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ERW pipes

ERW pipes, also known as Electric Resistance Welded pipes, are pipes that are made by welding the joint of two metal plates or sheets with the help of an electric current passing through the metal.

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Is high frequency welded pipe the best way to weld steel pipes?

Steel pipes can be divided into two categories according to the production method, one is seamless steel pipes, the other is welded steel pipes, and welded steel pipes are straight seam welded pipes.

The technological development process of ERW steel pipe

High-frequency welded steel pipe (ERW) is the use of the skin effect and proximity effect of high-frequency current after the hot-rolled coil is formed by a forming machine.

Three production processes of welded pipes

The above has introduced the three process-related contents of welded pipes.

Flattening test performance of ERW pipe

Flattening and cracking of ERW pipe welds are caused by insufficient weld strength, toughness or ductility.

Flattening test performance of ERW pipe

Flattening and cracking of ERW pipe welds are caused by insufficient weld strength, toughness or ductility.

Quenching treatment of ERW pipe

ERW pipe is a general term for electric resistance welded steel pipes, and straight seam high frequency electric resistance welded pipes are referred to as ERW

Research on welding bars of ERW pipe

Steel pipes often need to be flattened, bent, punched, pressed, etc. in use.

Application of ERW pipes in transporting gas

ERW steel pipe used for transporting gas and liquid objects such as oil and gas, could meet the low and high pressure requirement.

How to conduct ultrasonic flaw detection for ERW steel pipe?

ERW pipe is made by using the skin effect and proximity effect of high-frequency current to rapidly heat the edge of the tube blank to the welding temperature, and then extrude and weld it.

ERW steel pipe quality assessment process

The quality assessment process of ERW pipes includes online non-destructive testing, metallographic inspection, flattening and flaring destructive tests, and hydrostatic testing.