Product Description

Product name: ERW steel pipe, Electric Resistance Welded Steel Pipe



Outside diameter: *1.****0mm
Wall thickness: 1.***0.0mm
Length: ***0m
Standard 
API 5L, API 5CT, ASTM A**2, EN******1, EN******2, EN******1, EN******2, GB/T***1.1, GB/T***1
Material Grade 
GR.A, GR.B, X*2,X*2,X*0,X*5,X*0,L**5,H*0,J*5,K*5 S**5T, S**5JRH, S**5JOH, ST*3, ST*2,Q**5,Q**5B, and so on.
Package details 
Bundles wrapped with strong steel strip and plastic cap, or we can also accord to customer requirement.
Electric Resistance Weld Pipe
​
Electric Resistance Weld pipe is normally produced in sizes from 2 3/8 inch OD thru *4 inch OD.
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 ***0°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 A**2 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.