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Recent content by pipexp

  1. pipexp

    Basis for vaccum pressure design

    Thanks MJ Cronin. Can you please give a brief on how vacuum is created during steam out of a vessel. Regards
  2. pipexp

    Basis for vaccum pressure design

    Dear Experts, Can you suggest what should be the basis for design of a pressure vessel for vacuum pressure. Regards, Pranjal
  3. pipexp

    Tungsten Carbide coating

    Dear Experts, Thanks for your valuable input on the subject which helps in firming up the requirements. Based on the above, I consider 150 to 250 micron is a good choice considering availiability in the market, production time of the valve. As I understand 400 micron may be a bit over specified...
  4. pipexp

    Tungsten Carbide coating

    Dear Experts, What should be coating thickness of Tungsten Carbide on metal seated ball Valve? In one of TOTAL specification I have noticed the coating thickness to be 400 microns. But many of the vendors in the field informs that 400micron is not a good option. Most optimum value shloud be in...
  5. pipexp

    HARDNESS OF INCOLOY 825 & INCONEL 625

    Dear Experts, I am confused about hardness requirement of Corrosion Resistant Alloys. NACE MR 01-75/ISO-15156-1/2/3 does not categorically suggests the hardness value of Incoloy-825 and Incoloy 625 material. Can experts in the field through light on the subject. Regards,
  6. pipexp

    Hardness of UNS N 08825

    Can any body suggest the of of UNS N 08825 and UNS N 06625 as per NACE MR0175/ISO1516-1/2/3. I need the referance clause of MR-0175. Regards,
  7. pipexp

    Leakage raey acceptable

    Hi experts, I would like to add further to above that in the case, I suggested, all safety systems i.e. Primary and secondary protection of complete piping as required by API RP 14C are in place. Regards, Pranjal
  8. pipexp

    Leakage raey acceptable

    Hi Experts, Thanks for guideline suggetsed by various experts. But I would like to suggest API RP 14C, is a Recommended Practice for Analysis, Design, Installation and testing of Basic surface safety systems for offshore Platforms. Therefore, this may be applicable for all the types of Valve...
  9. pipexp

    Leakage raey acceptable

    Hi Experts, While going through API RP 14C, I have noticed that there a valve leakge upto 400cc/min is categorized as criteria for deciding whether a valve is required to go for maintanance. Thereby can we assume this much leakage in operation is acceptable. Regards
  10. pipexp

    Leakage raey acceptable

    Hi Experts, Can any body suggest whether in a offshore platform all the valves including Shut Down Valve can be made metal seated. In such case what should be the criteria in case of spec. Break. Because with metal seated valve, zero leakage is not possible and hence, if there is a spec. break...
  11. pipexp

    selection of pressure vessel heads

    Dear Experts, Can some body advice on the basis of selection of pressure vessel head. Regards,
  12. pipexp

    Hot dip galvanizing of carbon steel

    Dear Experts, I am little confused to understand that ZINK being anodic with respect to carbon steel how it will save carbon steel from corrosion in case of hot dip galvanizing. Rather, the zink layer will get corroded. Please clarify my understanding on the issue, Regards
  13. pipexp

    Support design in piping system

    Dear Experts, Is any difference in piping support design for a piping system having slug flow. Can any body suggest study material for the same. Thanks and regards
  14. pipexp

    CLADDED AND LINED CRA PIPE

    Dear Steve, Do you know of any history of failure in lined pipe i.e.liner collapse. Thanks
  15. pipexp

    CLADDED AND LINED CRA PIPE

    Thanks Steve, Further to the query do you have any idea why most of operating industry in oil gas sector prefers only metallurgic ally bonded pipe and not mechanically bonded pipe. Regards,
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