... Authority to use the Official API Monogram. seamless steel pipe API A106-5L 5CtOur products are made of 10#, ... 20#, 35#, 45#, ST45, ST55, CK45, Q235 (B, C, D, E), Q345 (B ... , A335P22, SA-213 T11 T22 T12, 10CrMo910, 12Cr2MoWVTiB (Steel Mortar102), 15CrMo, 35CrMo, 42CrMo, Cr5Mo, 12Cr1moV, 10MoWVNb, ... us for more information. API A106 seamless steel pipe 5L 5CT