... -12m,according to customers’ requirementsSteel materialQ195,Q215,Q235,Q345,ASTM A53StandardBS,GB,ASTM,JIS,DINZinc240— 450g/m2UsageUsed for gas, oil,Ends1) plain2 ... :enterprise culture:enterprise honor:market distribution:Company structure :products application: astm a106/a53 gr.b sch40/sch80 seamless steel pipe