JaredNOVA
Chemical
- Jun 9, 2016
- 2
Working on a project for isolation block valves and wanted to be sure I fully understood the requirements before I started.
Under M-5.3 the first few line items are pretty self explanatory its when I get to item (g) that I become confused at what the standard is asking.
My interpretation is the code:
Item G: is requiring you perform a review/"analysis" of all pressure sources for the vessel assuming no relief exists (i.e. because the block valve is closed) and determine the maximum pressure level.....(I don't get involved with relief calculations but would a relief valve design basis have be acceptable for this analysis requirement). Does anyone have an explanation of what exactly those that wrote this were looking for?
Item H: they want someone who knows what there doing to be performing these analysis....but what exactly is their interpretation of "qualified" is experience enough or and industry training, certification or what?
Item I: This is the one that really got me.....So its saying all other components but provides no definition of what all the incorporates is it just the inlet piping for the relief, flanges for the relief piping, or does it mean the vessel and if it means the vessel does it mean all the nozzles, and if it means the nozzle does it mean the inlet/outlet piping for the vessel. Any clarity would be much appreciated.
Item J: Pretty self explantory you need to have your operations team review the analysis but what exactly does this analysis look like
Item K: This is referencing back to item B saying that your operations need to approve your administrative control philosphy but I guess what baffles me a little is basically you are using some form of mechanically locking device (not interlock) and controling its operations through procedures so why do they use such a general term in "administrative control".....were they referring to other administrative controls that may be used to prevent overpressure such as alarms, etc...?
Anyway if there is anyone out there that could provide me with anymore clarity on either one or all of these items and specifically what ASME was desiring that would be much appreciated. I am a huge standard person as I feel it is needed to drive industry but when I come across things like this that in my opinion make it hard for the end user to interpret what exactly they were wanting if no one in your company sat on the committee, sometimes it is disheartening.
Side note I reached out to quite a few professionals who under the impression I got where not doing anything above a relief calculation to meet these requirements under Appendix M.
To summarize I guess I am really just confused on their definition of what the analysis is and what "Other system components" consisted of.
Thanks for any help in advance.
Jared
Under M-5.3 the first few line items are pretty self explanatory its when I get to item (g) that I become confused at what the standard is asking.
My interpretation is the code:
Item G: is requiring you perform a review/"analysis" of all pressure sources for the vessel assuming no relief exists (i.e. because the block valve is closed) and determine the maximum pressure level.....(I don't get involved with relief calculations but would a relief valve design basis have be acceptable for this analysis requirement). Does anyone have an explanation of what exactly those that wrote this were looking for?
Item H: they want someone who knows what there doing to be performing these analysis....but what exactly is their interpretation of "qualified" is experience enough or and industry training, certification or what?
Item I: This is the one that really got me.....So its saying all other components but provides no definition of what all the incorporates is it just the inlet piping for the relief, flanges for the relief piping, or does it mean the vessel and if it means the vessel does it mean all the nozzles, and if it means the nozzle does it mean the inlet/outlet piping for the vessel. Any clarity would be much appreciated.
Item J: Pretty self explantory you need to have your operations team review the analysis but what exactly does this analysis look like
Item K: This is referencing back to item B saying that your operations need to approve your administrative control philosphy but I guess what baffles me a little is basically you are using some form of mechanically locking device (not interlock) and controling its operations through procedures so why do they use such a general term in "administrative control".....were they referring to other administrative controls that may be used to prevent overpressure such as alarms, etc...?
Anyway if there is anyone out there that could provide me with anymore clarity on either one or all of these items and specifically what ASME was desiring that would be much appreciated. I am a huge standard person as I feel it is needed to drive industry but when I come across things like this that in my opinion make it hard for the end user to interpret what exactly they were wanting if no one in your company sat on the committee, sometimes it is disheartening.
Side note I reached out to quite a few professionals who under the impression I got where not doing anything above a relief calculation to meet these requirements under Appendix M.
To summarize I guess I am really just confused on their definition of what the analysis is and what "Other system components" consisted of.
Thanks for any help in advance.
Jared
