SEAMLESS STILL PIPE: API 5L ASTMA 53
Welded steel pipe are generally steel pipe made out of skelp (flat coiled ribbon plates) bent or formed to be submerged arch welding electronically to form a hollow pipe. The inner wall of the welded pipe has welding ribs. Welded steel comes in: ERW steel pipe, LSAW steel pipe and SSAW steel pipe. These are long hollow Steel pipe used for conveying fluids, oil, natural gas, water, gas, steam, and also used for many other applications.