Identification
Guide for
Ammonia Refrigeration Piping
Based
on labeling standards published by the
International Institute for ammonia Refrigeration (IIAR).
1. Use Arrows to Indicate
the Direction of Flow in the Pipe.
2. Use the Following
Abbreviations to Identify Ammonia System Components.
BD - Booster Discharge
CD - Condenser
DS - Defrost
Condensate
ES - Economizer
Suction
HGD - Hot
Gas Defrost
HPL - High
Pressure Liquid
HSD - High
Stage Discharge
HSS - High
Stage Suction
HTRL - High
Temperature Recirculated Liquid
High
Temperature Recirculated Suction
LTRL - Low
Temperature Recirculated Liquid
LTRS - Low
Temperature Recirculated Suction
LIC - Liquid
Injection Cooling
LSS - Low
Stage Suction
RV - Relief
Vent
TSR - Thermosyphon
Return
TSS - Thermosyphon
Supply
3. Indicate Whether
the Refrigerant is a Liquid, Vapor, or Both.
LIQ
- Orange Color Band Indicates Liquid State
AP
- Blue Color Band Indicates Vapor State
Use
both color bands if both liquid and vapor may be present.
4. Print "Ammonia"
in Black Letters on a Yellow Background.
5. Indicate Whether
the Internal Pipe Pressure is High or Low.
High
- Red Color Band Indicates High Pressure
Low
- Green Color Band Indicates Low Pressure
This guide is
intended for general information purposes only. This guide is not
a substitute for review of applicable government regulations and
standards.
