I think your question would be answered in a different forum such as 'gas compression engineering'. Although your question relates to pressure relief devices, this safety relief valve forum is more for the oil and gas industry type valves following ASME and API codes and standards.
@georgeverghese 250mbar is below scope of ASME and PED.
If the OP can just advise to what code/standard/regulation etc., the vessel is built to, then we could answer better.
250 mbar is low pressure, even for the Leser types - but it's not been indicated by you which Leser type/model no.
So Leser's local representative does not know - have they or you contacted Leser?
How can this inspector be rejecting the Leser valve types simply on the basis that he has never...
What exactly is the valve experiencing? You say that the pressure spikes, but how is the valve responding?
Do you have a specification sheet for the valve?
Moreso, can you advise on the size, rating and model no/manufacturer?
What is the history of the application? When installed, service data -...
'Back in the day' my company's manufacturing drawings, which included such flanges, simply stated on the drawing 'Break all corners/edges'. In practical terms, this simply meant the tip of the cutting tool simply touching the corners and/or the deburring operation/operative hand running a larger...
They are completely different designs...
What is the applicable code/specification for the protected vessel?
A safety valve application is principally determined by the pressure and relief capacity it should pass in case of overpressure.
Those selections from BES seem to have very low pressures.
@goutam_freelance You are making incorrect statements (again, due to you referring to old editions of ASME) Per ASME I (2023) PG-71.3.1 you are allowed the use of changeover valves between boiler and pressure-relief valves provided certain conditions are met.
Since you also assumed the OP is...
This is not a 'parallel installation' as such. Parallel installation is where you have more than one Pressure-relief Valve relieving at the same time to pass the minimum required capacity caused by an overpressure event. What you have here is a redundancy set up, sometimes referred to as a...
OK So you're discussing inspection rather than the maintenance subject of the original post.
Granted that any Pressure-relief Device or vessel should follow appropriate requirements, whether this is ASME I, VIII, XIII etc. Not all regions (countries) are mandated to use such codes, but many do...
While API-510 is pressure vessel relevant, as indicated by GD2, it also refers to API-576 which is specifically for inspection of Pressure-relief Devices.
Key to your ongoing maintenance schedule, is to build up a dossier of overhaul and report any issues found. This in turn will ultimately...
Pipis118 If it has been reported that the Pressure-relief Valve opened 10% above its CDTP, then that is cause for alarm.
A Pressure-relief Valve will have a tolerance for the set pressure (the pressure the valve starts to open. CDTP - is the test bench pressure - Cold Differential Test Pressure...
OP Changed weight from 150 kg to 60 kg without highlighting the correction in the post. Such holders should have threaded connections on their periphery to allow use of eye bolts etc., as Shvet had earlier alluded to. But if you can't remove the vertical tubes above, you may have an issue with...
Dumb comment...Reverse of how they were installed? Photo's etc., would be helpful.
*** Per ISO-4126, the generic term
'Safety Valve' is used regardless of application or design ***
*** 'Pressure-relief Valve' is the ASME/API used term ***
See attached extract below from current ASME I (2023) Scope, particularly paragraphs PG-2.1(a) and PG-2.2.
Do also understand that a ASME I safety valve has different operational characteristics compared to a more simpler ASME IV valve, for example ASME I requires full opening at 3%...
You are again referring to extracts from an out of date ASME VIII document.
Also you're still confusing the issue. Capacity tests at 'up to 120%' are for the relief conditions specifically mentioned in (old) UG-125 (c)(3). You seem to be picking out sections to suit your narrative. What exactly...
@goutam_freelance No. You are confusing capacity certification, which is required to be done at 10% overpressure, with operational overpressure.
FYI. UG 131 was transferred from ASME VIII to ASME XIII in 2021. In any case (old 2019) ASME VIII UG 134 allowed setting of 105 % of multiple valve...
