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  1. engineer2385

    Filler metal selection

    Hello, I am attempting to learn welding engineering by myself. When it comes to selecting filler metals, I am aware of the considerations such as base metal matching strength, welding process and welding position do matter. I recently came across a wps where ER-347 was used in the TIG welding...
  2. engineer2385

    N-2 Code data report form

    Hi, Can someone tell me which part of ASME Sec III talks about requirements of N-2 code data report form for valves and spare parts?
  3. engineer2385

    Bellows Seal Gate or Globe

    Hello Everyone, I am new to the Valve industry and learning different designs and standards. Just came across Bellows Seal Gate and Globe. I read SP-117 and a few drawings and see that Bellows undergo Compression and Extension cycle under pressure. Recently, I observed leakage through Bellows...
  4. engineer2385

    Helium seat leak test for Swing Check valves

    Hello, If Helium seat leak test is required by a customer for a swing check valve, what should govern test duration and the leakage criteria? Gas Pressure for seat test is 80 Psi minimum as per SP-61. MSS-SP-61 gives leakage rates for seat leak tests with Air and Gas. Does that mean it includes...
  5. engineer2385

    NACE Vs ASTM Hardness values

    Hello Everyone, If a material(e.g.F22 after heat treatment)hardness falls within NACE requirements but outside ASTM requirements, what should govern accept/reject criteria? Thanks

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