... # and so onStandardASTM A252 ,API 5L ,GB/T 9711,DIN10208UsageUsed for gas ,oil,water ,constructionEndsBeveled ,flange ,PlainSurfaceprintTechnicalSAW,ERW,SSAWPaymentT/T or ... PortQINGDAOPackageBundle ,Bulk ,or According to the customers' requirementsInspectionWith hydraulic testing,eddy current,infrared test Sprial steel