as it seems at first glance. Therefore, it is recommended to pre-bend the unnecessary pipe sections.

This method is suitable for structures with dimensions 16, 18 and 20 mm. However, work can be carried out on products of large diameters. It should be borne in mind that in this case it will be more laborious.

Bending structures 90 degrees by heating

Aluminum or steel structures can be bent with a gas torch. For this, the structure is fastened in a vice, then warmed up in the place where the bend is planned. The burner can be removed when a leaf brought to the heated zone starts to smoke. If the structure is steel, the color at the heating point should be red.

Bending the pipe with a plane-parallel plate

To carry out such work, the structure is fixed in a clamp. Bending is then performed along the plate. This is a simple method that does not require significant investment. The only drawback is the unchanging curvature of the plate. However, you can use workpieces with different curvatures to work. The method allows you to bend steel structure... However, the length of the pipe must be sufficient.

Bending the pipe with a metal spring

This method allows non-ferrous pipes to be bent 90 degrees. At the same time, they must be characterized by sufficient plasticity. Why do you need a metal spring? It prevents deformation of the structure. The size of the spring must match the internal dimensions of the pipe. It is inserted into the structure, then bending is performed.

Bending the pipe when applying sand

This method allows the aluminum pipe to be bent 90 degrees. The method is very simple. It is required to fill up the sand inside the structure. Then plugs are put on the ends of it. The required space heats up. Heating can be done using any tool: soldering iron, gas torch, and so on. After sufficient warming up, bending can be performed. Why is sand needed? It, like a metal spring, helps prevent deformation of the structure. After the work is over, the plugs must be removed from the pipe, and then the sand must be removed from the cavity. Keep in mind that if you need to perform bending on galvanized structures, remember that they cannot be heated, as this will deform the product.

If you are interested in how to bend a pipe at 90 degrees without a pipe bender, we recommend that you familiarize yourself with information materials: photos, videos. So you can find out more information, see how professionals do this work, take note of various tricks and nuances.

Home repair, in particular the repair of a private house, often requires the use of pipes, and not always perfectly flat. In such a situation, the question arises: how to bend a pipe without a pipe bender at home? If you know all the tricks of this process, then it's quite easy to do.

Methods for bending a metal pipe at an angle of 90 °

Metal is a fairly strong material, but with special impact it is quite easy to bend. Today, there are several methods of bending a metal pipe with your own hands.

Modification of a profile pipe

This type of metal structure is often used for the construction of greenhouses. different sizes and purposes, as well as gazebos and other structures on the site. The main feature of the building material of such a pipeline is that when bending it is very easy to damage it, for example, it can easily flatten or crack. The way out of this situation is quite simple. Its cavity must be filled with dry fine sand or water (in the future, the water must be frozen). It is these actions that will eliminate the possibility of damage to the pipe and achieve the desired result. The same technique is suitable for both duralumin and brass piping.

How to bend a square shaped tube?

If you have a square tube with a small cross section in your hands, then it can be easily bent without heating. However, filling the cavity with sand or water is still desirable. Unlike the usual round blanks, you need a rubber mallet.

The pipeline itself must be placed on two reliable supports. After that, using the mallet directly, bend the product, and all actions must be done very smoothly and carefully in order to avoid possible damage. If you need to achieve a sufficiently large angle of curvature, the material can be heated at the expected bend to facilitate the process.

Bending rules for metal-plastic

It is the metal-plastic pipe that is most often used to equip the underfloor heating system. To ensure the efficiency of the system, it is necessary to ensure the parallel operation of the pipeline with the heating system.

Features of laying a warm floor imply the presence of a large number of folds. However, they are not available on free sale. You have to do the bends yourself, and for this you need to know all the secrets of the material and the procedure.

Just as in the case of a metal workpiece, there are several ways to get the required twist:

• the easiest and cheapest method to bend the pipe on your own, without the use of available tools. To do this, the building structure should be clamped tightly in fists and bend it smoothly. Try to eliminate the possibility of a strong bend. There is a norm for this, which assumes the presence of 15 ° curvature for every 1-2 cm of the metal-plastic workpiece;
• for another method, you need to take care of the presence of pieces of wire with which you need to fill the cavities. This will allow you to achieve a smooth and even bend in the shortest possible time;
• as for a metal pipeline, dry fine sand can be used as a filler, which must be poured into the cavity and the pipe openings closed with plugs. One end of the building structure must be fixed, and it is desirable to do this rather reliably and firmly, and then, using a blowtorch or a gas torch, heat the place of further bending. Checking the readiness of the material to change shape is checked with a piece of paper.

Features of bending polypropylene pipes

There are situations when you just need to bend exactly polypropylene pipe... However, the opinions of manufacturers agree on one thing: it is undesirable to do this. But if you can't do without it, use one of two possible methods.

Basic methods for bending polypropylene material:

• the first method involves the same heating of the bend point. It is necessary to use a building hair dryer for these purposes. Optimum final temperature 150 ° C. Further, it is recommended to protect your hands with gloves resistant to high temperatures, bend the product to the required shape. The main thing is not to forget about the basic rule: the thickened wall of the polypropylene structure must be placed on the outside of the bend. Now wait until the material has completely cooled and inspect it carefully. There should be no dents or cracks on the surface;
• the second method is cold. Everyone can bend such a pipe with their hands, however, the bending radius should not exceed 8 diameters of the pipe used, otherwise you can simply break it.

How to effectively fold a plastic pipe?

Instructions to help you bend easily enough PVC pipe, includes several points, by completing which, you will give the desired shape to the plastic pipe without any help at home and at home. So, to work with PVC pipe, you need to follow these steps:

1. Purchase a fiberboard, from which in the future you will need to build a special frame. You need this frame in order to shape the plastic structure.
2. Once the slab has been shaped to the desired shape, it must be sanded properly. It is better to use fine sandpaper for this.
3. The next step involves shaping the silicone into a suitable shape and size for your plastic blank. This shell serves as a mount PVC construction in a frame prepared in advance. In addition, it is capable of performing a protective function against scratches, chips and other mechanical damage to which the surface of a plastic pipe is exposed.
4. Now you should place the item itself in the prepared protective shell.
5. The next step involves heating the bend. Plastics exposed to high temperature, begins to soften and settle on the installed frame. This will ultimately lead to the desired shape of the plastic blank.
6. After shaping, it must be allowed time to cool. For this, ten to fifteen minutes is enough. Only after that you can safely remove your modified PVC pipe from the frame, after which the structure must be left again to completely cool it.

It is quite difficult to achieve an ideal pipe bend, regardless of its material, at home. However, if you carefully study the theory and conduct more than one experiment on unnecessary sections of such a pipe, you will in practice clearly understand how to bend a pipe without a pipe bender and you can do it at any time convenient for you. Be sure to use our advice to get the job done as correctly as possible and without big losses.

The question of how to bend shaped tubewithout using special equipment for this, many of those who are going to build on their own personal plot greenhouse. Such structures, made of bent pipes, not only transmit significantly more light, but are also highly stable and durable when compared with structures made of wooden blocks. It seems that it is not easy to bend a professional pipe, creating an arched structure from it, but if you understand the features of this process, it is quite possible to efficiently perform it using the simplest devices for this.

What is the difficulty of bending profile products

The essence of bending of rolled metal, regardless of the shape of its profile, is that the profile pipes are given a partial or full bend. Such a technological operation is performed in two ways: by acting on the bent pipe only by pressure or by additionally heating the section of the pipe in the area of \u200b\u200bwhich the bending is performed. During the bending, two forces act simultaneously on the metal pipe:

• compressive force (from the inside of the bend);
• tensile force (from the outside of the bent section).

It is the impact of such multidirectional forces that causes the difficulties typical for the bending process of any shaped pipes.

1. Segments of pipe material, which changes its shape during bending, may lose the alignment of its location, which leads to the fact that individual sections of the pipe will be located in different planes;
2. The wall of the professional pipe, located on the outside of the bend and subjected to tension, may not withstand the load and burst.
3. The inner wall of the pipe, subjected to compression, can become covered with folds that resemble a corrugation.

If you do not take into account the subtleties of this technological process, then instead of bending the profile pipe, you can simply crush the product, irrevocably ruining it.

To prevent this from happening, it is necessary to take into account not only the characteristics of the pipe material, but also its geometric parameters - the dimensions of the section, the thickness of the walls, the radius to which it is necessary to bend. Knowledge of the above will allow you to choose the appropriate technology and bend the professional pipe correctly, without crushing it and not getting a corrugated surface.

The need to account for the profile

The category of profile pipe rolling includes products that have different shape cross-section - round, square, oval or flat-oval. Despite such a variety, rectangular or rectangular are predominantly used for the construction of a greenhouse or canopy. This is due to the fact that it is much easier to mount the outer covering on their flat walls.

The range of modern profile pipes is very diverse. Their geometric parameters, the main of which are the cross-sectional area and the wall thickness, determine the plastic capabilities of the product. The latter characterizes such an indicator as the minimum permissible radius of curvature. It is this parameter that allows you to determine to what minimum radius the professional pipe can be bent so that it does not undergo damage.

To determine such a parameter of a pipe with or a rectangular profile as the minimum bending radius, it is enough to know the height of its profile. If you are going to bend a profile pipe with a rectangular or square cross-section, you should adhere to the following recommendations.

• Pipes with a profile height not exceeding 20 mm can be bent in sections whose length exceeds a value equal to 2.5xh (h is the profile height).
• Products with a profile height exceeding 20 mm can be successfully bent in sections, the length of which corresponds to 3.5xh and more.

Such recommendations will be useful to those who are going to bend profile pipes with their own hands in order to make racks, awnings and various frame structures from them. In this case, however, it should be borne in mind that the possibility of high-quality bending of pipes is also influenced by their wall thickness. Products whose wall thickness is less than 2 mm should not be bent at all, and, if necessary, to create structures from them, use welded joints.

At home, it is possible to bend professional pipes that are made of carbon or low-alloy steels only taking into account certain nuances. After bending, such pipes can spring back and return to their original state, so the finished structures must be re-fitted according to the template. The amount of springback is characterized by such a parameter of shaped pipes as the plastic moment of resistance - Wp. This parameter is indicated in the accompanying documentation (the lower it is, the less the professional pipes will spring during the bending process).

Features of the most popular pipe bending methods

In industrial or home conditions, professional pipes are bent both with heating and in a cold state. Heating, which is produced with a gas burner, significantly increases the ductility of the metal, so that less effort is required to bend. Pipes of small cross-section can be bent without heating, since they already have good ductility.

Regulatory recommendations regarding the use of heating are available only for products with a circular cross section. So, it is recommended to heat pipes with a cross-sectional diameter greater than 10 cm before bending. In cases where it is necessary to bend square or rectangular pipes, it is worth focusing on your own experience or the advice of other home craftsmen.

1. Without preliminary heating, pipes are bent, the profile height of which does not exceed 10 mm.
2. If the profile height of pipes exceeds 40 mm, they must be heated before bending.

If you have a pipe bender at your disposal, you can easily cope with the task of cold bending pipes with a profile height in the range of 10–40 mm. In the absence of such a device, it is necessary to decide how to bend the pipe without a pipe bender, having previously carried out simple tests. They will help you determine whether to heat the pipe before bending or not. These tests are carried out as follows. One end of the pipe is clamped in a vice, and a pipe with a large internal section is put on the other. If with the help of such a shoulder it is possible to bend a pipe clamped in a vice, you can carry out this process without preheating.

The bending of pipes using various methods is well demonstrated by the training video, however, it will not be superfluous to study this process in detail in advance.

Bending of professional pipes with preheating

To bend a profile pipe with your own hands using a hot method, you must first fill it with sand. This will make the bend better and more uniform. Since you have to deal with hot metal, all work should be done with heavy canvas gloves. The bending itself, the implementation of which can be found in the video, is performed in the following sequence.

• Both ends of the profile pipe must be closed with plugs, which are made of wooden blocks. The length of such plugs should be 10 times the width of their base, which, in turn, should have an area twice the area of \u200b\u200bthe opening in the pipe, closed with their help.
• After adjusting the plugs to the inner section of the pipe, 4 longitudinal grooves are made on one of them, which are necessary to remove the gas that accumulates in the pipe when the sand filling it is heated.
• The section of the professional pipe that you plan to bend must be pre-annealed.
• Use medium grain sand as a filler for the pipe. If there is no refined building sand, you can take any, even from the children's sandbox, but it should be properly prepared. So, the sand is first sieved through a sieve with a mesh size of 2-2.5 mm to remove gravel and small stones from it, and the final sieving is performed on a sieve with a mesh size of 0.7 mm. Final screening is necessary in order to remove dust inclusions from the sand, which can be sintered when heated.
• Prepared sand must be calcined at a temperature of 150 degrees Celsius.
• Before filling with sand, one end of the pipe is closed with a plug, on which there are no gas outlet channels. A funnel is inserted into the second end through which prepared sand is poured in portions. In order for the sand to evenly and tightly fill the entire inner cavity of the pipe, when filling it, it is necessary to tap on the walls of the product using a wooden or rubber mallet.
• After the pipe is completely filled with sand, its second end is also closed with a plug.
• The area that will be heated for further bending should be marked with chalk.
• The pipe must be secured in a vise with a template or in a pipe clamp. In this case, it is important that the weld, if there is one on the surface of the product, is on the side. This requirement must be adhered to because it is undesirable to subject the weld seam to compression or tension.
• The section of the pipe, previously marked with chalk, is heated red-hot with a gas burner. After full warming up, the pipe is gently bent, without making any sudden movements, in one step, applying efforts strictly in the vertical or horizontal plane.
• After cooling the bent pipe, the result is compared with a template. If everything is normal, then the plugs are removed from the ends of the product and sand is poured.

This method, which is easy to implement at home, is best used in cases where a single angular bend must be formed on the professional pipe. Repeated heating of the metal can lead to a loss of its strength, and this cannot be avoided if you bend the pipe to use it as an element of an arched structure.

How to bend a pipe without preheating

You can bend the profile pipe yourself without preheating it, you can either with or without filler. The pipes do not require filling with sand or rosin, the profile height of which does not exceed 10 mm.

There is another technique, which involves the use of a spring with dense winding of coils instead of a filler, which is inserted into the inner cavity of the pipe and protects the walls of the product from deformation, as well as from excessive changes in their thickness during the bending process.

For those who need to bend profile pipes with their own hands, without first heating them, you can use the training video and the following simple recommendations.

1. It is possible to obtain the required bend on profile pipes using the simplest devices - a vice, mandrels, bending plates.
2. Can be used for products with a round profile. In this device, it is necessary to remake the working rollers, the shape of the recess in which must correspond to the profile of the pipe.
3. The most effective and accurate way to bend pipes is with the help that you can purchase or make yourself.

Pipe bending devices

The question of how to bend a pipe without a pipe bender will not cause difficulties if you use the simplest devices to perform this operation. Cold bending of pipes can be done using the following devices.

• In cases where it is necessary to bend a soft (aluminum) or steel pipe with a profile height of no more than 10 mm, a horizontal plate with holes is used, into which stops are inserted - metal pins. These pins are used to bend products according to the required parameters. This method has two serious drawbacks: low bending accuracy, and also the fact that it requires considerable physical effort.
• Products with a profile height of 25 mm are best bent using roller devices. The pipe is securely fixed in a vice, and the force is applied to the part that needs to be bent using a special roller. This device allows you to get a better bend, but also requires the application of physical effort.

An option, as they say, in a hurry. The long arm of this extremely uncomplicated device allows you to cope with rather thick pipes

To form a bend with a large radius of curvature on steel or aluminum professional pipes, stationary rounded templates are used, on which special clamps are mounted to fix the product. On such a device, the pipe is also bent manually, with effort laying it in the groove of the template, the shape of which exactly corresponds to the required bending radius.

Plywood and metal staples are all you need to make a bending template

Bending plate

To effectively bend steel or aluminum pipes at home, you can make a retrofit bending plate using the following guidelines.

1. The role of such a plate is played by a panel that is cut out of thick sheet metal.
2. The panel, made in this way, is welded to the post, which is installed on a special pedestal.
3. Two holes are drilled in the panel, which are necessary for installing the bolts that serve as stops for the profile pipe.
4. A special nozzle is installed on one of the stop bolts, with the help of which the bending radius is adjusted.
5. To ensure the alignment of the pipe sections adjacent to the bend, a metal plate is placed over the workpiece, fixed with bolts.

The moment you will not use such a modernized pipe bender, its pedestal can be adapted to perform various plumbing operations.

Mandrel bending

For bending at home profile pipe products, the wall height of which does not exceed 25 mm, you can make a special mandrel. For these purposes, it is better to use an overall workbench, on the surface of which there will be enough space for such a device. For selection optimal location the location of the element that fixes the bendable pipe, often located holes are made at one end of the workbench. A special template is responsible for ensuring the required bending radius of the professional pipe, which can be made from thick plywood or a metal corner, if you are going to use it often.

Profile bender application

Of course, if you have a significant amount of work on bending shaped pipes, it is better to make a special machine for this, the drawings of which are easy to find on the Internet. We will not discuss this issue here, since it is considered in more detail in the articles on the links below.

You cannot do without such a machine even if you need to bend pipes with a large profile section. The main working bodies of such a machine, which is characterized by wide versatility, are three rolls, two of which are fixed motionless, and by changing the position of the third, they adjust the bending radius of the product. As a drive of such a device, a chain transmission and a handle that the operator rotates are used.

Drywall has already become an integral part modern renovation... From this finishing material you can create various complex curly elements for walls and ceilings, as well as collect beautiful partitions. And everywhere you will need to bend the profiles, which are an integral part of the frame required for installing drywall sheets.

Therefore, the question "how to bend the profile?" Remains very relevant. If you do everything right, then in the end you can get exactly what you wanted.

Structures that are today made from drywall often contain a variety of curved and curly elements. They are especially often used when installing suspended ceiling slabs... Here you can find the following options:

• circles and ovals;
• squares and rectangles;
• various geometric shapes;
• waves, steps, flowers, sun and more.

Complex ceiling

In addition, bend metallic profile will be needed in other situations:

• installation of the arch. Here the profile should be bent into an arc;
• creating a single composition of walls and ceilings when curly ceiling elements flow onto the wall;
• installation of niches with curved elements;
• creation of a curly partition. It can be decorative, contain intricate curves and curls, or be straightforward.

Drywall arch

In any of the above situations, in order for the installation of drywall to proceed according to a given pattern, it is necessary to bend the profile. If you do the whole process correctly, then the subsequent installation of drywall sheets will be quick and easy, and the end result will delight the eye for many years.
As you can see, in almost any repair using drywall, bending profiles at different angles is a bearing necessity.
Bending of metal frame elements for gypsum plasterboard sheets is carried out according to the scheme. Therefore, in order to properly fold the profile, you need to read the corresponding instructions. We will cite it below.

What is required for the fold?

Working with metal profiles for drywall requires a certain set of tools. In order to bend metal elements and make cuts on them, as well as carry out their further installation, you will need the following tools:

• screwdriver;
• screwdriver;
• pencil, tape measure and building level;
• scissors for working with metal.

The list necessary materials this situation will include:

• metal profiles;
• fasteners. You will need self-tapping screws here.

Do not forget about protecting yourself during work. For example, you will need protective gloves to prevent wounds and scratches on your hands. In addition, protective goggles may be useful.
With such a set of materials and tools at hand, as well as taking all precautions, the procedure for shaping the profiles into the required shape will take you at most 20 minutes.

Getting started

At the moment, there are two main types of profiles: guides and rack.

Note! Only the profile guides can be bent, since the rack is used in order to support the bulk of the drywall structure.

In addition, when creating an arched opening, you can use a special arched profile.
Regardless of which framing element will be used, bending methods can be applied to all of them. It is necessary to bend the profiles before they are installed.

The element is bent due to the right angle cuts. The angle here should be 90 degrees, i.e. direct.
There are two options for the execution of cuts, which depend on which part will carry out the further installation of the frame element:

Side cut

• a 90 degree right angle cut is made on both sides of the profile. At the same time, the base of the element remains intact, which allows keeping the stiffeners intact. This method is great for making arches, semicircular elements or a circle;

Note! When using this method, you need to remember that the smaller the bend radius is needed, the more often you need to make cuts at an angle of 90 degrees.

• an incision is made at the base of the frame element. It is also necessary to cut one of the side sections of the profile. This method is used to make ovals or undulating elements.

Often, curly elements are made on the ceiling. Therefore, it is necessary to start forming them only after the frame of the first level has been assembled and sheathed with plasterboard sheets.
The procedure for forming a bend is as follows:

Side and base incision

• we apply markings on the first level of the frame or wall surface (in the manufacture of decorative shelves). This stage is mandatory, since it is impossible to make complex curly elements without markup;
• we take a guide profile and shorten it to the length we need;
• to shorten the element, you need to use metal scissors;
• then, depending on the cutting method, we make an incision at a right angle of 90 degrees. The cuts must go strictly parallel to each other, otherwise the element will not be able to bend. The pitch for the notches can vary depending on your needs. But often it is 5-8 cm;
• we make cuts where you need to make a curl or along the entire length of the profile;
• we apply the incised profile to the marking line;
• after that we fix the finished element, bending it along the way. You need to fasten with self-tapping screws. Here you should be extremely careful not to cut yourself on the sharp edges of a metal product;
• you need to fix the element sequentially, carefully giving it the desired shape.

Fastening the curved element

Note! Self-tapping screws are installed whenever a bend needs to be made. This will make the final design smoother.

When fastening a frame with curved elements, be sure to check each profile with a building level. It is necessary that all frame elements are in the same plane. Only in this way will you be able to make a flat surface of the ceiling or walls.
To give greater rigidity and strength to the figured element, we mount rack-mount profiles inside it.
After that, you can carry out the installation of drywall. The main thing here is that the pieces from a single sheet are cut exactly to the required size. If they don't fit slightly, they can be cut to length with a drywall knife.
By adhering to this instruction, you can correctly bend any metal profile and give it absolutely any shape.

Things to remember

So that the procedure for giving the elements metal frame the required form has passed correctly, it is necessary to adhere to some rules and recommendations,after all, only in such a situation will you be satisfied with the final result:

Fastening sheets

• there are several types of profiles that differ in purpose and size. You need to choose a frame element based on what kind of structure you plan to design;
• strictly follow the steps given in the instructions;
• you can use two types of guides to create shaped elements - "UW" and "UD". These elements do not have profiled collars. Therefore, it will be possible to make a couple of cuts on their sides without problems;
• in rare cases, the use of "CD" profiles is allowed. But only if they do not carry a load and are part of a small figured element. Cutting their sides at right angles will be a little more difficult;
• curvilinear frame structure must correspond to the parameters of the element that were applied to the drawing;
• installation of drywall on a curved profile should be carried out using self-tapping screws;
• the greater the bend of the profile, the smaller the step will need to be done when installing drywall. So you will achieve the maximum attachment of the sheets to the frame, without the formation of gaps;
• use the right tools, especially for the formation of cuts on profiles. This way you can avoid hand injuries and get the job done quickly.

Adhering to these rules, you can easily create unique curly plasterboard elements at home, giving your home a new, original look.
As you can see, there is nothing complicated in the bending of the metal frame elements. Shaping process plasterboard sheets much more complicated than profiles. You just need to follow all the points of the above instructions exactly and the result will be great!

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How to bend a pipe: more than 10 ways to do it yourself

Hello dear readers. Today I will tell you about how to bend a pipe without a pipe bender and with a pipe bender, and how to bend a polypropylene pipe. The topic is of considerable interest, since it is difficult to build a greenhouse, a gazebo or a canopy over the porch without bent pipes.

Why choosing the right flexion method is important

Incorrect cold deformation of the pipe, no matter what material it is made of, negatively affects the strength of the walls.

In the process of bending the pipe, the wall along the outer edge is strongly stretched and the material from which it is made becomes thinner. On the inner side of the pipe, with incorrect bending, the walls are crumpled and folds are formed, which negatively affect both appearanceand on the strength of the product.

In order for the pipe to be bent correctly, the walls must not wrinkle, while the stretching of the material on the outside must occur evenly.

How to achieve this result?

Methods for deforming pipes without compromising their strength

The choice of pipe bending method depends on the type of production materials. Three types of pipes are commonly used: metal, metal-plastic and completely plastic.

The first two categories can be bent to the required configuration. If the question is how to bend a polypropylene pipe, we use an industrial hair dryer with a special nozzle.

By installing the part on the nozzle, you can heat the plastic to a temperature close to the melting point, after which you can gently bend it. However, for working with plastic, I recommend using corner fittings with brazed or glue.

How to bend a metal pipe

Let's take a closer look at each of the methods listed in the diagram.

The hydraulic pipe bender is used to work with thick-walled steel pipes, which require a lot of force to deform.

Instructions for using the tool are as follows:

• The part to be deformed is located between the metal guides and the pressure rollers;
• Due to the hydraulic shift of the pressure rollers, the radius and the bend angle are set;
• the workpiece is rolled through guides and pressure rollers, due to which the required shape is obtained.

The use of a hydraulic pipe bender due to the selection of rollers of the required configuration allows you to work with workpieces with a traditional circular cross-section and with modifications.

To increase productivity, the hydraulic tool can be supplemented with an electric drum drive. As a result, you will have to set the necessary fold parameters and monitor the work process without exerting physical effort.

The manual pipe bender is similar in design to the hydraulic version. The main difference is that the position of the pressure rollers is not set hydraulically, but by muscular force.

Due to structural differences, the manual pipe bender is used to work with pipes with a small wall thickness and a small cross-sectional diameter. The main advantage hand tool is an affordable price and the possibility of making it yourself.

The use of external springs is important when working with thin-walled pipes with a round section of small diameter. To increase the efficiency of deformation, the metal walls in the stretch section can be additionally heated with a blowtorch.

• A special spring, selected according to the diameter of the section, is put on the surface of the pipe and pushed to the bend point, so that the deformation section is located approximately in the middle of the pipe;
• The area where the deformation is performed on the outside is heated by a blowtorch;
• The pipe is taken by hand from both ends and gently bent with effort to obtain the required angle and radius;
• After the metal has cooled down, the spring is removed.

Why do you need a spring?

Regardless of which spring you use, external or internal, it does not allow the pipe walls to deform unevenly. That is, the walls of the pipe at the bend section will follow the shape of the spring.

For this, special springs are made from hard stainless steel grades. In order for the spring to be easily removed after use, its surface is made smooth.

The use of sand backfill is an opportunity to give the pipe a more or less uniform radius and bend angle without strong crushing of the walls.

Using sand backfill, it is possible to bend only individual pipe sections, at the same time, it will not be possible to deform the already welded structural elements of the pipeline.

The deformation instruction is as follows:

• A plug is installed at one of the ends of the pipe;
• Sand is poured from the other end without heterogeneous inclusions;
• The open end is also sealed with a cork;
• At the supposed place of the bend, the metal is heated with a blowtorch until it turns slightly red;
• Grasping both ends, bend the metal pipe against the round pillar until the desired angle and radius are obtained.

Methods suitable for working with metal-plastic

Metal-plastic pipes differ from their metal counterparts in the lesser strength of the walls due to the smaller metal thickness. Therefore, to work with metal-plastic, you can apply the methods listed in the following diagram.

Let's consider the listed methods in more detail.

Application manual pipe bender crossbow type allows you to set the required angle and radius of the metal-plastic pipe.

Due to the lower degree of pressure, in comparison with the hydraulic analogue, it is possible to deform the metal-plastic product without the risk of damage to the thin walls.

If you need to set a small bend radius, you need to deform the metal-plastic gradually, moving from a large radius to a small one. Despite the fact that the workpiece will have to be rolled several times, its walls will remain intact.

The application of a steel spring is similar to that of metal pipe... But if a spring could be used on metal bigger sizethan the cross-sectional diameter of the pipe, then when working with metal-plastic the size must be the same.

We bend the workpiece gradually. In order to make it easier to remove the spring at the end of the bend, it is advisable to lubricate the adjacent pipe surface with machine oil.

The use of sand backfill is practically no different from the use of backfill when working with metal. Basically, the sand backfill acts as an internal spring that prevents the walls from crumpling.

Since metal-plastic is more plastic than a thick-walled metal product, we take the metal-plastic pipe for bending not by the ends, but closer to the deformation area.

Wire use is a form of pipe deformation using filler. That is, if the cross-sectional diameter is small, the pipe can be filled with wire cuttings at least 80% of the cross-sectional area. Then, holding the workpiece by the ends, gently bend it, having previously thrown it over a round post.

The only drawback of this method is the impossibility of making a bend with a small radius, since then it will be difficult to pull out the wire.

Working with shaped metal pipes

Finally, I'll tell you how to bend a square steel pipe with a grinder and a metal cutting disc available.

The instruction is as follows:

• At the place of the proposed fold on the inside, we mark the slots;
• We cut the pipe with a grinder so that the disc passes through the inner and two lateral sides and from the side the cuts look like small hollow triangles;
• We bend the workpiece along the cuts.

The smaller the bend radius, the larger you need to make the angle of each cut.

Output

Now you know how to bend a HDPE pipe and how to do a similar operation with metal and metal-plastic parts. For more details, watch the video in this article.

Any questions about the text? Ask them with in your comments.

July 25, 2016

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