ASHRAE safety standards available on IIAR website from June 2011

By Sabine Lobnig, Jun 21, 2011, 13:03 1 minute reading

In June 2011 ANSI/ASHRAE safety standard 15-210 for refrigeration systems and standard 34-2010 for the designation and safety classification of refrigerants, were made available on the IIAR website, helping promote safer refrigeration systems. 

ASHRAE/ANSI Standard 15 establishes procedures for operating equipment and systems when using the refrigerants specified in Standard 34, while Standard 34 describes a shorthand way of naming refrigerants and assigns safety classifications based on toxicity and flammability data. 
The standards are offered by ASHRAE as a set, and add new refrigerant blends to the set of standards published in 2007.
Here are highlights of what’s new in each:
ANSI/ASHRAE Standard 15-2010
Safety Standard for Refrigeration Systems 
  • Revisions to align the standard with UL 984 (Hermetic Refrigerant-Motor Compressors)
  • Revised requirements for terminating relief vent discharge lines 
  • Guidance for protection of positive-displacement compressors in cascade systems
  • Added definitions to better provide for safety of cascade refrigeration systems
  • Revisions to align with Standard 34
ANSI/ASHRAE Standard 34-2010 
Designation and Safety Classification of Refrigerants
  • Occupational exposure limits for refrigerants
  • Designations and safety classifications for 1 new single-compound refrigerant and 14 new refrigerant blends
  • Data and updates of refrigerant concentration limits (RCL) and safety classifications for several existing refrigerants
  • Modified method of calculating the heat of combustion for refrigerants (includes example calculation)
  • Added, optional 2L subclass in Class 2 flammability classification for refrigerants with a burning velocity less than or equal to 10 cm/s
  • Informative appendix with example calculation of the acute toxicity exposure Limit and refrigerant concentration limit for a refrigerant blend
ASHRAE the American Society of Heating, Refrigeration and Air-Conditioning Engineers is a non-profit international organization founded in 1894. Its stated mission is the advancement of “the arts and sciences of heating, ventilation, air conditioning and refrigeration to serve humanity and promote a sustainable world.” ASHRAE publishes voluntary consensus standards for Method of Measurement or Test, Standard Design and Standard Practice.


By Sabine Lobnig

Jun 21, 2011, 13:03

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