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  • Users: arosum
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  1. arosum

    Gate Valve Seats from Solid Stellite

    I see that lot of Valve manufacturers use solid stellite 6 seats for sour service Gate valves and majority of the after market seat manufacturers offer cast stellite 6 seats (AMS 5387) but API 6A prohibits the use of castings and clearly ask for wrought products for PSL3 and PSL4 applications...
  2. arosum

    Gate Valve PR2 requirements

    Question on API 6A Gate valve PR2 qualification requirements; if the requirement is to develop just a PR2 Gate valve without the mention of Annex F, does the valve still need to qualify Annex F temperature cycles? or, does it qualify to be sold as PR2 by meeting 200 ambient seat test cycles as...

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