... .10.MaterialA53(A,B),A106(A,B),Q345,16Mn, 10# 20#,45# S235JR, S355JR;ASTMA252 Gr.2,Gr.3; ST37,ST42 ... ,X56,X60,X65,X70, etc11.Usagefor petroleum/ natural gas pipeline , for conveying water,drainage,coal gas, mineral slurry and other low-middle pressure ...