api 5l line pipe x42 1.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 5L1,5L2, API 5CT, GBT/ 9711.1 GBT/9711.2 ... Q345B,X46,X52,X60,X70,X80 etc11.UsageFor line pipe in petroleum and natural gas , water and gas ...