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Widely used in water transmission, gas & oil conveyance, chemical pipe network and steel structure in architecture industry. ERW Line Pipe. Outer DiameteOD219.1 610.0mm(8 5/8 24”).
Green pipes, raw steel tubes, are processed through a number of steps to make them into drill pipes. First, the walls of green pipes are thickened by a process called upsetting through which a pipes exterior surface is pushed inward. Next, the pipes are threaded and receive a strength enhancing copper plating.