api 5l line pipe x42 1.Suitable for conveyance of gas, petroleum, liquid, and electricity; 2. OD: 21. ... as per customer’s requirements10.MaterialQ235B,Q345B,X46,X52,X60,X70,X80 etc11.UsageFor line pipe in petroleum and natural gas ... , water and gas, mineral slurry. Also for chemical industry, building structure and pile driving, etc.12. Export ...