API RP 621 2010 pdf download.Reconditioning of Metallic Gate, Globe, and Check Valves.
1 Scope 1.1 This recommended practice (RP) provides guidelines for reconditioning heavy wall (API 600 and API 594 type) carbon steel, ferritic alloy (up to 9 % Cr), stainless steel, and nickel alloy gate, globe, and check valves for ASME pressure classes 150, 300, 400, 600, 900, 1500, and 2500. Guidelines contained in this RP apply to flanged and butt weld cast or forged valves. 1.2 It is an expectation of this RP that a contractual agreement shall be established between the Owner and the valve reconditioning facility. The reconditioning facility may be Original Equipment Manufacturer (OEM) owned/ operated, or directly associated and approved by the OEM. At the Owner’s option, an independent facility may be used. The Owner shall determine that the facility selected for valve reconditioning has a documented and established working Quality Assurance Program. The Quality Assurance Program should include the essential elements described in the ISO 9001 standard. 1.3 This RP does not cover reconditioning or remanufacturing of used or surplus valves intended for resale. The only intent of this RP is to provide guidelines for refurbishing an end user’s (Owner) valves for continued service in the Owner’s facility. Valves reconditioned or remanufactured to this RP may not meet API Standard requirements for new valves. The correct application of a valve reconditioned to this RP remains the responsibility of the Owner. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. API Recommended Practice 591, Process Valve Qualification Procedure API Standard 594, Check Valves: Flanged, Lug, Wafer, and Butt-welding API Standard 598, Valve Inspection and Testing API Standard 600 Steel Gate Valves—Flanged and Butt-welding Ends, Bolted Bonnets
3 Owner Access 3.1 Owner shall have access to all reconditioning work, documentation, inspections, and test results at all times. 3.2 Access by the Owner shall be conducted in a manner that is not disruptive to the reconditioning work. 4 Owner Responsibilities 4.1 Valve Information 4.1.1 Owner shall provide the reconditioner with the information necessary to determine the nature of any product that may have been contained in the valve cavity, packing, and/or gasket, and any known problems with the valve. 4.1.2 Any tag used shall be of a type and material that resists damage, fading, and inadvertent removal. 4.2 Material Safety Data Sheet A Material Safety Data Sheet (MSDS) shall be provided for each product that may have been contained in the valves sent for reconditioning. 4.3 Preparation For Shipment To Reconditioner Valves to be shipped to the reconditioner shall: 1) Be in the open or partial open position;
4.4 Valve Rerating If a valve is required to be de-rated as a result of the repair process, the new rating shall be either approved by the Owner, or the valve shall be scrapped. If approved, the old rating shall be removed and replaced with the new rating. 5 Inspection, Identification, and Disassembly of Valves 5.1 General 5.1.1 Immediately upon receipt, valves shall be marked to identify the Owner. 5.1.2 Valves shall be visually inspected and classified as 1) valves capable of being reconditioned, or 2) valves to be scrapped. 5.1.3 For valves that cannot be economically repaired, consideration shall be given to salvaging as many usable parts as possible for use only in valves of the same manufacturer, type, and material. 5.1.4 Scrapped valves and scrapped valve parts shall be disposed of in accordance with their Owner’s instructions. 5.2 Identification Number 5.2.1 Each valve shall be assigned a unique identification number that is traceable back to its Owner’s shipping documentation or other pertinent information such as special instructions, records of previous reconditioning, etc. 5.2.2 Salvaged usable parts (excluding hand wheels) shall be identified as to the Owner, and the identification shall include the name of the valve manufacturer, the size, type, pressure class, and trim of the valve. The unique identification number shall start with an “R.” 5.2.3 If a valve or salvaged usable part is to be stored for a period of time before entering the reconditioning process, the valve or salvaged usable part shall be stamped with its identification number as specified above. Alternatively, a tag with the number shall be attached to the valve or salvaged usable part. Tag shall be of a type and material that resists damage, fading, and inadvertent removal. 5.3 Traveler Documents 5.3.1 An Owner-approved traveler document or electronic file shall be developed and maintained for each valve and shall reference the valve identification number.