• Size

    2.375” through 24” OD

  • length

    up to 80 feet

  • SPEC

    A-252 Grade 1, 2, 3; API5L Grade A & B; and API5L X42 – X70.

Electric Resistance Weld pipe is normally produced in sizes from 2.375” OD through 24” OD. ERW is produced from individual sheets or continuously from rolls of skelp. There are two important differences in the production of ERW pipe versus Continuous Weld pipe. ERW pipe is cold formed into a cylindrical shape rather than hot formed. An electrical current is used to heat the edges of the strip for the fusion weld, while Continuous Weld pipe uses a flame. Revolving copper discs serve as electrodes and raise the temperature to about 2600°F for effective welding. As in Continuous Weld 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 by stationary cutters while still white-hot.

As in Continuous Weld 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. Any ERW pipe used for the transmission of water, meets all American Water Works Association specifications.

ERW pipe is most commonly found with these specifications: A-252 Grade 1, 2, 3; API5L Grade A & B; and API5L X42 – X70. ERW pipe is available in lengths from single random to 80 feet. ERW pipe is available with square ends or beveled ends for welding, threaded, coupled and victaulic grooved. Surface finishes are available in black, bare, or with various protective coatings.