New gas pipeline pressure alarm setting
New gas pipeline pressure alarm setting
(OP)
Hi everybody:
34", 408 km, natural gas pipeline, with min. MAOP design and min MAOP hydrotest as data, I would like to know which is the best way to setting my scada alarms for high, high high, low and low low pressure?.
Thanks in advance.
34", 408 km, natural gas pipeline, with min. MAOP design and min MAOP hydrotest as data, I would like to know which is the best way to setting my scada alarms for high, high high, low and low low pressure?.
Thanks in advance.





RE: New gas pipeline pressure alarm setting
I bet that rather than asking how to set the alarms, you were really asking how do you determine appropriate set points for those alarms. For that one you are probably on your own. Each system is different and the way the equipment interacts is different. Alarms or kills need to be set at values that minimise total risk. A low low pipeline pressure alarm would probably be interpreted as a major rupture, but it could also be a loss of supply. Low alarms are usually set to protect some piece of equipment like a compressor that has temperature problems when the compression ratios get too high. etc. Knowing the MAOP is not a lot of help in determining operational setpoints since normal operation should try to stay away from any PSV setting.
David
RE: New gas pipeline pressure alarm setting
Minimums are best set by an operational simulation of each mode of operation you might have, first at near minimum pressures when in steady state and then for the lowest pressures seen when transitioning between one mode of operation to another.
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RE: New gas pipeline pressure alarm setting
Thanks for their answers.
Regards
Julio