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ASHRAE Standard 15 Safety Standard for Refrigeration Systems (ANSI Approved), 2007
- FOREWORD
- 1. PURPOSE
- 2. SCOPE [Go to Page]
- 2.1
- 2.2
- 3. DEFINITIONS
- 4. OCCUPANCY CLASSIFICATION [Go to Page]
- 4.1
- 4.2
- 5. REFRIGERATING SYSTEM CLASSIFICATION [Go to Page]
- 5.1 Refrigerating Systems.
- 5.2 Refrigeration System Classification.
- 5.3 Changing Refrigerant.
- 6. REFRIGERANT SAFETY CLASSIFICATION [Go to Page]
- 6.1 Single-Compound Refrigerants.
- 6.2 Blends.
- 7. RESTRICTIONS ON REFRIGERANT USE [Go to Page]
- 7.1 General.
- 7.2 Refrigerant Quantity Limits.
- 7.3 Volume Calculations.
- 7.4 Location in a Machinery Room or Outdoors.
- 7.5 Additional Restrictions
- 8. INSTALLATION RESTRICTIONS [Go to Page]
- 8.1 Foundations.
- 8.2 Guards.
- 8.3 Safe Access.
- 8.4 Water Connections.
- 8.5 Electrical Safety.
- 8.6 Gas Fuel Equipment.
- 8.7 Air Duct Installation.
- 8.8 Refrigerant Parts in Air Duct.
- 8.9 Refrigerant Pipe Joint Inspection.
- 8.10 Location of Refrigerant Piping
- 8.11 Refrigerating Machinery Room, General Requirements.
- 8.12 Machinery Room, Special Requirements.
- 8.13 Manual Emergency Discharge of Ammonia Refrigerant. When required by the authority having jurisdiction, manual emergency dis...
- 8.14 Purge Discharge.
- 9. DESIGN AND CONSTRUCTION OF EQUIPMENT AND SYSTEMS [Go to Page]
- 9.1 Materials
- 9.2 System Design Pressure
- 9.3 Refrigerant-Containing Pressure Vessels
- 9.4 Pressure-Relief Protection
- 9.5 Setting of Pressure-Relief Devices
- 9.6 Marking of Relief Devices and Fusible Plugs
- 9.7 Pressure Vessel Protection
- 9.8 Positive Displacement Compressor Protection. When equipped with a stop valve in the discharge connection, every positive dis...
- 9.9 Pressure-Limiting Devices
- 9.10 Refrigerant Piping, Valves, Fittings, and Related Parts
- 9.11 Components Other Than Pressure Vessels and Piping
- 9.12 Service Provisions
- 9.13 Fabrication
- 9.14 Factory Tests
- 9.15 Nameplate.
- 10. OPERATION AND TESTING [Go to Page]
- 10.1 Field Tests
- 10.2 Declaration.
- 11. GENERAL REQUIREMENTS [Go to Page]
- 11.1 General Restrictions-Safeguards
- 11.2 Signs and Identification
- 11.3 Charging, Withdrawal, and Disposition of Refrigerants.
- 11.4 Containers.
- 11.5 Storing Refrigerant.
- 11.6 Maintenance.
- 11.7 Responsibility for Operation and Emergency Shutdown.
- 12. Precedence with Conflicting Requirements
- 13. Listed Equipment
- Informative APPENDIX A CALCULATIONS OF THE MAXIMUM ALLOWABLE CONCENTRATION (Cm) OF A BLEND [Go to Page]
- A1. FOR 100 LB OF BLEND, DETERMINE THE IDEAL GAS VOLUMES OCCUPIED BY EACH COMPONENT AND BY THE BLEND AT 70ËšF AND 1 ATM
- A2. Determine the dilution volume required for the 100 lb of blend and each component therein
- A3. Determine the maximum allowable concentration (Cm) of a blend
- Informative APPENDIX B GUIDELINES FOR EMERGENCY DISCHARGE OF REFRIGERANTS WHEN REQUIRED BY LOCAL CODES [Go to Page]
- B1. INTRODUCTION
- B2. Emergency Discharge Lines
- B3. Stop Valves
- B4. Sizing Valves and Lines
- B5. High- to Low-Pressure Valve
- B6. DIFFUSER
- B7. SIZING HEADERS AND DIFFUSERS
- B8. Location of Diffuser
- B9. Provide Drip Legs
- B10. Ammonia Diffusion Systems
- B11. Ammonia Discharge Lines
- B12. Ammonia Flares
- B13. Water Tanks
- B14. Basins
- B15. Ammonia-Water Mixers
- B16. Design Responsibility
- Normative APPENDIX C REFRIGERANT CLASSIFICATION SCHEME
- Informative APPENDIX D INFORMATIVE REFERENCES
- Normative APPENDIX E NORMATIVE REFERENCES
- Informative APPENDIX F METHOD FOR CALCULATING DISCHARGE CAPACITY OF POSITIVE DISPLACEMENT COMPRESSOR PRESSURE-RELIEF DEVICE
- Normative APPENDIX H ALLOWABLE EQUIVALENT LENGTH OF DISCHARGE PIPING
- Informative Appendix I Emergencies in Refrigerating Machinery Rooms [Go to Page]
- I1. Alarm Levels
- I2. Alternate Refrigerant Level Measurements
- I3. Reentry into Refrigerating Machinery Rooms
- I4. Example Emergency Procedures
- Informative appendix j addenda description information [Go to Page]
