The valve should include the following documents:
     --Designing Documents;
     - Welding Procedures (WPS);
     - Welding Process Assessment Record (PQR);
     - Welder Qualification Record (WQR);
     - NDE personnel qualification records;
     - calibration record of the test device;
         - Valves greater than or equal to DN 50 (NPS 2):
         - The smelting certificate for the valve body, bonnet/cover and end connection can be traced back to the unique valve serial number;
         - trace the serial number of the valve material list;
         - Pressure test results.
     The manufacturer shall provide clear, traceable, reproducible documentation and avoid damage.
     The manufacturer shall retain the documents required by this standard for at least 5 years from the date of manufacture.
     The Buyer shall specify the special supplementary documentation requirements that shall be provided in Appendix D.