Refrigerant safety standards published

ASHRAE’s refrigerants-related standards, Standard 34: Designation and Safety Classification of Refrigerants, and Standard 15: Safety Standard for Refrigeration Systems, have been published.

02/03/2014


The 2013 editions of ASHRAE's major refrigerants-related standards, incorporating 41 new addenda, have been published.

Requirements in ANSI/ASHRAE Standard 34-2013, Designation and Safety Classification of Refrigerants, and ANSI/ASHRAE Standard 15-2013, Safety Standard for Refrigeration Systems, complement each other in that Standard 34 describes a shorthand way of naming refrigerants and assigns safety classifications based on toxicity and flammability data. Standard 15 establishes rules for safe application in equipment and systems when the refrigerant classification system. ASHRAE sells the standards as a set.

Standard 34-2013 contains the 2010 standard and 36 published addenda. Among the key changes incorporated into the standard are:

  • Assignment of designations and safety classifications for one new single compound refrigerant and 14 new refrigerant blends.
  • Changed the refrigeration concentration limits (RCL) values of 19 refrigerants listed in the 2010 standard to comply with more current methodology.
  • Changed the flammability safety classifications of four refrigerants from Class 2 to Subclass 2L, based on optional burning velocity measurement data.
  • Added Toxicity Code Classification assignments for 18 refrigerants that had been unassigned in the 2010 standard.
  • Clarified methodology for conducting flammability tests and for determination of fractionated compositions for flammability testing.
  • Updated methodology by which the heat of combustion is calculated for refrigerant blends, and provided heat of combustion calculation examples for refrigerant blends.
  • Defined requirements that applicants shall provide evidence of the existence of an azeotropic blend, if requesting an R-500 series designation.
  • Modified sections of the standard to add bubble-point and dew-point definitions and test conditions, clarified applicant documentation requirements related to GLP compliance and added critical pressure data and specific volume calculation methodology for applicant submissions.

Standard 15 contains the 2010 standard plus five published addenda. Key changes to the standard include:

  • Clarification of the location requirements for machinery room mechanical ventilation.
  • Clarification that design pressure is expressed in terms of relative pressure or gauge pressure (not absolute pressure).
  • Wording to ensure the standard more closely harmonizes with the 2012 International Mechanical Code (IMC) section 1101.10.


No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Mobile HMI; PID tuning tips; Mechatronics; Intelligent project management; Cybersecurity in Russia; Engineering education; Road to IANA
Save energy with automation; Process control system upgrades; Dispelling controll myths; Time-sensitive networking; Control system integration; Road to IANA
Additive manufacturing advancements; Machine vision enhances robotics; Fieldbus evolution; Process safety; Advice from System Integrators of the Year; Road to IANA
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Flexible offshore fire protection; Big Data's impact on operations; Bridging the skills gap; Identifying security risks
The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance
Getting to the bottom of subsea repairs: Older pipelines need more attention, and operators need a repair strategy; OTC preview; Offshore production difficult - and crucial
click me