Information About Abbreviations Used in P&IDs for Denoting Different Instruments

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jjigarjoshi Participant Join Date: Jul 2013 Posts: 1	Information About Abbreviations Used in P&IDs for Denoting Different Instruments 07/15/2013 2:12 PM
	Can anyone help me how can I find out abbreviations for different instruments shows in P&Ids??as as example..NZSC stands for limit switch..NPT for pressure transmitter....etc.. plz help me to find out whole abbreviation directory..
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#1 Re: Information About Abbreviations Used in P&IDs for Denoting Different Instruments 07/15/2013 3:10 PM
	Tips for Posting on CR4: Look for answers before you post. Search CR4 or use a search engine to see if you can find the answer to your question. Instrument Abbreviations Used in Instrumentation Diagrams (P&ID Basic Functions of Instruments in a P&ID ~ Learning Instrumentation ISA codes for Process Instrumentation - Engineering Toolbox ~~[PDF]~~Abbreviations PID
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bigg Guru Join Date: Jun 2010 Posts: 1296 Good Answers: 104	#2 Re: Information About Abbreviations Used in P&IDs for Denoting Different Instruments 07/15/2013 4:40 PM
	There should always be a legend sheet with abbreviations and numbering schemes for equipment, instruments, piping, etc.
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#3 In reply to #2 Re: Information About Abbreviations Used in P&IDs for Denoting Different Instruments 07/15/2013 5:27 PM
	I'm betting OP has no instruments. Sounds more like homework to me. Or, maybe he's interviewing for an instrument tech job?
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#4 Re: Information About Abbreviations Used in P&IDs for Denoting Different Instruments 07/15/2013 5:38 PM
	I'd be curious how they get NZSC to stand for a limit switch.... And NPT to be other than National Pipe Thread. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#5 In reply to #4 Re: Information About Abbreviations Used in P&IDs for Denoting Different Instruments 07/15/2013 5:55 PM
	It's in code. You need a secret decoder ring. Be sure to drink your Ovaltine........................
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Phys Guru Join Date: Feb 2006 Location: middle of nowhere, Pennsylvania Posts: 2603 Good Answers: 63	#7 In reply to #4 Re: Information About Abbreviations Used in P&IDs for Denoting Different Instruments 07/17/2013 4:26 PM
	Just a guess, but ZSC is used as a valve travel limit switch quite frequently and there is usually an NO or NC associated with the valve, often posted on the P&ID nearly on top of each other. Did the op get two denotations run together and drop the O or C? The other less likely scenario is the valve is valve N so the limit switch would be NZSC? __________________ Remember when reading my post: (-1)^½ m (2)^½
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Iris Guru Join Date: Jul 2010 Posts: 669 Good Answers: 176	#6 Re: Information About Abbreviations Used in P&IDs for Denoting Different Instruments 07/15/2013 11:11 PM
	The ISA-5.1-1984 (R1992), Formerly ANSI/ISA-5.1-1984 (R1992) standard's table 2 is one page, "Typical Letter Combinations" Unfortunately, copyright restrictions prohibit its reproduction.
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bigg (1); Iris (1); lyn (3); Phys (1); Tornado (1)

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