whether its necessary to consider erw pipes as a seam pipe

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whether its necessary to consider erw pipes as a seam pipe..

Electric Resistance Welding (ERW) pipe is manufactured by rolling metal and then welding it longitudinally across its length. Seamless pipe is manufactured by extruding the metal to the desired length; therefore ERW pipe have a welded joint in its cross-section, while seamless pipe does not have any joint in its cross-section through-out its length.So ERW pipe can considered as seam pipe.

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