Piping and Equipment Identification Labels

Mechanical - Plumbing Piping System Abbreviations and Letter - Tags and Label Coloring

Abbreviation and letter - label coloring based on ASME A13.1 - 2007 Scheme for the Identification of Piping Systems:

Label Abbreviation System, Pipe Contents Label Colors
(Background - Text)
CHWR Chilled Water Return Green - White
CHWSChilled Water Supply Green - White
CWRCondenser Water Return Green - White
CWSCondenser Water Supply Green - White
FORFuel Oil Return Yellow - Black
FOSFuel Oil Supply Yellow - Black
HPCHigh Pressure Condensate Blue - White
HPS High Pressure Steam (above 125#) Blue - White
HWRHot Water Heating Return Green - White
HWSHot Water Heating Supply Green - White
LPCLow Pressure Condensate Blue - White
LPSLow Pressure Steam (below 25#) Blue - White
MPCMedium Pressure Condensate Blue - White
MPSMedium Pressure Steam
(above 25# - below 125#)
Blue - White
PCRPumped Condensate Return Blue - White
ACIDAcid Waste Orange - Black
BRBrine Water Orange - Black
FIREFire Suppression Water Red - White
HAZ Hazardous Waste Orange - Black
DI or ROHigh Purity Water Green - White
DCWPotable Cold Water Green - White
DHWPotable Hot Water Supply Green - White
DHWRPotable Hot Water Return Green - White
NGNatural Gas Yellow - Black
LN2Nitrogen (liquid) Black - White
Med Air Medical air Yellow - Black
CO2 Carbon dioxide Gray - White
He Helium Brown - White
N2Nitrogen Black - White
N2O Nitrous oxide Blue - White
O2Oxygen Green - White
Med Vac Medical?surgical vacuum White - Black
WAGD Waste anesthetic gas disposal Violet - White
Lab AirLaboratory air Yellow and White checkerboard - Black
Lab Vac Laboratory vacuum White and Black checkerboard - Black boxed
IA Instrument air Red - White
CFHEChemical Fume Hood Exhaust Purple - White
BCE Biosafety Cabinet ExhaustPurple - White
RERadioisotope Exhaust Yellow - magenta
ETOEETO Exhaust Purple - white

ASME A13.1 - 2007 Scheme for the Identification of Piping Systems - is intended to establish a common system to assist in identification of hazardous materials conveyed in piping systems and their hazards when released in the environment -concerns identification of contents of piping systems in industrial and power plants - recommended for the identification of piping systems used in commercial and institutional installations and in buildings used for public assembly.

Related Topics

  • Codes and Standards - Piping codes and standards - ASME, ANSI, ASTM, AGA, API, AWWA, BS, ISO, DIN and more..
  • Design Strategies - Piping systems and design strategies - documentation, P&ID, flow diagrams - capacities and limits

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