... Pickling seamless carbon steel pipe 1. Thickness: 2-35mm, OD: 18-406mm 2. Material: 20#, 45#, 12Cr1MoV 3. ... pipe 1. Powerful supplier of seamless steel pipe 2.Certificate:ISO9001:2008, API ,KR Approved, SGS ... BS, DIN, GB, JISSteel Grade: ST 52,ST 52.4,ST 45-8,ST 42,ST 42-2, Q 235,Q345, 20,16Mn, ... specifications and the annual output amounts to RMB1.2 billion. It has imported Lincoin auto-welding ...