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- W2063868980 abstract "Recognizing the need for adequate repairs of ASME/National Board stamped safety and safety relief valves, the National Board Executive Committee approved procedures in January 1977 for the issuance of a National Board Certificate of Authorization for the use of a valve repair ''VR'' stamp. The intent of these procedures was to establish realistic standards by which proper repairs could be made on safety and safety relief valves to restore their performance and condition equivalent to the standards for new valves. Paragraph 7.1 of the booklet, ''National Board Authorization to Repair ASME and National Board Stamped Safety Valves and Safety Relief Valves,'' NB-65, defines a repair of a safety and safety relief valve as the ''replacement, remachining or cleaning of any critical part, lapping of seat and disk or any other operation which may affect the flow passage, capacity, function or pressure retaining integrity.'' Even disassembly, reassembly, and/or adjustments that affect a valve's function should also be considered a repair. This does not include, however, testing or adjustments of new valves upon initial installation." @default.
- W2063868980 created "2016-06-24" @default.
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- W2063868980 date "1984-03-05" @default.
- W2063868980 modified "2023-09-24" @default.
- W2063868980 title "Care needed in repairing safety valves" @default.
- W2063868980 hasPublicationYear "1984" @default.
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