... / line pipe2.Standard,ASTMA252, ASTM A53, API 5L1,5L2, API 5CT, GBT/ 9711.1 GBT/9711.2 ... .UsageFor line pipe in petroleum and natural gas , water and gas, mineral slurry. Also for chemical industry, ... France, England, Belgium, etc13.CertificatesAPI 5L PSL1,PSL2 , API 5CT, ISO ,CE1.Commodity NameERW carbon steel pipe / ... line pipe2.Standard,ASTMA252, ASTM A53, API 5L1,5L2, API 5CT, GBT/ 9711.1 GBT/9711.2 ...