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Recent content by p6g2p6

  1. p6g2p6

    Low cost butterfly valves without the rubber lining

    Hi, I am looking for a 24" butterfly valve for a low to medium pressure service. Every valve I have been quoted has been the resilient seated style with the rubber lining extending out onto the flange face. I'd prefer a valve with no rubber on the flange faces, however it seems that the only...
  2. p6g2p6

    Literature for vertical shaft journal bearings

    Thanks, I will give this a try!
  3. p6g2p6

    Literature for vertical shaft journal bearings

    Hi, does anyone know of any reports, studies, textbooks, etc. that I could reference for the design, maintenance, and operation of journal bearings for vertical shaft machines? All of my textbooks focus more on horizontal axis machines, such as steam turbines, however I am looking for more...
  4. p6g2p6

    Joint Efficiency for bolted blind flanges (ASME BPVC.VIII UG-34)

    Makes sense, thank you!
  5. p6g2p6

    Joint Efficiency for bolted blind flanges (ASME BPVC.VIII UG-34)

    I am designing a bolted blind flange on a very low pressure system (less than 20 psi) and I am using BPVC.VIII to determine the minimum thickness of the flange. I am using equation 1 because it will be a flat face flange with full face gasket, so there will be no edge moment. The formula is very...
  6. p6g2p6

    ASME B31G - Level 1 Evaluation of Remaining Pipeline Strength

    1503-44, here you go:
  7. p6g2p6

    ASME B31G - Level 1 Evaluation of Remaining Pipeline Strength

    1503-44, my version of the code (2012)shows how to calculate the failure stress, which uses similar equation to yours above. It says to convert it to the failure pressure, Pf, the formula is Pf = 2*Sf*t/D, which uses the nominal thickness. Does this seem right?
  8. p6g2p6

    ASME B31G - Level 1 Evaluation of Remaining Pipeline Strength

    Hi, I am using ASME B31G to estimate the remaining strength in a corroded area of a pipeline. I have all the info I need (corrosion depth, length, etc.). When calculating the hoop stress of the pipe at the operating pressure, should you use the nominal pipe wall thickness, or the remaining...
  9. p6g2p6

    ASME BPVC VIII Appendix 2 - Wm2/Wm1 vs W

    SnTMan, thank you for the clarification. I will refer to PCC-1.
  10. p6g2p6

    ASME BPVC VIII Appendix 2 - Wm2/Wm1 vs W

    Hi, I am still new to using the AMSE BPVC, and I am a little confused by the bolt load calculations. I understand that you need to calculate the bolt loads required for the design conditions (Wm1 and Wm2) and select the greater of the two to use as your minimum required torque, however I don't...
  11. p6g2p6

    Raised face vs flat face lugged valves

    GBTorphenhow, Thank you for the advice! This is what I thought, but wanted to confirm. Just out of curiosity, do you know why lugs aren't designed to be the full width of the valve? Is there a benefit to this?
  12. p6g2p6

    Raised face vs flat face lugged valves

    TugboatEng, I'm just curious because I'm wondering if lugged valves can be installed between flat face cast iron flanges. I'm early on in my career, but I've only seen lugged butterfly valves where surfaces of the lugs does not come in contact with the flanges, which I would assume you...
  13. p6g2p6

    Raised face vs flat face lugged valves

    Hi, Are lugged valves available in raised or flat face? It seems that every lugged butterfly valve that I come across has a flat retainer ring, but then the lugs are offset, such that the lugs would not come in contact with the flange when they are bolted together. This to me seems that it would...
  14. p6g2p6

    Spiral wound gaskets for use with flat face flanges

    Thank you for the responses. The piping, flanges and valves were all replaced at the same time. I'm not sure what gaskets are in there right now and unfortunately the site is not accessible for the next couple months. The reason I was looking into spiral wound gaskets was because it was...
  15. p6g2p6

    Spiral wound gaskets for use with flat face flanges

    Littleinch, this equipment was installed before my time, so I am not sure why a flat face SS flange was used. It is flanged to a SS lugged butterfly valve. I will take a read through of appendix B.
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