API RP 621-2018 pdf free download

API RP 621-2018 pdf free download.Reconditioning of Metallic Gate, Globe, and Check Valves
3 Terms and Definitions For the purposes of this document, the following definitions apply. 3.1 carbon assay The carbon content of the base material used in compression packing (i.e. yarn or tape) after volatile materials are driven off. This measurement is made on the material before the inclusion of additives or coatings to enhance packing sealing performance. 3.2 new A valve that has been manufactured under a quality assurance program to a specific design and tolerances by an OEM, was never installed or utilized, and does not meet the definition of a surplus valve. 3.3 obturator (closure member) Part of a valve, such as ball, clapper, disc gate or plug, that is positioned in the flow stream to permit or prevent flow. 3.4 reconditioned A valve that is no longer new, has been restored to the requirements of this RP, and is the property of the Owner. 3.5 safety data sheet SDS Formerly known as material safety data sheet (MSDS), which is used to communicate the hazards of chemical products.
3.6 surplus valves Valves that were purchased new for a specific project or application but were never installed or utilized. Also, the valve may not have been stored in conditions recommended by the OEM and thereby require reconditioning to return to useful operation. 3.7 traveler document A paper or an electronic document that identifies the current condition, necessary repairs, and completed repairs for any or all component parts of a valve. 4 Owner Access and Responsibilities 4.1 Owner shall have access to all reconditioning work, documentation, inspections, and test results at all times. 4.2 Access by the Owner shall be conducted in a manner that is not disruptive to the reconditioning work. 4.3 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 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 evaluate the technical qualifications and quality management system of the selected facility. 4.4 Valve Information 4.4.1 Owner shall communicate to the Reconditioner information on any known problem with the valve. Any tag placed on the valve by the Owner should be of a type and material that resists damage, fading, and inadvertent removal. 4.4.2 A safety data sheet shall be provided for each service media and/or materials used to clean the valve that may have been contained in the valves sent for reconditioning.
4.5 Preparation for Shipment to Reconditioner Valves to be shipped to the Reconditioner shall: 1 ) be in the open or partial open position; 2) have all residual product drained and/or flushed out of the body; 3) be decontaminated sufficiently so that it can be disassembled and handled without special precautions; 4) have end flange gaskets removed. 5 Inspection, Identification, and Disassembly of Valves 5.1 General 5.1.1 5.1.2 As soon as practical, valves shall be marked to identify the Owner (see 5.2.1 ). Valves shall be visually inspected and classified as valves capable of being reconditioned, or scrap. 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.