ASHRAE 34 : 2013

Foreword
1 Purpose
2 Scope
3 Definitions of Terms
4 Numbering of Refrigerants
5 Designation
6 Safety Group Classifications
7 Refrigerant Concentration Limit (RCL)
8 Refrigerant Classifications
9 Application Instructions
10 References
Informative Appendix A: Isomer Designation Examples
Normative Appendix B: Details of Testing - Flammability
Informative Appendix C: Bibliography
Informative Appendix D: Refrigerant Data (Informative)
Informative Appendix E: Toxicity and Flammability Data
                        for Single-Compound Refrigerants
Informative Appendix F: Example calculations for heats of
                        combustion
Informative Appendix G: Calculation of RCL and ATEL for blends

Provides an unambiguous system for numbering refrigerants and assigning composition-designating prefixes for refrigerants.