1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 2 2015 08 17 Revised See Summary of Revisions A. Patti, G. Kowalski NA 2015 01 08 Revised See Summary of Revisions A. Patti, G. Kowalski NA 2012 08 23 Released G. Kowalski, NA Controlled document at www.MATS Copyright 2015, Ford Global T
2、echnologies, LLC Page 1 of 3 TETRAFLUOROPROP-1-ENE (R-1234yf) REFRIGERANT WSS-M17B21-A 1. SCOPE The material defined by this specification is a liquefied flammable hydrofluoro-olefin (HFO) gas (2, 3, 3, 3-tetrafluoroprop-1-ene) refrigerant also referred to as R-1234yf or HFO-1234yf. 2. APPLICATION T
3、his material is being released for use in automotive air conditioning applications. Generally, this will be the replacement refrigerant for HFC-134a in approved new systems. However, this is not for drop in use with systems already using HFC-134a under any circumstances. 2.1 LIMITATIONS For service
4、fill, R-1234yf refrigerant should not be mixed with HFC-134a refrigerant. Critical solution temperature for compressor lubricants should be 25 C. Testing for compatibility is recommended. Do not use R-1234yf with Fluorocarbon (FKM) rubber. Neoprene and HNBR are acceptable materials for use with R-12
5、34yf refrigerant. R-1234yf refrigerant is a flammable gas. Follow precautions in the MSDS. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 APPEAR
6、ANCE Clear, colorless liquid gas with a slight odor 3.3 LIQUID PHASE REQUIREMENTS 3.3.1 HFO-1234yf 99.5 wt% (w/w) min Gas Chromatography Method AHRI-700 or similar 3.3.2 HFO-1225ye 150 ppm (w/w) max Gas Chromatography Method AHRI-700 or similar 3.3.3 HFO-1234ze 1000 ppm (w/w) max Gas Chromatography
7、Method AHRI-700 or similar 3.3.4 Unsaturated Volatile Impurities 40 ppm (w/w) max Gas Chromatography Method AHRI-700 or similar 3.3.5 Other Refrigerants 0.5 wt% (w/w) max Gas Chromatography Method AHRI-700 or similar ENGINEERING MATERIAL SPECIFICATION WSS-M17B21-A Copyright 2015, Ford Global Technol
8、ogies, LLC Page 2 of 3 3.3.6 Water Content 20 ppm (w/w) max AHRI 700 Method or similar 3.3.7 Chlorides (or Halides) 3 ppm (w/w) max AHRI 700 Method or similar 3.3.8 Acidity, as HCl 1 ppm (w/w) max AHRI 700 Method or similar 3.3.9 High Boiling Residue 100 ppm (v/v) max AHRI 700 Method or similar 3.3.
9、10 Particulates/Solids Pass During the Boiling Range test, a measured amount of sample is evaporated from the Goetz bulb under controlled conditions. The particulates/solids shall be determined by visual examination of the empty Goetz bulb after the sample has evaporated completely. Presence of dirt
10、 rust or other particulate contamination is reported as “fail“. 3.4 VAPOR PHASE REQUIREMENTS 3.4.1 Non-Condensable gases in vapor phase 1.5 wt% (w/w) max (AHRI-700 or similar) 3.5 SHIPPING AND CONTAINER INFORMATION 3.5.1 Markings R-1234yf, 2, 3, 3, 3 Tetrafluoroprop-1-ene DOT Label Flammable gas CA
11、S number 754-12-1 Hazard class 2.1 (or per regulator guidance) 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 BOILING POINT,
12、at 760 mm Hg -29.4C (ASTM D2879 or ASTM D1719) 4.2 REFERENCE STANDARDS AHRI Standard 700-2014 Air-Conditioning, Heating, and Refrigeration Institute (AHRI) 2111 Wilson Blvd, Suite 500 Arlington, VA 22201 USA ENGINEERING MATERIAL SPECIFICATION WSS-M17B21-A Copyright 2015, Ford Global Technologies, LL
13、C Page 3 of 3 5. SUMMARY OF REVISIONS 2015 08 17 Para 3.3.1 was para. 3.4.2, moved from vapor phase to liquid phase Para 3.3.2 was para. 3.4.4, moved from vapor phase to liquid phase Para 3.3.3 was para.3.4.5, moved from vapor phase to liquid phase Para 3.3.4 was para.3.4.3, moved from vapor phase t
14、o liquid phase Para 3.3.5 added other refrigerants. Para 3.3.6 was para.3.3.1, changed test method Para 3.3.7 was para.3.3.2 Para 3.3.8 was para.3.3.3, changed test method Para 3.3.9 was para.3.3.4 Para 3.3.10 was para.3.3.5 2015 01 08 Para 3.4.5 Add Individual Volatile Impurities Exception Corrected Reference standard, 4.2.
