OD:219mm-1820mm
THK:5.0mm-20.0mm
Length:12m
Standard:GB/T 9711.1-1997,SY/T 5037-2000,CJ/T 3022-93,SY/T 5040-2000,ASTM A53/A53M-05,ASTM A252-98(R2002),API SPEC 5L
material:10#,20#,16MN,Q295