Pipe Machining

Pipe Machining

Pipe materials may be used to make a number of components for a broad range of industrial applications. Of course, a succession of shaping processes must be done to the material in order to change a basic pipe into the finished component while attaining the necessary outcomes in terms of design parameters.

Pipe machining is one of those forming operations, and it relates to the numerous procedures used to cut, size, and shape raw pipe material into the appropriate shape. Pipe end threading, pipe end grooving, pipe end swaging, pipe end beveling, hole drilling, hole punching, pipe bending, cutting, and tapering with fold are some of the most frequent pipe machining or finishing operations used on steel materials.


Pipe End Machining & Finishing

- Pipe End Grooving

Grooving is a common procedure for preparing pipe material for mechanical joining. It is a cold-forming procedure that involves radially displacing a tiny piece of the pipe wall. The end of the pipe is put between the roll set of a grooving machine to create this displacement. After the roll set is closed, the pipe is compressed and rotated to create the groove around the outer diameter, leaving a circumferential recess on the outside and an indent on the interior.

- Pipe End Swaging

Swaging pipe material is a popular shaping procedure used on pipes to modify the dimensions of the profile by driving them into dies as a cold or hot working process. To accomplish this, several techniques such as extrusion via a die and the use of two or more rotating dies from the outside are utilized, both to shrink the diameter of a segment or the complete item.

This procedure is often used to create collars on pipes having a circular section, also known as collar swaging. Collars are used to provide locking force to a non-threaded item, such as a bolt, or to augment the locking power of a threaded part.

- Pipe End Threading

A single tube length is typically less than 14m, however for certain steel pipes, the length needed often surpasses this. Drilling depths in geological and oil drilling are often more than 1000 meters, with the deepest reaching 7000 meters; used for carrying oil, gas, water, alkali, and mineral conveying pipe may extend for several kilometers or even hundreds of kilometers. As a result, a pipe with coupling must be connected at the two ends of the steel pipe threading. Threaded connections need strong connection strength and excellent airtightness to avoid steel pipe fracture and conveying item leakage. To suit the demands of a range of uses, the world has produced a diversity of thread shapes.

  • Dome Triangular Thread is distinguished by easy thread processing, but the connection strength is low due to unequal stress and distortion of the screw thread. Poor sealing performance is produced by only sealing on one side of the thread.
  • Buttress Thread, which provides high thread accuracy, a high processing need, and high connection strength. The side and top of the screw seal provide pretty good sealing performance.
  • The direct Connection Type is characterized by the necessity for bigger pipe ends, one end of the external screw thread and the other end of the internal screw thread, making processing more complex. The connection strength, on the other hand, works well due to the high accuracy of the screw thread.

- Pipe End Beveling

Pipe beveling is the formation of an angle between the edge of the end of a pipe or tube. When the pipe end is formed at an angle, it is referred to as a bevel end or beveled end. Pipe beveling is an important step in the pipe joining welding preparation process. Because the quality of the beveled pipe has a direct impact on the quality of the welding, proper pipe preparation ensures the best possible weld joint. Beveling, in addition to welding, can be used to deburr the cut pipe ends for aesthetic and safety reasons.

Pipe Body Machining & Finishing

- Pipe Tapering

Tapering is a pipe-making procedure that gradually reduces the diameter of the pipe. It is possible to do this using a two-die rotary hammering process and swage presses. One significant benefit of employing swage presses to make tapered pipe material is that, as with any other swaging process, there is minimal material loss and the metal structure stays mostly unchanged.

Other essential features of this pipe machining method include the ability to expand the length of the pipe and accomplish some wall thickening.

- Hole Punching

Hole punching is a shearing (guillotining) technique used to make holes in steel materials. Hardened tools with sharp edges and applied force are used in hole punching to shear off undesirable material. Electrical, hydraulic, pneumatic, or even manual force can be applied. Hole punching tools come in a range of forms and sizes.

- Hole Drilling

Drilling isn’t a shearing operation. Drilling is the process of removing material by using a drill bit. A drill bit is a long, sharp instrument, sometimes having flutes, although it can have a variety of properties depending on the purpose. As pressure is given to the drill bit, it spins fast, and the cutting blades remove a small amount of material with each revolution. The force used to a drill is typically applied using a drill press; however, alternative gear, including hand drills, can be used.

- Pipe Bending

Tube bending refers to any metal forming method that is used to permanently shape pipes or tubes. Tube bending can be form-bound or freeform, and it can be heat-supported or cold-formed.

To mold the work item into the shape of a die, form bound bending processes such as “press bending” or “rotary draw bending” is utilized. Straight tube stock may be bent with a bending machine to make a range of single or multiple bends and mold the item into the required shape. These methods may be used to create intricate forms out of several types of ductile metal tubing. Because freeform-bending procedures, such as three-roll-push bending, shape the workpiece kinematically, the bending contour is not reliant on tool geometry.

In most cases, the round stock is utilized in tube bending. Square and rectangular tubes and pipes, on the other hand, maybe bent to match task demands. Other elements that influence the bending process include the wall thickness, the equipment and lubricants required by the pipe and tube bender to optimally form the material, and the many applications for the tube (tube, pipe wires).

- Pipe Cutting


Hot Cutting

Hot cutting is done with a thermal torch (plasma or oxyfuel) positioned on the final axis of a multi-axis machine. The electric motors power the axes of the multi-axis machine, which are coordinated to produce a route for the torch and pipe that yields the required profile. Axes are synchronized either physically (through cams, levers, and gears) or electronically (by microprocessors and controllers).

Cold Cutting

Where high temperatures and ignition sources are not desired, air- or hydraulically-powered pipe cutting machines are employed. These consist of a clamshell or chain-mounted cutting head that holds a tool steel and a feed mechanism that moves the tool a predetermined amount per rotation around the pipe. Styled tools can cut and/or prepare the bevel for welding in a single or many passes.

Because of the difficult cuts and profiles required in their respective sectors, offshore, pipe processing, ship building, pressure vessel, structural, and mechanical contracting manufacture are popular. Pipe work, offshore jackets, industrial steel constructions, stadiums, cranes, nozzles, and pipe laying stingers are some popular pipe cutting uses.

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