... (seamless)Steel GradeQ195-Q345, st37-2, SS400, ASTM.A53, 20#, ect.StandardGB3091-2001, GB/T 9711.2, ASTM A53, ASTM A106, ... welded pipe NAME OF PRODUCTSquare tube,Rectangular tube,Gi Square pipeSHS(Square Hollow Section),RHS (Rectangular Hollow Section)pre-galvaznized ... 20-45 days after deposit Other productsWelded steel pipe,square/rectangular hollow section,seamless steel pipe, steel strip, ...