... .Suitable for conveyance of gas, petroleum, liquid, and electricity; 2. OD: 21.3-457.2mm api 5l line pipe x421.Commodity NameERW ... carbon steel pipe / line pipe2.Standard,ASTMA252, ASTM A53, API ... ,X46,X52,X60,X70,X80 etc11.UsageFor line pipe in petroleum and natural gas , water and gas, mineral slurry. Also for chemical industry ...