Pipeline ESD
Pipeline ESD
(OP)
Hi There
I'm in a SCADA commissiong for a gas pipeline (408 km), Emergency Shut Down from Control Room is being set up:
1.- One for metering station, ESD closes all MS valves.
2.- One for Pressure control station, ESD closes all PCS valves.
3.- One for Plant Facility Receiver, ESD closes all PFR valves.
4.- Finally a General ESD that closes all valves.
I would like to know about "standar" or "criteria" to put this ESD in SCADA system.
Thanks in advance
I'm in a SCADA commissiong for a gas pipeline (408 km), Emergency Shut Down from Control Room is being set up:
1.- One for metering station, ESD closes all MS valves.
2.- One for Pressure control station, ESD closes all PCS valves.
3.- One for Plant Facility Receiver, ESD closes all PFR valves.
4.- Finally a General ESD that closes all valves.
I would like to know about "standar" or "criteria" to put this ESD in SCADA system.
Thanks in advance





RE: Pipeline ESD
If all the valves that should ESD are built to spring to their ESD position (usually shut, occasionally open), then the "control" scheme is to shut off control air and vent it (or open a switch). Everything else "fails" in its defined position.
David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
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"It is always a poor idea to ask your Bridge Club for medical advice or a collection of geek engineers for legal advice"
RE: Pipeline ESD
Other than that, I don't understand the OP question. What do you mean by, "put that in the SCADA system", writing the control program?
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"The problem isn't finding the solution, its trying to get to the real question." BigInch
http://virtualpipeline.spaces.live.com/
RE: Pipeline ESD
RE: Pipeline ESD
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"The problem isn't finding the solution, its trying to get to the real question." BigInch
http://virtualpipeline.spaces.live.com/
RE: Pipeline ESD
BigInch, "put in the Scada system", I'm talking about shutdown initiator from control room, they will be programmed like push buttons in the control system, are there some rules to put this ESD in different places?
Bye There
RE: Pipeline ESD
The overall screen will have the general shutdown prominently displayed and possibly all local shutdowns too, each local shutdown contained within a smaller box devoted to the particular subsystem, but not always. Sometimes you have to drill down to the subsystem to remotely activate that subsystem's ESD. Just depends on how you want to write your SCADA spec. I think its a good idea to have access to all shutdowns from the overall screeen, but sometimes a whole system is too complicated to display each and every shutdown on the overall display. In that case, you may have access to the primary facility shutdown and ESD valves on the overall, and have to drill down to get access to subsystems within that facility, such as an ESD for the one pump area only and a separate ESD for another pump area, an ESD for lines going to the tank farm, etc.
Typically the SCADA vendors have a customary way of making their particular displays, if the owner does not have a particular way they want it done, most somewhat similar, but they can vary from vendor to vendor. Then again, some companies have standards to show open valves green and closed valves red, opening valves blue and closing valves yellow, some companies like the reverse, some companies use a flashing color to indicate a changing valve position. Some companies like to see their running pumps red and their stopped pumps green, I like the reverse.
I do not like to see a remote control to open an ESD valve via SCADA, unless you get a local OK too.
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"The problem isn't finding the solution, its trying to get to the real question." BigInch
http://virtualpipeline.spaces.live.com/
RE: Pipeline ESD
I'll shut up now and let you go back to the point of the thread.
David
RE: Pipeline ESD
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"The problem isn't finding the solution, its trying to get to the real question." BigInch
http://virtualpipeline.spaces.live.com/
RE: Pipeline ESD
Overview
Drill-down 1 level to,
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"The problem isn't finding the solution, its trying to get to the real question." BigInch
http://virtualpipeline.spaces.live.com/
RE: Pipeline ESD
Best Regards
Qalander(Chem)
RE: Pipeline ESD
Didn't know what else to say.
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BTW, the solar panels are in an area where even buckets with holes in the bottom go missing.
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"The problem isn't finding the solution, its trying to get to the real question." BigInch
http://virtualpipeline.spaces.live.com/
RE: Pipeline ESD
RE: Pipeline ESD
**********************
"The problem isn't finding the solution, its trying to get to the real question." BigInch
http://virtualpipeline.spaces.live.com/