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  1. arash807

    Angle pattern globe valve

    I am asking about the reason why angle globe valves are suitable for two phase flow?
  2. arash807

    Angle pattern globe valve

    Dear members As far as I know angle type globe valves are suitable for two phase flow. from what point of view this type can tolerate such flows?
  3. arash807

    shell and tube heat exchanger hydrotest procedure

    Dear Fegenbush First of all thanks for your reply. Is there any standard procedure for shell and tube heat exchanger hydro test?
  4. arash807

    shell and tube heat exchanger hydrotest procedure

    As far as I know after maintenance or tube cleaning in shell and tube heat exchanger shell test is needed .how about tube test? If tube test also needed which one should be done first? Shell test or tube test?
  5. arash807

    Control Valve - Body/Bonnet with Clamp Connection

    There are different types of bonnet such as bolted bonnet,threaded,welded,extended and pressure seal type.pressure seal bonnet is used for design pressure more than 100 bar.as you can see in attached picture by increasing the internal pressure bonnet sealing improved,unlike bolted bonnet .
  6. arash807

    control valve sizing

    Flow rate=125000kg/h
  7. arash807

    control valve sizing

    I am going to size a control valve for following condition: flow condition:steam P1=41bara P2=33bara temperature=410c specific gravity=11.7 Z=0.98 what would be the amount of Cv?
  8. arash807

    Max Cv

    What is the max Cv for 8" globe valve?
  9. arash807

    specific gravity of steam

    What is the specific gravity of steam at following condition? temperature=410c pressure=41bara
  10. arash807

    Swing check valve disc hole

    In some types of swing check valve,there is a hole on the disc. since it cause to leakage in close position so why is that?
  11. arash807

    Manual valve Cv

    How can we find Cv for a manual valve? For example,what is the Cv for 6" full port globe valve?
  12. arash807

    safety valve

    Pressure existing at the outlet of a pressure relief valve is defined as back pressure. there are two types of back pressure: Superimposed:which is pressure at the outlet of a pressure relief valve when it is required to operate. Built-up:back pressure which develops in the discharge system...
  13. arash807

    Low pressure closure test

    What is the main purpose of low pressure closure test in API598.according to mentioned standard there are also high pressure closure test which is done by higher pressure. so when we use it? and what is the advantage of that?
  14. arash807

    cathodic protection for galvanized piping

    Can we use cathodic protection in order to eliminate corrosion in underground galvanized piping?
  15. arash807

    Galvanized pipe in underground piping

    Can we use cathodic protection in order to eliminate corrosion in underground galvanized piping?
  16. arash807

    Galvanized pipe in underground piping

    Your questions are about piping design.but I am not talking about that.imagine the pipe is correctly selected according to your questions.is it acceptable for underground galvanized pipe to be seal welded? Does not it cause to galvanic corrosion?
  17. arash807

    Galvanized pipe in underground piping

    @bimr first of all thanks for your reply. I have seen underground galvanized pipe which has been seal welded.is it ok?
  18. arash807

    Galvanized pipe in underground piping

    Can we use galvanized pipe with wrapping in underground piping?
  19. arash807

    API trim selection

    I have seen some trim material such as 17-4PH,F6NM and... which are not exist in API600 table8. Is there another standard or reference in order to select control valve trim material?
  20. arash807

    Hastelloy B2 or C276

    Which material has more corrosion resistance,hastelloy B2 or C276?

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