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Spiral steel pipe is an important steel pipe in the project construction. It is forme...
Standard API-5L, SY/T5037-2012 Grade : Q235B,Q345B,SS400, S235JR, X70 Thickness: 6...
Standard: GB3091-2015, BS1387-1985, ASTM A500 GRADE A,B,C, ASTM A795, ISO65, ASTM A53...
Standard: GB6728-2017, ASTM A500 GRADE A, B,C, EN10219 Grade: Q235B,Q355B,SS400,...