ASHRAE has established a new 2L subclassification for refrigerant flammability to address new next-genera- Safety Classification of Refrigerants Approved by the ASHRAE Standards Committee on June 25, 2011; by the ASHRAE Board of Directors on June 29, 2011; and by the American National Standards Institute on June 30, 2011. ANSI/ASHRAE Standard 15-1994 uses only the safety classification for the worst case of fraction-ation for refrigerant blends and does not use the as for-mulated safety classification. Nearly all of the historically used refrigerants were flammable, toxic, or both. ASHRAE (American Society of Heating, Refrigerating and Air Conditioning Engineers) is a US organization devoted to advancing HVAC/R. �Ɋr ��gs�v��s��#�N`K�%��j�.W{O�����֭ۖ�h�m9�ب��+��GRC$���ŢD�P��B��9IoH���v�:si�/"��%zյ���mCz8JɂH�^���z`j�K�z�/;�/�~��g�W���`px���>#��6|��� ��?�{*���xJ� ]�jm��Q�1T!���";�f���Dl�(�_��e�������u�����8a��u͘~�B�Ќ( ������A��B$��Lk��8�rױ�d՚��F�(ݨrVk{��E:�u����u����u��Fkt��h �A���U593 �� f{4�aky��)��Ѵӳ�{�l4$�[,��i����TRO> z[劐 D���8}K#`l��W�P:���X�k�����f�����A��������h����q��~i. ant (R-125, ASHRAE Class 1). Eliminating the dual safety classification … Addendum c to ANSI/ASHRAE STANDARD 34-2001 1 (This foreword is not part of this addendum but is included for information only.) ASHRAE assigns numbers and safety classification to the refrigerants based on toxicity and flammability data submitted by the refrigerant’s producer. The 2013 editions of ASHRAE’s major refrigerants-related standards, incorporating 41 new addenda, have been published.. Safety Classification GWP HFC HF O IC C HFO FC ASHRAE STD 34 SAFETY CLASS REFRIGERANT TYPE Industrial Chemical HFC/HFO Blend HFC HFO A1 B2L A2 A3 A2L A1 0–10 10–200 200–1,500 1,500–2,500 > 2,500 A2L A2 A3 B2L Lower Toxicity No Flame Propagation Lower Toxicity Lower Flammability Lower Toxicity Flammable Lower Toxicity Higher Flammability Instead, we have opted for synthetic refrigerants such as CFCs, HCFCs, HFCs, and now HFOs. The standard also identifies requirements to apply for designations and safety classifications for refrigerants and to determine refrigerant concentration limits. Further information can be found in the latest version of Standard 34, available in the ASHRAE bookstore, and its published addenda, available on the Standards Addenda page. Tables listing the refrigerant designations, safety classifications and the refrigerant concentration limits are included based on data made available. a member of ASHRAE SSPC-15 safety Code for Mechanical Refrigeration, chair- man of the Designation and Nomenclature Subcommittee of SSPC-34 Designation and Safety Classification of Refrigerants, and chairman of the Task Group on Global Climate Change. The task of finding a nonflammable refrigerant with good stability was given to Thomas Midgley in 1926.With his associates Albert Leon Henne and Robert Reed McNary, Dr. Midgley observed that the refrigerants then in use c… The American Society of Heating, Refrigerating and Air-Conditioning Engineering (ASHRAE) Standard 34 classifies refrigerants by hazard based on toxicity and flammability. Examples of some ASHRAE Standards are: Standard 34 – Designation and Safety Classification of Refrigerants; Standard 55 – Thermal Environmental Conditions for Human Occupancy; Standard 62.1 – Ventilation for Acceptable Indoor Air Quality (versions: 2001 and earlier as … It should be noted that all substances can be toxic in sufficient amounts. Designation and Safety Classification of Refrigerants FOREWORD This addendum adds the single-component refrigerant R- 1132a to Tables 4-1, D-1, and E-1. • ASHRAE Standard 34 “Designation & Safety Classification of Refrigerants” - New ISO Standard 817 nearly mirrors Std 34. 1 0 obj<> endobj 2 0 obj<>stream %PDF-1.3 %���� ©2021 This website describes the activities of the ASHRAE Standing Standard Project Committee 34, Designation and Safety Classification of Refrigerants. ASHRAE STANDARDASHRAE STANDARD American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. 1791 Tullie Circle NE, Atlanta, GA 30329 www.ashrae.org Designation and Safety Classification of Refrigerants ANSI/ASHRAE Addenda i, j, and k to ANSI/ASHRAE … ASHRAE ADDENDAASHRAE ADDENDA ANSI/ASHRAE Addenda a, b, and d to ANSI/ASHRAE Standard 34-2010 Designation and Safety Classification of Refrigerants Approved by the ASHRAE Standards Committee on June 26, 2010; by the ASHRAE Board of Directors on June 30, 2010; and by the American National Standards Institute on July 1, 2010. Natural refrigerants and hydrocarbons, such as propane, are some of the cleanest and environmentally friendly options out there for air conditioning and refrigeration. ASHRAE 15. All refrigerant safety groups. Updates to relevant codes and standards are expected over the next two years. PHONE: 404-636-8400 FAX: 404-321-5478 E-mail: standards.section@ashrae.org Updated 6/10/2019, Shaping Tomorrow's Built Environment Today, Officers, Directors, Councils, Committees, Staff, Science and Technology for the Built Environment, Instructor-Led Training Seminar and Short Courses, Self-Directed Learning / Group Learning Texts, 2021 Virtual Design and Construction Conference, 2021 ASHRAE Building Performance Analysis Conference, IAQ 2020: Indoor Environmental Quality Performance Approaches, Criteria for Annual Conference City Selection, Winter, Annual, & Virtual Conference Sponsorship Opportunities, tetrafluoromethane (carbon tetrafluoride), R-12/114 (must be specified) (50.0/50.0) (60.0/40.0), R-125/134a/600a/600/601a (50.5/47.0/0.9/1.0/0.6), R-125/143a/134a/600a (63.2/18.0/16.0/2.8), R-32/125/134a/600/601a (8.5/45.0/44.2/1.7/0.6), R-32/125/134a/152a/227ea (31.0/31.0/30.0/3.0/5.0), R-32/125/1234yf/134a/1234ze(E) (26.0/26.0/20.0/21.0/7.0), R-32 /125 /1234yf /134a (24.3/24.7/25.3/25.7), R-32/125/1234yf/134a (25.2/24.3/23.2/27.3), R-32/125/1234yf/134a (20.0/20.0/31.0/29.0), R-32/125/134a/227ea/600/601a (20.0/20.0/53.8/5.0/0.6/0.6), R-32/125/134a/227ea/236fa (20.5/4.0/61.4/13.5/0.6), LTR 11: R-32/1234yf/1234ze(E) (21.0/69.0/10.0), LTR 10: R-32/125/134a/1234ze(E) (12.0/52.0/14.0/22.0), LTR4X10: R-32/125/134a/1234ze(E) (28.0/25.0/20.0/27.0), R-32/125/134a/1234ze(E) (2.5/2.5/46.0/49.0), R-125/143a/134a/227ea/600a (55.0/5.0/32.0/5.0/3.0), R-32/125/143a/134a/600 (9.0/42.0/2.0/44.0/3.0), R-744/32/125/1234yf/134a (6.0/36.0/30.0/14.0/14.0), R-32/125/1234ze(E)/227ea (27.0/27.0/40.0/6.0). (Supersedes ANSI/ASHRAE Standard 34-2013) Designation and Safety Classification of Refrigerants . A number of years ago, ASHRAE Standard 34 introduced a new flammability sub-classification called ‘2L’ and it looks like these ‘2L’ refrigerants are going to be a part of everyday life relatively soon. ASHRAE Standard 34-2016, Designation and Classification of Refrigerants, defines flammability in three separate classes: • Class 1 (No Flame Propagation); • Class 2 (Lower Flammability); and • Class 3 (Higher Flammability). ASHRAE Safety Classification: A1 AR5 Global Warming Potential (GWP): 573 ... R1150 is refrigerant grade ethylene (ethene), a natural, or "not in kind", refrigerant suitable for use in very low temperature refrigeration applications, such as those found in LNG liquefaction processes. It also establishes a system for assigning a safety classification to refrigerants based on toxicity and flammability data, and provides a means of determining the refrigerant concentration limit. However, over the past century America has had very little use of natural refrigerants. Refrigerant Classifications (Toxicity) •Refrigerants are classified by flammability and toxicity by the ASHRAE Standard 34 (ISO 817 in Europe and some other countries) Toxicity Classification A An OEL of 400ppm or greater B An OEL lessthan 400ppm Refrigerant Classifications (Flammability) Flammability Classification ASHRAE Standard 34, Designation and Safety Classification of Refrigerants, establishes a simple means of referring to common refrigerants rather than by their chemical name, formula, or trade name. These addenda were approved by a Standing Standard Project Committee (SSPC) for which the Standards Data and Safety Classifications for Refrigerant Blends Refrigerant Number =427A Composition (Mass %) = R-32/125/143a/134a/ (15.0/25.0/10.0/50.0) Composition Tolerances = (±2.0/±2.0/±2.0/±2.0) Safety Group =A1 Addendum j to 34-2004 This standard provides an unambiguous system for numbering refrigerants and assigning composition-designating prefixes for refrigerants. The tables contained on this page list approved refrigerant numbers from ANSI/ASHRAE 34-2019, Designation and Safety Classification of Refrigerants, the latest edition of Standard 34, which describes a shorthand way of naming refrigerants and assigns safety classifications based on toxicity and flammability data.*. The 2013 editions of ASHRAE’s major refrigerants-related standards, incorporating 41 new addenda, have been published. The key and the main difference between what is deemed as safe and what is viewed as toxic is the quantity or concentration needed to cause harm, and in some cases, the duration or repetition of exposure. This seminar provides information on the changes to standards that specify requirements for the use of 2L flammable refrigerants. The safety group classification for each refrigerant has two or three alphanumeric characters (e.g., B1 or A2L). Please refer to the latest edition of ASHRAE Standard 34 and all published addenda for complete information on refrigerant designations and safety classifications. The ASHRAE Standard 15 documentation establishes procedures for operating equipment and systems when using refrigerants- which are compiled in ASHRAE Standard 34 along with naming and safety classifications based on toxicity and flammability … Toxic effects have been observed in some of the most mundane substances such as water, salt, oxygen, and carbon dioxide but all of these were in extreme quantities. ASHRAE STANDARDASHRAE STANDARD American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. 1791 Tullie Circle NE, Atlanta, GA 30329 www.ashrae.org Designation and Safety Classification of Refrigerants ANSI/ASHRAE Addenda v and w to ANSI/ASHRAE Standard 34-2004 - Current proposal is to co-label and use 1 standard • Standard Purpose - Designation Identify all types of refrigerants short hand - R-123 instead of - 2,2 dichloro-1,1,1-trifluoroethane - Safety ASHRAE is not responsible for this site’s content. •Flammable or mildly flammable refrigerants will only be allowed for new systems; retrofit solutions will need to be non-flammable. ASHRAE Membership Info ©2021 This website describes the activities of the ASHRAE Standing Standard Project Committee 34, Designation and Safety Classification of Refrigerants. 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