API RP 6DR-2012 pdf download.Recommended Practice for the Repair and Remanufacture of Pipeline Valves.
4 Preparation for Shipment to the Reconditioner The owner shall complete the following activities before sending the equipment to the reconditioner: a) All pressure shall be removed from valve cavities and accompanying actuators, tanks, etc. b) Hazardous materials shall be removed and cleaned from the valve and accompanying equipment. c) Copy of the material safety data sheet (MSDS) to be provided for the valve service media. d) Valves should be checked for NORM in accordance with the applicable local regulations (region/state/country/ province). Valves containing NORM may require special handling and cleaning procedures. 5 Control of Equipment The valve shall be identified by the owner name/location or other appropriate identifier. Each valve shall be assigned a unique identification number 5 . This number shall be traceable back to the pertinent instructions and or information provided by the owner. A visual inspection shall be conducted to determine if the valve can be reconditioned. If valve cannot be reconditioned, notify the owner for disposition instructions. Disposition may include one or more of the following: a) Salvage useable parts. b) Scrap in accordance with the owner’s instructions. c) Return to the owner. 6 Disassembly and Cleaning of Valves Valves to be reconditioned shall be completely disassembled. Packing, gaskets, and non-metallic parts shall be removed and disposed of in accordance with the owner’s instructions or appropriate safety procedures.
The Original Equipment Manufacturer (OEM) tag shall not be removed. Damaged tags which cannot be properly attached shall be retained in the reconditioned valve document file. Tags from previous reconditioning shall be removed and the tag(s) or information from the tag(s) placed in the reconditioned valve document file. Tags may be electronically scanned or the information recorded and kept in the reconditioning document files. The new identifier number shall be stamped on body, bonnet, cover, closure member, seats (if removed), stem and any other major components, using low stress stencils. If stamping is not practical, parts may be tagged or electro etched, except that all stems and closure elements for valves 2 in. and larger valves shall be marked by stamping. Finished surfaces that may be damaged shall be protected. Identification numbers marked on parts shall remain on the parts throughout the reconditioning process. Smaller parts may be placed in a container labeled with the unique identification number.
7 Evaluation of Components All components shall be inspected and evaluated in accordance with documented procedures. This shall consist of the following, as a minimum: — Visual and dimensional inspection as to suitability for reuse. — Verification of API 6D specified flange and end-to-end dimensions. — Evaluation as to valve fitness and function. Annex A provides minimum requirements for evaluation of components. 8 Repair/Remanufacture/Replacement of Valve Parts 8.1 Control of Manufacturing Operations Repair and remanufacture operations shall be performed in accordance with documented procedures. 8.2 Inspection of Valve Parts Valve parts shall be inspected to determine their acceptability for re-use and/or extent of required repair. Inspection shall be performed per documented procedures not less stringent than the OEM or owner’s requirements. Equipment for measuring dimensions shall be controlled and calibrated in accordance with the reconditioner’s methods specified in documented procedures which shall be consistent with nationally or internationally recognized standards. 8.3 Replacement Parts and Material Source of replacement parts shall be one or more of the following. a) Suitable replacement parts from the OEM. b) Parts obtained from similar valves from the same valve manufacturer. c) The material must be identified, and critical dimensions verified to be the same as the original component. d) Manufactured or repaired component parts, from the recondition facility. These parts shall be made from materials equivalent to the original. Where the material cannot be determined or it is desirable to substitute a material different from the original, the part design shall be supported by the OEM’s design file or the reconditioner’s design file which is not less stringent than the OPD. Replacement parts shall be made from materials that are procured to written specifications.