... thickness 3,wide range specification Seamless steel pipe factory in Henan China Linzhou Fengbao Pipe Industry Co.,Ltd. as a seamless pipe ... marketplace specializes in production of casing and tubing, line pipe and various other mechanical and structural steel pipes for different applications ... L360,L390,L415PSL 1:A,B,X42,X46,X52 B Structure seamless pipe20#,35#,45#,Q345,Q345B,Q345C,Q345D,20Mn2, ...