... : 1 Standard: GB/T8162 ASTM A53, ASTM A106, ASTMA519, ASTMA252, DIN1629, JIS G 3441, EN 1021 GB/T8162 Structural Seamless pipe ... :1 Standard: GB/T8162 ASTM A53, ASTM A106, ASTMA519, ASTMA252 ... East and West Europe, South and southeast Asia, Australia, Africa 15 Certificates :API; ISO9001:2000Our company is specialized in manufacturing and ...