ERW Pipe

ERW pipe means electric resistance welded pipe, and it is a resistance welding
by 10-500 kHz of high-frequency current.

The raw material of the ERW steel pipe is hot rolled steel coil made of steel
billet, and the usual material is Q195, Q215, Q235, Q355 in China ERW pipe
grade, which are same material with S195, S235, S355 in Europe, and SS400 in
Japan. ERW steel pipe suppliers will cut the steel coil into strips first, the
strip width is according to the perimeter of the pipes and then shaped by mold,
welding, cutting, straightening, inspecting, end smoothing, packing, and final
storage or dispatch.

The pipes are used widely in construction and infrastructure, such as
scaffolding, water and gas delivery, fire control system, oil and heat
delivery, and other low-pressure liquid delivery. Generally, the length of
pipes produced by the erw steel pipes manufacturers is 6m, which can be
determined according to the requirements of the buyer.

Electric Resistance Welded Steel Pipe Flow Chart
Unwinding - Leveling - Shear Butt Welding - Piston Storage - Second Leveling -
Rough Forming (Finishing) - High Frequency Welding - Cooling - Sizing - Eddy
Current Testing - Fixed Length Sawing - Straightening - Milling Head - Water
Pressure Test-check sorting-packaging-storage
Specifications of ERW Steel Pipe
Standard: BS 1387-1985, ASTM A53, ASTM A513, ASTM A252-98, JIS G3444-2004
STK400/500
G3452-2004, EN 10219, EN 10255-1996, DIN 2440, GB/T13793-2008
Material: Q195, Q235, Q275, Q345
Specification: 1/2”-8” (OD: 21.3mm-219.1mm)
Thickness: 1.8mm-6.0mm, +/-5% tolerance.
Surface treatment: Galvanized, oil coating,
Pipe end: Plain, groove, threaded with plastic caps or sockets.
Packing: Bare packing/bundle packing/crate packing/wooden protection at both
sides of tubes
Transportation: By 20/40FT containers or by bulk vessels as per condition

ERW Steel Pipe's Advantages:
ERW pipe means "high-frequency resistance welded steel pipe", which is
different from ordinary welded pipe welding process. The weld is formed by
melting the base material of the steel strip body, and its mechanical strength
is better than that of general welded pipe.

ERW welded pipe has the characteristics of high production efficiency, low
cost, material saving, and easy automation. Therefore, it is widely used in
aviation, aerospace, energy, electronics, automobile, light industry and other
industrial sectors, and it is one of the important welding processes.

Hebei Tianchuang Pipe Co., Ltd is a china steel pipe factory,we have electric
welded pipe,erw pipe grade and erw steel pipe specifications,contact us now.

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