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  1. alizali

    breather valve / vacuum valve of storage tank inspection period

    hello guys i am looking for inspection period of testing breather valve / vacuum valve of storage tanks. does API 653 clear it or not? is there any other standard talk about it ?
  2. alizali

    TEMA standard: tubesheet holes groove

    Dear all TEMA expert In TEMA standard, section 5 part RB-7.24, is talking about tubesheet holes grooving for roller expand and hydraulic expand. In this part number of grooves and its width and depth is considered. But I am looking for distance between grooves (when 2 grooves are used) and the...
  3. alizali

    Boiler hydrotest

    thank you very much very helpfull
  4. alizali

    Boiler hydrotest

    could you give me this NBIC. i can not find it anywhere at least a scan of this page that told testing with working pressure is allowed thank you
  5. alizali

    Boiler hydrotest

    dear metengr we belive in the same way and so we never hydrotest boiler before. but the insurance company and our SGS inspection (for ISO 9001 licence) force us to do it. we are looking for a code or standard that tell us 1. we do not need to hydro test the boiler 2. if we have to, what is the...
  6. alizali

    Boiler hydrotest

    the boiler is 15 ton steam producer per hour. the steam drum, mud drum and fire box is reachable. the tubes in firebox is tested as fallow 1. thickness measurement that tube are between 2.5 and 3 mm with no corrosion history 2. hardness test that all tubes are under 200HB. the first hydro-test...
  7. alizali

    Boiler hydrotest

    dear for a water tube boiler that works over 10 years, without any welding after hydro test with 1.5 times MAWP do we need to test with this pressure every year in inspection? if yes does it safe? if no what is the code or standard for this situation? in another topic i found this case referes...
  8. alizali

    calculation of torque force needed for fastening blots

    thanks any other suggestion?
  9. alizali

    calculation of torque force needed for fastening blots

    I am looking for standard of calculating the torque force need to fasten nut and bolt (standard nuts A194 all grade and standard bolt A193 all grade, all sizes) of piping flanges or some equipment such as towers or rectors in both condition cold and hot bolting that have metallic gasket (such...

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