Q
what kind of the standard of square steel pipe
A
 square pipe standard include :                                  

ASTMA53,BS1387-1985,GB/T3091-2001,GB/T13793-92, GB/T6728-2002

material include :

Q195,Q215,Q235,Q345

 

Previous:The standard of welded steel pipe

Next:the kind of galvanized steel pipe