... , GB/T9711, ASTM A53, A500, API 5L, 5CT, BS1387(Galvanized) Steel Grade: Q195-Q235, B, X42, X46, X52, X56, X60, X65 ... , X70,X80, H40, J55, N80 Size Range: OD 21.3mm-630mm,thickness 1.8mm-20mm Specification Table for API 5L ... .2 √√√√√√√√√√√ 508.0 √√√√√√√√√√√√558.9 √√√√√√√√√√√609.6 √√√√√√√√√√√ Electric Resistance Welding Steel Pipe