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SSAW steel pipes Specifications 1.Name:SSAW STEEL PIPE 2.Standard:API 5L PSL1, ASTM A53, ASTM A252, SY/T5037, SY/T5040, DIN 30670 3.Material:ASTM A252 GR.1—3,SS400, ST37, ST52, Q235, Q345, API GR.A, ...