Ammonia Pipe Marking Guide April 2014

AMMONIA REFRIGERATION SYSTEM PIPE MARKING GUIDE In compliance with the International Institute of Ammonia Refrigeration (IIAR) Standards Ammonia Pipe Markers have five important components: Abbreviations, Physical State, Marker Body, Pressure Level & Flow Direction AMMONIA HTRS 5 1 ABBREVIATIONS 1 2 2 • Abbreviations for Ammonia System Components • Printed in black on yellow 3 PHYSICAL STATE • LIQ = Liquid (black or white printed on orange) • VAP = Vapor (black or white printed on blue) • LIQ/VAP - If both states exist, use both BD = Booster Discharge 4 3 MARKER BODY • AMMONIA • Printed in black on yellow 5 4 PRESSURE LEVEL • HIGH (black or white printed on red) • LOW (black or white printed on green) VAP HTRL = High Temp Recirculated Liquid HIGH VAP HSS = High Stage Suction HIGH VAP HSD = High Stage Discharge HIGH LIQ HPL = High Pressure Liquid LOW VAP HGD = Hot Gas Defrost HIGH VAP ES = Economizer Suction HIGH LIQ DC = Defrost Condensate LOW LIQ CD = Condenser LOW AMMONIA LIQ HTRS = High Temp Recirculated Suction LOW LIQ/VAP LIQ HIGH VAP LOW LIQ LOW LIQ/VAP LOW VAP HIGH LIQ/VAP HIGH LIQ LIC = Liquid Injection Cooling LOW HIGH LSS = Low Stage Suction LTRL = Low Temp Recirculated Liquid LTRS = Low Temp Recirculated Suction RV = Relief Vent TSR = Thermosyphon Return TSS = Thermosyphon Supply 5 FLOW DIRECTION • Indicates the direction of flow of the system contents • Place arrows at one or both ends of the Pipe Marker This guide is for general information purposes only. It is not a substitute for review of applicable laws and standards. PIPE MARKER SIZE SPECIFICATIONS Label size, text height, and placement should follow ANSI / ASME A13.1 guidelines. .75" - 1.25" (19mm - 32mm) (38mm - 51mm) (64mm - 152mm) MINIMUM LENGTH OF LABEL (field color) 8" (203mm) 8" (203mm) 12" (305mm) 24" (610mm) 32" (813mm) MINIMUM HEIGHT OF LETTERS 0.5" (13mm) 0.75" (19mm) 1.25" (32mm) 2.5" (64mm) 3.5" (89mm) OUTSIDE PIPE DIAMETER (including covering) 1.5" - 2" 2.5" - 6" Creative Safety Supply 8" - 10" (203mm - 254mm) OVER 10" (over 254mm) | phone: [phone] | fax: [phone] www.creativesafetysupply.com | email: [email protected]