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  • Users: edanyel
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  1. edanyel

    Guy Wires tension

    I don't know if this is the correct forum. My question is: Does anybody know if there is some international Standard stablishing the correct tension for a guy wire? I'm talking of a flare stack supported by for guy wires for stability. I'm looking for something like "...10% of the nominal...
  2. edanyel

    how to put a PSV in service

    I don't know, maybe it's a silly question but... Please, look at the picture, if I have to put the PSVb in service, which will be the correct sequence? Open BVb1 first, then BVb2 ? Open BVb2 first, then BVb1 ? It doesn't matter which one first ? For any answer please, could you give me your...
  3. edanyel

    change over valve

    Hi guys, where I work, I found a manual selector valve under a pair of PSVs, and it's not working properly. The brand seems to be MEREX or something like that. I'm attaching a picture. I can't find information about it. Does any of you have heard about this brand, any web page, some technical...
  4. edanyel

    Translation from English to Spanish

    Hi guys: I found in a form I've got to fill in, the following word (phrase): WETTED ELASTOMER. refering to a material description of a PSV. If among you there is a Spanish language guy, I would like to ask what the translation would be: ELASTÓMERO MOJADO?, HÚMEDO?, BLANDO? Is in this case...
  5. edanyel

    How to know if a PSV has opened?

    I'm sorry if this is an obvious question. Anyway it bothers me, and i'd like to hear opinions. If the vent pipe goes to a flare, if in the test stand the PSV opened at the correct set press and reclosed at the correct blowdown, if there has been no leakage after reclosing, if the line protected...
  6. edanyel

    Rupture disk under Pilot operated SV

    Is it "common sense", "good practice" or "no objection" for the use of a RD under a POSV? I'll be thankfull for your comments. My own feeling is that if a non fragmenting RD is used and the sense tubing of POSV is under the disk there shouldn't be problem at all, please let me know your...
  7. edanyel

    graphite rupture disk

    Hello everybody, please, does anyone of you have any comments or special condsiderations about replacement period of a graphite rupture disk or do you consider them just as any metal one? thanks Daniel
  8. edanyel

    You've all been very coincidents with your answers but...

    I'm sorry for insist in the matter... Now please, think about this... overpressure event, PSV lifts...there is some chattering or some hammering and after a while...pressure drops and PSV closes without leaks... 1)If you don't inspect the PSV, let´s say by a Prepopping test, how do you detect...
  9. edanyel

    need to know if inspection is mandatory by any code if PSV has opened

    Is there any code in which there is a mandatory inspecting action on a PRdevice which has opened in an overpressure event? Changing words: If a PSV has opened and reclosed because of an overprerssure event, shall it be inspected inmediatly? which, if any, standard or code says something about...
  10. edanyel

    Non standard orifice in PSV

    In the plant I work i have a 0.06 sqin orifice PSV. This is outside the standard areas we find in API st526/ rp520. where do I find information about these small area orifices? Any help will be helpfull Thanks in advance
  11. edanyel

    Calibration Tag for PRDevice

    Please Does anybody Knows about what codes talk about the required information in the Maintenance calibration Name plate? The testing facility I work with delivers the repaired / calibrated device with a name plate, shall it show the CDTP or the operating conditions set pressure or both? Is...

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