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  1. XYZ998

    Why no mention of 316 SS fitted pumps in API 11N?

    Hello, I have noticed that many vendors quote charge pumps with 316 SS internals for LACT units, whereas API 11N recommends that bronze fitted pumps should be furnished for sweet crude service, and cast iron pumps should be furnished for sour crude service. I am curious why there is no mention...
  2. XYZ998

    High Yield Pipe in B31.3 Facilities

    Thanks for the insight. That helps me tremendously. I will probably stick with A106 Gr. B for the practicality reasons explained by LittleInch above. The recent compressor stations were built to 31.8. We occasionally get involved with small gas plant projects though, so I have been reviewing...
  3. XYZ998

    High Yield Pipe in B31.3 Facilities

    When I do the math (per B31.3)on a 6" pipe with 1/16" corrosion allowance and 1440 psig internal design pressure, A106 Gr. B is going to require that I use XH wall thickness, whereas if I use API 5L Gr. X52 I can get by with STD wall thickness. So if my math is correct, it appears that B31.3...
  4. XYZ998

    High Yield Pipe in B31.3 Facilities

    Thanks for the response. I just had a look at Table A-1 in the 2008 Edition. The basic allowable stresses of A106 Gr. B and API 5L Gr. X42 are both listed as 20 ksi at 100-400ºF, which seems consistent with your response, however API 5L X52 is listed as 22 ksi at 100-400ºF.
  5. XYZ998

    High Yield Pipe in B31.3 Facilities

    Hello, I have noticed that many companies do not utilize high yield pipe (e.g. API 5L Grade X42) in their pipe specs for facilities that will conform to B31.3. However, the same companies do utilize high yield pipe in their specs for facilities conforming to B31.8. Is there a reason that high...

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