... /a53 gr.b;api 5ct. 2,ISO9001-2008/ISO11960 3,third party inspection supported. 4,API 5CT-1043, API 5L-0699 Linzhou ... other tests as per API specs.None destructive test (NDT)Third Party Inspection can also be performed on request.Protection:External bare, or ... does not mean that we don't supply them. You can still send us an enquiry list. More details about us ...