... marketplace specializes in production of casing and tubing, line pipe and various other mechanical and structural steel pipes for different ... applications. pipe namesteel gradeCasing Pipe/Oil pipe SeamlessAs per API-5CT standard/ISO11960H40\J55\K55\ ... L360,L390,L415PSL 1:A,B,X42,X46,X52 B Structure seamless pipe20#,35#,45#,Q345,Q345B,Q345C,Q345D,20Mn2, ...