We can manufacture spiral steel pipe with good quality as per API5L,GB,JIS,DIN ASTM, ... caps as percustomer's requirements;with FBE internal coating for water steel pipes.10.MaterialA53(A,B),Q235B,Q345B,16Mn, 20 ... ,X65,X70, etc11.Usagefor petroleum/ natural gas pipeline , for conveying water,drainage,coal gas, mineral slurry and other low-middle pressure ...