API RP 6DR:2006 pdf download

API RP 6DR:2006 pdf download.Repair and Remanufacture of Pipeline Valves.
• Removal of the defect using a suitable means.
• Inspection of the excavated area using the same methods and criteria used to find the defect.
• Weld fill the subject area using qualified procedures and welders per 8.4.
• Grind or machine the welded surface to a finish and dimension(s) consistent with its purpose. As a minimum, surfaces shall be consistent with cleaned castings or foiings.
• Inspect the completed surface using the same methods and criteria used to find the defect.
8.6 NON-DESTRUCTIVE EXAMINATION (NDE)
NDE. where applicable, shall be performed and evaluated by SNT-TC-lA or ISO 9712 Level II certified technicians. Procedures for the NDF. evaluations shall he per ASME Section V. as a minimum.
9 Reassembly
Valves shall be reassembled in accordance with documented procedures which are not less stringent than the OEM or owner’s requirements and API Spec 6D. Special processes and procedures shall be provided in written instructions. New packing, gaskets. and non-metallic parts shall be used. See A.6 for replacement bolting requirements.
Interfaces between pressure controlling parts shall be assembled free of any sealant, except where the sealant is the primary means of sealing. A lubricant with a viscosity not exceeding that of SAE I OW motor oil or equivalent may be used if necessary for assembly of pressure controlling parts.
Other parts such as threads, bearings, sliding parts, etc. may be lubricated, if necessary for assembly, using an appropriate oil or grease.
Note: Valves specified by the owner as “critical service” valves for ethylene or other services shall not be lubricated during assembly. If minimal lubricant is required, the rcconditioncr shall supply details to the owner for evaluation.
10 FinalAcceptance
10.1 PRESSURE TESTING
Repairedremanufactured valves shall be pressure tested in accordance with the requirements of API Spec 6D. as a minimum. Supplemental tests may be performed as agreed between the owner and the reconditioner.
10.2 CUSTOMER NOTIFICATION
Should the repaired or remanufacrured valve not meet API or OEM requirements, the owner shall be notified by the reconditiormer of such status.
11 Equipment Marking
11.1 NAMEPLATES
Nameplates shall be made from austenitic stainless steel or other material with equivalent or better corrosion resistance.
11.2 MARKING
Sec Section 6 for additional marking information.
12 Preparation for Shipment and Short Term Storage
12.1 All pressure shall be relieved and all test fluids shall he purged from the valve.
12.2 Moving parts7 shall be lubricated with a lubricant suitable to the design and titnction of the part. as applicable, only after successful completion of all pressure and functional testing.
Note: ‘ilves specified by the owner as “critical service” valves for ethylene or other services shall not be lubricated during assembly. If minimal lubricant is required. the rcconditioncr shall supply details to the owner for evaluation,
12.3 All non-iorrosion resistant valves shall be externally primedpainted in accordance with the reconditioner’s procedures or owner’s procedures. Stainless steel valves shall not be painted unless specified otherwise by the owner, The seal surfaces of flange faces, weld bevel ends and exposed stems shall not be painted.
12.4 Bare metal surfaces shall be protected with a rust preventative that provides protection at temperatures up to at least 50°C
(1221:).
12.5 Valves shall be prepared for shipment to prevent damage to internal and external components and allow for safe transport to the owner’s designated location. Valve flanges and weld ends shall be blanked off to protect the gasket surfaces, weld preparations and valve internals during shipment and storage. Protective covers shall be made of suitable materials such as wood, wood fiber, plastic, or metal. They shall be securely attached to the valve by such means as bolting, steel straps. steel clips, or suitable friction locking devices. The design of the covers shall prevent the valve from being installed unless the covers are removed.
12.6 Plug, ball, and gate valves shall be shipped in the fully open position, unless fitted with a “fail close” actuator. Check valves shall he shipped with the disc supported or secured during transit. Valves provided without an operating mechanism shall have significant annular spaces closed. Exposed stems shall be protected from damage.
13 Documentation
13.1 GENERAL DOCUMENTATION
Documentation shall be legible, retrievable, and reproducible. The following general documentation shall be maintained by the reconditioner:
• Weld Procedure Specifications (WPS).