How to cut straight a large diameter pipe

For industrial use

Such equipment is used in industries where the volume of work is large or it is necessary to cut pipes of large diameter. In order to cut exactly, use:

  • Lathe. Suitable for high-precision cutting of workpieces, chamfering, making shoulders, transitions of diameters and other shaped machining. Allows lathe and threading, both internal and external. The length of the part is limited by the overhang of the machine head. Diameter. overhang of chuck jaws.
  • Tape machines. They are used to cut a large diameter pipe without removing it from a trench or collection point. They also work on deformed products.
  • Disc cutting machines. Highly automated machine with pendulum saw and workpiece feed mechanism. Often included in production mowing lines, used for high-performance cutting of rolled products into equal pieces.
  • Manual disk installations. Mobile equipment is used to cut the rolled metal exactly right at the installation site. Equipped with a multifunctional clamp that allows you to securely fix products of different diameters and cut them evenly without damaging the edges. The rotary work table allows you to cut exactly at an arbitrary angle. The most advanced models are equipped with an orbital welding system. This allows you not only to cut, but also to connect the segments.

straight, large, diameter, pipe

Thermal applications

In addition to mechanical, thermal methods for cutting pipes are widely used. Here, the tool is a gas torch (propane or acetylene) or an electric arc welder. Even the thickest largediameter pipes are subject to the torch. The performance is also quite high. In addition, only these methods provide exceptional mobility. you can cut the pipe in a trench, basement. in places where a high-performance stationary machine simply cannot be dragged and connected.

It should be noted that thermal methods do not allow achieving high accuracy, and it is also not always possible to cut off exactly. However, in a number of applications, such as operational repair of heating mains or main pipelines, it is not required. After a thermal cut, the resulting edges have to be additionally processed with mechanical tools, the cut line should be leveled and the bevels should be removed to the design values.

The thermal cutting method is also used when working with polymer tubular products. In thermal guillotines, the cut is carried out by an oblique thin cutter heated to a high temperature, sliding in guides.

The units can also cut at an angle and very smooth, but are only suitable for working with soft materials with a low melting point.

Oblique cut at 45 °

Cutting the end of the pipe exactly at 45 ° is possible without the use of complex tools. It is enough to use a locksmith’s ingenuity. You will need to do the following:

  • Cut a piece of paper into a square.
  • Fold diagonally. Learn a right-angled isosceles triangle.
  • Wrap the workpiece with a sheet so that the leg of the triangle is perpendicular to the axis, and the hypotenuse forms an ascending spiral.
  • Secure the sheet with tape.
  • Fix the workpiece and cut along the oblique edge of the sheet. Turns out at 45 °.

There is another popular method. The end of the workpiece is immersed in a container with liquid at the required angle. You need to cut off along the border of the wet and dry areas.

If you want to cut not perpendicularly, then it is better to use an old carpentry tool. a miter box.

This is a U-shaped template, in the side walls of which slots have already been made at specified angles. The pipe is pressed against the wall of the miter box farthest from the master and pressed there with a hand or a hand clamp. The hand saw blade is inserted into the corresponding grooves and sawed. If necessary, cut at a different angle, you can make additional cuts in the walls of the miter box.

Simple tooling for cutting

The versatile pendulum circular saw is perfect for cutting straight and angled thick-walled pipes of large diameter, both round and rectangular in cross-section. Such devices work in the procurement areas of small industries and on construction sites where it is required to evenly cut a large amount of reinforcement to size.

The circular saw, together with the electric motor, is fixed on the pendulum arm and can be brought into the working area with great accuracy and then cut in one plane.

Advanced devices are equipped with an articulated arm that allows you to change the direction of the cut. In the models of the lower and middle price segment, the orientation of the mowing line of the cut is carried out by means of a rotary table equipped with clamps for reliable fixation of the workpiece. In addition, the table can be tilted to the side up to 45 °. The turntable and lifting mechanism are equipped with protractors that allow you to set the angle with an accuracy of a degree.

For reliable fixation of the pipe at a given angle, a clamp and two steel corners with a side close to the diameter of the pipe are used. The short corner is fixed on the rotary work table using its standard screw clamps. Fastening and cutting process step by step:

  • Set the turntable to the required cutting angle and secure it.
  • Lay the pipe between the corners and tighten them with a manual clamp so that the marked cutting line remains free.
  • Start the engine.
  • After a set of revolutions, smoothly bring the disc to the metal surface and cut the workpiece evenly. At the beginning and end of the cut, when the cross-section of the metal being cut is maximum, you should not apply large forces to the handle of the pendulum.
  • high performance, even with thick walls
  • even and smooth cut, requiring minimal cleaning and reworking with a file
  • no need to build patterns.
  • applicability to small and medium diameters
  • high cost of the machine
  • low mobility
  • high power consumption and noise
Read more:  How To Cut Pipe At 45 Degrees Angle Grinder

How to cut a cast iron pipe

Cast iron as a material has its own specifics and differs from steel alloys in a number of physical and mechanical characteristics. With high strength, cast iron is a very fragile material.

A cast-iron pipe is marked in the same way as a steel pipe. Before starting work, wooden blocks should be placed for support. An angle grinder with a cut-off wheel needs to make a shallow cut around the entire circumference. Next, a chisel inserted into the incision must be hit with great force. The product will split straight along the cut line.

If an angle grinder is not available, you will have to make a circular cut with a hacksaw for metal.

Miter box for cutting pipes

Carpenters have long used a simple, but very useful device to cut the ends of bars, rectangular, round and shaped, evenly at an angle. A carpenter’s miter box is good for sawing off plastic or non-thick metal pipe.

You can use a ready-made one, or you can make a miter box with your own hands. Its advantage is that it can be made exactly to the size of the pipe. For manufacturing you will need:

  • Cut a plank with a length of 40-50 cm and a width equal to the pipe diameter.
  • Cut two boards of the same length, but wider by the thickness of the first board.
  • Assemble the boards on self-tapping screws, attaching the side boards to the base so that you get a U-shaped gutter.
  • In the center, mark and make vertical cuts in the side boards to the base so that a straight line drawn through them forms angles of 90, 60, 45 and 30 ° with the longitudinal axis of the structure.
  • Make cuts at different angles if necessary.

It is better to make the side walls of more durable wood. this will extend the service life of the equipment.

Such a miter box not only defines and helps to maintain the correct cutting line and cut straight. It also serves as a means of securing the pipe. It is enough to hold the pipe with your hand together with the miter box. For each diameter, you will have to make a separate tooling.

During operation, the slots in the side walls are also subject to wear. It is necessary to ensure that the hacksaw blade runs in them with minimal backlash. In case of wear, you can saw new slots parallel to the old ones, at least 3 centimeters away from them, or replace the side walls.

This miter box has the following advantages:

  • simplicity of design and manufacture
  • cheapness
  • the ability to make tooling for any diameter and required angle
  • inconvenient to work with large diameters and wall thicknesses
  • binding of each rig to its own diameter
  • only compatible with metal hacksaw

Used tools

At first glance, this operation is not complicated. cutting pipes in practice reveals a lot of nuances and pitfalls. It’s not so easy to cut the tubes straight:

  • Thin-walled.
  • Large diameter.
  • Bevel.

It is very important to select the appropriate cutting method and special equipment for each specific case. It is subdivided into individual, household and industrial.

Hanging pieces of workwear

I think it’s not even worth explaining, what could be fraught with. Buttons are fastened, holes are sewn, fringes on the legs, sleeves are not.

Transporting discs

Usually the entire tool is in one box, be sure to set aside a separate compartment for disks that does not allow impacts on them. Which can lead to damage that is not visible to the eye.

Techniques for cutting pipes at an angle

Non-perpendicular cutting techniques depend on the material being cut. Some techniques are suitable for plastic or thin copper. materials that are ductile and easy to work with. Thick steel will require a more serious approach.

How to cut a profile pipe straight across

Most often in the household, a rectangular or square pipe metal profile with a wall thickness of no more than 3 mm is used, and cutting into separate segments is necessary when carrying out work on the assembly of welded frames.

To properly cut the pipe, use additional devices to mark and mark the mowing line of the cut, some of the devices act as a support edge for the cutting disc.

Glass cutting

The angle grinder has no problem cutting glass. For this operation, you can use the cheapest ceramic wheel. A light contour cut is made and then deepened. The cut glass is laid out on the edge of the table and broken.

Cutting glass pipes with an angle grinder can be seen as an example of cutting a regular glass bottle. The bottle is placed in an open vise or placed between two wooden blocks. Turning it little by little, make a cut with an angle grinder. The bottle is rotated until the unnecessary part simply disappears.

How to cut a profile pipe straight

You can cut a profile pipe in much the same way, but here it will be easier to use a square. The device is alternately applied to each side, for which the cut element will need to be rotated, and the markings are applied. Next, the pipe must be fixed immovably and you can start work.

Any suitable tool can be used for sawing. If you have to cut a lot of pipes, then it is advisable to make full-fledged templates from scraps. In this case, the measuring and marking work will have to be done only once.

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Methods for cutting large diameter pipes

There are a number of reliable tools available for cutting large diameter pipes such as sewers. Next, we will consider some of them in detail:

  • An angle grinder is an inexpensive and affordable option, but it is not considered the safest when working with such materials. Once you decide to use this method, then be careful and use protective equipment.
  • A roller machine (pipe cutter) is such a tool adapted for such manipulations. The device is attached and material removal begins. The clamping force is adjusted using mechanical devices. It is important to note that the models of the machine differ in shape, therefore, before use, consider the ratio of dimensions to the pipe.
  • Flame cutting is the most popular option for cutting larger diameter pipes, sheet metal. The cut occurs due to the action of a high intensity flame, the metal melts and leaves the cut zone with a gas flow. This method is convenient and effective.

A quick way to cut a pipe lengthwise with an angle grinder:

  • Focus on the markup.
  • Use for such a case the painter’s thread, which has found distribution when marking walls.
  • Before starting work, fix the pipe and with small movements, carefully saw the pipe.
  • Better not to rush, but delicately and slowly process the parts of the pipe, so the cutting disc does not jump off the marking lines. Remember safety.

Thin-walled pipes are made of non-ferrous metals: aluminum, copper. Such work should be done delicately, since there is a high probability of material deformation. Fillers such as sand are used for cutting. Actions can be carried out using an angle grinder, a special machine.

Summing up, we emphasize that cutting metal pipes is a complex process, but anyone who wants to enhance it can enhance it. With the advice of professionals, you can easily cope with cutting pipes of various sizes and materials.

Also remember to file or sandpaper the edges of the pipes after cutting. And the most important thing to remember when starting such actions is safety precautions. When starting work, wear a special suit (casing), mask or goggles.

Hands should also be reliably protected from sparks, so use thick gloves.

Thermal applications

In addition to mechanical, thermal methods for cutting pipes are widely used. Here, the tool is a gas torch (propane or acetylene) or an electric arc welder. Even the thickest large-diameter pipes are subject to the torch. The performance is also quite high. In addition, only these methods provide exceptional mobility. you can cut the pipe in a trench, basement. in places where a high-performance stationary machine simply cannot be dragged and connected.

It should be noted that thermal methods do not allow achieving high accuracy, and it is also not always possible to cut off exactly. However, in a number of applications, such as operational repair of heating mains or main pipelines, it is not required. After a thermal cut, the resulting edges have to be additionally processed with mechanical tools, the cut line should be leveled and the bevels should be removed to the design values.

The thermal cutting method is also used when working with polymer tubular products. In thermal guillotines, the cut is carried out by an oblique thin cutter heated to a high temperature, sliding in guides.

Reliably Make Square and Straight Cuts on Large Diameter PVC Plumbing Pipes

The units can also cut at an angle and very smooth, but are only suitable for working with soft materials with a low melting point.

Cut the pipe exactly

Prepare yourself a template that will come in handy in the future and save time. It is better to do the action with an angle grinder, so the cut will be smoother.

When working with a cast iron pipe, keep in mind that it is a brittle material. Therefore, we will point out a method with which it will be possible to cut such a metal without damage.

Before starting work, make notes for the cut, just like with steel pipes. Place a piece of wood for support. Run an angle grinder around the circumference of the pipe making small cuts. Then take the chisels, insert into the groove and hit hard with a hammer. Note that bakelite-based cutting discs are used to cut cast iron pipes.

If you do not have an angle grinder at hand to cut a cast-iron sewer pipe or other purposes, use a metal hacksaw, chisels or special pipe cutters.

Exact Tools P400 PVC Cut and Bevel

Cutting a gas pipe is dangerous, so it is best to entrust it to professionals. But if you are confident in your strength, then to cut the metal, take an angle grinder, welding, hacksaw, gas welding.

  • Shut off the gas riser before work. Then release the rest of the gas from the pipe. To do this, set fire to the gas in the burners and wait for it to go out.
  • After the actions taken, cut. Using the welding method, the metal base burns out when exposed to high temperature. The result is fast and effective. But remember that cutting or rooting gas pipes again requires experience.

ways of cutting metal pipes

But the cut can also turn out a little oblique on sewer pipes with a diameter of 50 mm. Here, too, it is advisable not to cut immediately, but turn the pipe 2-3 times. If you need to saw off a pipe with a diameter of 100 mm or more, then first you need to drill a number of holes with a thin drill (2.5-3 mm) in order to insert a jigsaw file into the pipe.

Bevel cutting

In this case, we will show you how to cut the pipe at a 45º angle. Marking will be needed in this case too (for more details: “How to cut a pipe at an angle. marking options for a round and shaped pipe”).

To apply it, you need a square sheet of paper, which must be folded diagonally. The resulting triangle is wrapped around the pipe and fixed. This will create an angle of 45º.

Read more:  Which Trimmer Is Better Straight Or Curved

You can, of course, try to lower the pipes at the desired slope into the water, then the border of the wet surface will serve as a markup. However, it is best to use a special device for corner cutting. a miter box.

In shape, the miter box looks like an inverted letter “P”. Pre-made holes with different angles have already been made in its opposite walls. It is enough just to place the pipe inside the device and cut it by running a hacksaw along the selected grooves.

Thus, it is quite simple to make an even cut of a pipe from any material on your own. In this matter, there are only a few tricks that will allow you to quickly and efficiently carry out all the work and build yourself the desired object for your farm or summer cottage. Note also that it is better to check the measurements several times before starting cutting, because you can accidentally make a mistake and spoil the material, while incurring additional financial losses.

If the beginning of the strip coincides with the end, then you have glued the tape correctly. If the beginning of the strip of adhesive tape and the end do not coincide by more than 2 mm, it is better to re-glue it. The adhesive tape should be glued evenly, without wrinkles and distortions. The wider the tape, the more accurate the resulting line will be.

Before cutting the pipe, it is advisable to fix it in order to make it easier to cut. If you do not have a carpenter’s workbench (and where does it come from in an ordinary apartment), you can screw two wooden blocks to an old table or to an old stool so that a pipe fits between them. In this case, the pipe will still need to be held, but it will not ride. If you need to make a lot of cuts, then it is better to make special bars and press the pipe with them:

Now you can cut, you can do it in the following ways:

How to cut a pipe straight with an angle grinder?

When dealing with construction or plumbing tasks, you need to know how to cut the pipe straight with an angle grinder. In the article, we will consider quick and easy ways of how to properly cut a pipe with an angle grinder so that the result is perfect.

Pipe cutting at an angle of 45 and 90 degrees

If you need to cut the pipe at an angle of 45 degrees, which is more often required when laying water, heating pipes. Steel, cast iron pipes that are cylindrical in shape are often used. In installation work, rectangular or shaped pipes are used. However, you should properly cut the pipe with an angle grinder, so that later it can be easily connected. Therefore, you should carefully mark the pipe.

Some craftsmen try to mark the place of the cut using a tape measure, but we warn you that the result is likely to be negative. And for a positive result, consider the following professional recommendation.

Take a sheet of paper or cardboard, preferably A4, fold it diagonally and wrap it around the pipe where you plan to cut it evenly.

The edges of the paper should be exactly aligned with each other. And the side of the paper that is closer to the end of the pipe was perpendicular to the axis. Then mark the cut line in a circle.

If you need to cut exactly at an angle of 90 degrees, then solve the problem quickly using paper or masking tape again. Wrap around the pipe so the ends match. Make even lines and saw off.

Masters advise using a square when cutting a profile pipe. To do this, apply the square in turn to the sides, and turn and mark with smooth movements. After action, fix the pipe and cut.

How to cut a pipe straight

What tools are used to cut pipes

Tools for home and semi-professional use

In everyday life, we are constantly faced with the need to lay pipelines from various materials, whether it is water supply, sewerage, heating, installation of cable ducts, or even the construction of frame structures in a house or in the country. This article will tell you how to cut the pipe exactly for certain purposes, if you do all the work yourself, that is, it provides detailed instructions for all technological operations. Also, let’s talk about the variety of tools for hobbyist or industrial use.

Pipe cutting technique

Immediately, we note those cases when work should be done to install the heating system.

In this situation, you will need to purchase a special pruner. it will allow you to cut the pipes exactly without deforming them, and its cost is low. But simpler work can be performed with simple improvised means.

What tools are used to cut pipes

At first glance, it might seem that pipe cutting is a fairly simple process that is not worth mentioning. However, this is not quite true. It’s one thing when you don’t need precise, even cuts at an angle of 90º or otherwise, since there will be no further welding or joining of the ends. And it is quite another matter when you need to make an absolutely accurate cut. Note that if you need to cut oblique ends with an exact angle, you should consult with experienced craftsmen.

Separately, it is worth mentioning pipes with a large diameter, when joined, a cut of exactly 90º should be ensured. Be that as it may, all these operations are performed using special equipment.