... ,EN10219 1.Commodity NameERW carbon steel pipe / line pipe2.Standard,ASTMA252, ASTM A53, API 5L1,5L2, API 5CT, GBT/ 9711.1 GBT ... , 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 ...