seton.

com
Editable:

800.243.6624
Fax 800.345.7819 Email SetonUSA@seton.com
Signs, Labels & Solutions for a Safer Workplace
Outlined: PO Box 458, Buffalo, NY 14240-0458

PRODUCT DATA SHEET

IIAR Ammonia Pipe Marker
Reference Guide
Summary of IIAR Standard
The purpose of this standard, developed by the
International Institute for Ammonia Refrigeration
(IIAR) is to create a uniform system for
identification of ammonia refrigeration piping
and system components.

The pipe marker should have five sections:

1. Ammonia System Identification 3. Pressure Rating – The pressure level of the refrigerant
Wording “AMMONIA” in black letters on an orange background. located to the right of “AMMONIA”:
a. If High Pressure – Wording “HIGH” – in black letters on a red background
2. Physical State – The physical state of the b. If Low Pressure – Wording “LOW” - in black letters on a green background
refrigerant located to the left of “AMMONIA”:
a. If Liquid – Wording “LIQ” – 4 2 1 3 5
in black letters on an yellow background

LTRS AMMONIA
b. If Vapor – Wording “VAP” – in black letters L V L
on a blue background I A O
c. If Both – Wording “LIQ” “VAP” – both printed Q P W
in the colors designated above
Meets IIAR Bulletin No. 114 – revised March 2014
4. A
 mmonia System Abbreviations
Abbreviation System Abbreviation System Abbreviation System
BD Booster Discharge HG Hot Gas* MTS Medium Temperature Suction
BS Booster Suction HGD Hot Gas Defrost OD Oil Drain
CD Condenser Drain IPL Intermediate Pressure Liquid PO Pump Out
DC Defrost Condensate* LD Liquid Drain* PRG Purge*
ES Economizer Suction LIC Liquid Injection Cooling RV Relief Vent
EQ Equalizer* LT Liquid Transfer* SCL Sub-Cooled Liquid
FG Foul Gas* LSS Low Stage Suction TSR Thermosyphon Return
HPL High Pressure Liquid LTL Low Temperature Liquid TSS Thermosyphon Supply
HSD High Stage Disharge LTRL Low Temperature Recirculated Liquid TSV Thermosyphon Vent
HSS High Stage Suction LTRS Low Temperature Recirculated Suction
HTRL High Temperature Recirculated Liquid LTS Low Temperature Suction
*These piping descriptions are NOT included in
HTRS High Temperature Recirculated Suction MTRL Medium Temperature Recirculated Liquid
the IIAR standard
HTS High Temperature Suction MTRS Medium Temperature Recirculated Suction

5. Directional Flow Arrows – To indicate ammonia refrigerant flow direction, directional arrows are illustrated on the pipe marker.
2 of Seton’s 3 ammonia pipe marking options, Setmark® and Ultra-Mark® ammonia pipe markers, come with directional arrows on the marker.
The Opti-Code™ version does not include arrows. We recommend Arrows-On-A-Roll tape as an option.

Date: / / Job:
Contractor
BFDS2003/Advertising/Submittals/2015/P&V/IIAR Ammonia Pipe Marker Reference Guide