... service 3 Reasonable price 4 Various styles Detailed product description Carbon Steel Pipes 1. Standard:GB5310-2008, GB6479-2000, ASTM, ... -111, DIN 17175, GB8163-2008, GB9948-2006, GB8162-20082. Carbon Material:20#, 35#,45#,CK45,ST45,ST55,SA106B3. Alloy Material ... (mm)Fluid Pipe20Q345GB/T8163-19998-630×1.5-40(mm)Structural Pipe1020354516Mn Q345BGB/T8162-19996-610×1.5-40(mm) ...