ISA5.1, Instrumentation Symbols and Identification

The ISA5.1 subcommittee currently is in the process of revising and updating ISA-5.1-1984 (R1992), Instrumentation Symbols and Identification.

For more information about ISA5.1, contact Charley Robinson, ISA Standards.

ISA5.1 Scope

The standard is suitable for use whenever any reference to an instrument is required in the chemical, petroleum, power generation, air conditioning, metal refining, and numerous other industries.

The standard is intended to provide sufficient information to enable anyone reading a flow diagram and having a reasonable amount of plant knowledge to understand the means of measurement and control of the process without having to go into the details of the instrumentation that require the knowledge of an instrument specialist.

ISA5.1 Purpose

The purpose of this standard is to establish a uniform means of designating instruments and instrumentation systems used for measurement and control. To this end, a designation system is presented that includes symbols and an identification code.

The differing established procedural needs of various organizations are recognized, where not inconsistent with the objectives of the standard, by providing alternative symbolism methods. A number of options are provided for adding information or simplifying the symbolism, if desired.

List of Standards for Committee

Contacts:

Grover Allen Voting Member GE Energy Phone: (281) 864-2672	Allen Amdur Voting Member Amdur Enterprises Phone: (908) 273-5096 Fax: (908) 522-3231
Norman Baillie Information Member Saudi Aramco Phone: +966 3 878 9628 Fax: +966 3 878 9628	Gerald Barta Voting Member Foster Wheeler Phone: (713) 926-8153
Nabil Battikha Information Member BergoTech Inc Phone: (416) 456-7533 Fax: (905) 883-6202	Laurie Blackmore Information Member Gulfstream Engineering Phone: +44 410 450385 Fax: +44 1646 641506
E. Blahut Information Member Blahut Engineering Phone: (310) 212-2833	Boleslaw Boczkaj Voting Member
Craig Borel Information Member Spectrum Engineering Inc Phone: (713) 378-6600 Fax: (713) 378-6605	Ben Burdett Voting Member Burgoyne Phone: (801) 487-0186
James Carew Voting Member Chair	Lowell Christensen Voting Member Los Alamos National Lab Phone: (505) 667-4560 Fax: (505) 665-6050
Terry Claibourn Information Member Equilon Enterprises Phone: (314) 946-7322	John Dobbins Voting Member E I duPont Phone: (302) 737-0745 Fax: (302) 774-1352
Narinder Dogra Voting Member BAE Systems	J. Doyle Voting Member
Kenneth Drayton Voting Member Phone: (912) 284-9123	Walter Driedger Voting Member Colt Engineering Corp Phone: (403) 281-4775 Fax: (403) 212-8407
Larry Dupriest Information Member ExxonMobil Chemical Phone: (409) 860-2228	Andrew Engels Information Member Praxair Inc
Georg Erk Voting Member Phone: (609) 877-2315	Philip Evans Information Member SNC-Lavalin Inc Phone: (403) 241-6583
James Federlein Information Member Federlein & Assoc Inc Phone: (724) 941-4373	Steven Flynn Information Member Jacob Carter Burgess Phone: (817) 735-7049 Fax: (817) 735-6148
Ferrill Ford Information Member Emerson Process Management Phone: (512) 832-3270 Fax: (512) 832-3199	David Fraade Information Member Burroughs Wellcome Co Phone: (919) 830-2170
Don Frey Voting Member Reliatech Inc Phone: (612) 865-3690 Fax: (320) 251-1490	Patrick Fritz Information Member Associated Engineering Phone: (416) 622-9502 Fax: (416) 622-6249
J. Garrod Voting Member Golder Associates Phone: (303) 679-9666 Fax: (303) 679-9595	Ian Gibson Information Member Phone: +61 3 93798538
Lawrence Goettsche Information Member	Peter Green Information Member Peter Green Ltd Phone: (647) 308-5367 Fax: (647) 308-4319
Alex Habib Voting Member Consultant Phone: (732) 742-7913	Jimmy Hacker Information Member Eastman Chemical Co Phone: (870) 698-5502 Fax: (870) 698-5554
Ted Hamler Voting Member Hamler & Burch LLC Phone: (575) 647-1836	Ralph Hartman Voting Member Saudi Aramco Phone: +966 3 873 2858 Fax: +966 3 873 0037
Samuel Herb Voting Member JAOMAD Consultancy Phone: (215) 345-1464 Fax: (215) 345-4387	Wayne Holland Information Member CH2M Hill Phone: (770) 829-6848 Fax: (770) 829-6996
Stanley Hoo Information Member Washington Group Intl Phone: (609) 720-2760 Fax: (609) 720-3228	Erwin Icayan Information Member ACES Inc Phone: (509) 531-2408
Walter Ingham Information Member Stantec Consulting Ltd Phone: (780) 917-8536 Fax: (780) 917-8580	Alvin Iverson Voting Member Ivy Optiks Phone: (281) 420-7613
James (Jim) Jamison Voting Member EnCana Corporation Ltd Phone: (403) 463-6112	Farshid Jamshidi-Naghani Information Member Mountroyal College Fax: (403) 202-0165
Maurice Jordan Information Member Merrick & Co Phone: (303) 353-3681	Dennis Kelly Information Member Veco Rocky Mountain Inc Phone: (303) 792-2211
David Lancaster Information Member Bechtel Corp Phone: (713) 235-5283	Robert Larkan Information Member Jacobs Engineering Group Phone: (225) 768-5473 Fax: (225) 757-0057
Daniel Lee Voting Member ABB Inc Phone: (440) 585-6063 Fax: (440) 585-6020	William Mapes Information Member Phone: (716) 225-1382
Bill Maples Information Member PC&E Consulting Engineers Phone: (913) 469-6126	Thomas McAvinew Voting Member Managing Director I&C Engineering LLC Phone: (303) 665-5282
Gordon McFarland Information Member Emerson Process Mgmnt Power & Water Sol Phone: (706) 484-0570 Fax: (706) 484-0955	Norman McLeod Information Member ARKEMA Phone: (610) 878-6523 Fax: (610) 878-6253
Frederick Meier Voting Member	Richard Mergen Information Member
Ian Milne Voting Member Milne Enterprises Inc Phone: (403) 290-4724 Fax: (403) 290-4742	William Mostia Voting Member SIS-Tech Solutions Phone: (281) 334-3169
Stephen Mullen Information Member Bechtel Power Corporation Phone: (301) 228-8432 Fax: (240) 379-2758	Raymond Mulley Voting Member Raymond Mulley Engineering Phone: (905) 891-9390 Fax: (905) 891-9391
Thomas Myron Information Member Massachusetts Water Resources Phone: (617) 539-4166 Fax: (617) 539-4356	Gordon Pearce Voting Member E I du Pont Phone: (613) 544-6000
George Platt Information Member	Robert Rafferty Information Member E I du Pont Phone: (302) 773-2844 Fax: (302) 773-2844
Ganesier Ramachandran Voting Member Shell Global Solutions US Phone: (504) 465-6269 Fax: (504) 465-6068	David Rapley Information Member
Larry Rhodes Information Member Shell Global Solutions US Phone: (281) 544-7816 Fax: (281) 544-7246	Mark Robertson Voting Member Insyght Systems Inc Phone: (905) 483-3151 Fax: (905) 335-2045
Charles Robinson Staff Contact	David Roney Voting Member URS - Washington Division Phone: (303) 843-3681 Fax: (303) 843-2684
James Rutledge Information Member Jacksonville Electric Authority Phone: (904) 665-7949 Fax: (904) 665-7822	S. Sankaran Voting Member University of Technology Sidney Phone: +61 2 9514 8882 Fax: +612 9457 8051
Rolf Schulz Information Member Hinz Automation Inc Phone: (952) 432-7555	Jyotirmoy Sen Information Member Phone: (925) 945-7566
Rasik Shah Voting Member Mustang Engineering Inc Phone: (713) 983-7599	David Sloan Information Member Hatch Energy Phone: (905) 469-3400
Manish Sood Information Member	Thomas Stanley Information Member Day & Zimmerman Phone: (864) 241-8329
Fred Stearns Information Member URS Corp Washington Division Phone: (303) 843-2783 Fax: (303) 843-2208	Kevin Szafron Information Member BP Phone: (832) 661-0726 Fax: NA
John Taylor Information Member	Darrol Timmons Information Member
Mike Van Voorhis Information Member AVL North America	Jose Vazquez Information Member Invision Engineering Corp Phone: (787) 831-0070 Fax: 787-653-4800
Ian Verhappen Voting Member Industrial Automation Networks Inc Phone: (780) 842-4722 Fax: (780) 628-7352	Andrew Watson Information Member EnergySolutions Phone: (509) 375-9817 Fax: (509) 375-9986
Edith Welch Voting Member Duke Fluor Daniel Inc Phone: (281) 263-4376 Fax: (281) 263-5109	Robert Wood Voting Member NOVA Chemical Corp Phone: (281) 474-1022 Fax: (281) 474-1005
Swen Ytterman Information Member PIDAB Instrumentdesign AB Phone: (463) 127-3015 Fax: +46 31 7760489