ERW Water Pipe
ERW Water Pipes Product Introduction. ERW (Electrical Resistance Welding) pipes are manufactured by cold forming of steel coil into a round cylindrical shape. In the initial times it was done with the low frequency A.C. current to heat the edges. ERW is produced from individual sheets or...Send InquiryChat Now
ERW (Electrical Resistance Welding) pipes are manufactured by cold forming of steel coil into a round cylindrical shape. In the initial times it was done with the low frequency A.C. current to heat the edges.
Standard and Steel Grade
API 5L- B (L245), X42(L290), X46(L360), X52(L360), X56(L390), X60(L415), X65(L450), X70(L485), X80(L555).
ASTM A 252-Grade 1, 2, 3
EN10219-1 : S235JRH, S275J0H, S275J2H, S355J0H, S355J2H,S355K2H
OD: 1/2" to 20" Thickness: 6mm to 25mm
API 5L, CE PED, CNAS, ISO 3183, ISO 3834, ISO 9001, ISO 14001, ISO 18001
BSW has big advantage about the steel pipe pile,especially for long length piling pipe.
ERW is produced from individual sheets or continuously from rolls of skelp. There are two important differences in the production of ERW pipe as versus CW pipe. ERW pipe is cold formed into a cylindrical shape rather than hot formed. An electric current rather than a flame is used to heat the edges of the strip for the fusion weld. Revolving copper discs serve as electrodes and raise the temperature to about 2600°F for effective welding. As in CW pipe, no extraneous metal is added; in fact, due to the extreme pressure of the rolls, steel is extruded on both the inside and outside of the pipe at the point of the weld. This is called flash and is removed on the O.D. by stationary cutters while still white-hot for A252 grades, and both the I.D. and O.D. for other grades. As in CW production, ERW pipe is subject to numerous finishing operations. ERW pipe is primarily used as API Line pipe for the transmission of gas and oil. It is also used for the transmission of water, under AWWA specifications, as piling and slurry pipe and in mechanical applications.
Edit by MS Linda Ma of KRM/BSW
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