公司名称：河北中海钢管股份有限公司

asme sa210 a252 Gr.1/Gr.2/Gr.3 A50

corrugated /Grooved Pipe
LSAW. UOE/JCOE
bs 729 hot dipped galvanized coatings steel pipes and tubes
Q235, Q345, Q195 welded pipe,Longitudinal Electronic Resistance Welding(ERW)
High Frequency Welding(HFW)
ASTM A333/GR3;GR6;SA335-P11;P5;P9;P91;P22;P23;P36;P92;
ASTM A500/A513/SA519-
ASTM A671/SA672/A691-B60;B70;C65;D70;