... ,X60,X70,etc 4.Certificate:ISO,SGS Product Spiral steel pipe StandardBS 1387, ASTM A106-2006, API 5L, JIS ... will supplied with shipment, The third inspection(ISO,SGS,BV) is acceptable.Inspection content: External Dimension,Chemical Composition,Mechanical ... Properties,Nondestructive inspection, Hydrostatic test and as requirementsOur products enjoy ...