... 5L-0699 Seamless steel pipe factory Linzhou Fengbao Pipe Co.,Ltd. as a seamless pipe manufacturer in the worldwide ... L290,L320,L360,L390,L415PSL 1:A,B,X42,X46,X52 B Structure seamless pipe20#,35#,45#,Q345,Q345B ... Before sold in the market, each of the products must be tested strictly. Weight calculation formula(OD-WT ... service provider!If you don't find the products you need there, it does not mean that ...