Standard: API 5L PSL1, ASTM A53, ASTM A252, SY/T5037, SY/T5040, DIN 30670
Material: ASTM A252 GR.1—3，SS400, ST37, ST52, Q235, Q345, API GR.A, GR.B
Specification: OD: 219.1mm-2320mm
Wall thickness: 5mm-24mm
Surface treatment: Galvanized, 3-LAYERS PE, FBE, lacquering, varnishing