... ,ISO9001-2008/ISO11960 3,third party inspection supported. 4,API 5CT-1043, API 5L-0699 Linzhou Fengbao Pipe Co.,Ltd. as a seamless ... other tests as per API specs.None destructive test (NDT) Third Party Inspection can also be performed on request.Protection:External ... -Layer Polypropylene coated seamless steel pipe manufacturer Linzhou Fengbao Pipe Co.,Ltd.