1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW5038 Refrigerant 1,1,1,2-Tetrafluoroethane, HFC-134a Copyright 2012 General Motors Company All Rights Reserved March 2012 Originating Department: North American Engineering Standards Page 1 of 4 1 Scope 1.1 Material Description. This specifi
2、cation covers the overall requirements for 1,1,1,2-tetrafluoroethane refrigerant (also known as HFC 134a or R134a) used in General Motors (GM) mobile air conditioning systems. 1.2 Symbols. Not applicable. 1.3 Typical Applications. As a refrigerant in automotive air conditioners. 2 References Note: O
3、nly the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ANSI/ASHRAE 34 ASTM D2109 ASTM D2879 SAE J2776 ANSI/ASHRAE 97 ASTM D2111 ASTM E1064 2.2 GM Standards/Specifications. GMW3059 2.3 Additional References. TMC003 Material Safety Data Shee
4、t guidance documents (available at ). 3 Requirements 3.1 Requirements on Delivery. 3.1.1 Chemical Requirements. Refrigerants approved and supplied to this specification shall have the chemical property values conforming to the established limits shown in Tables 1 and 2. No sample for testing and app
5、roval to this specification shall be taken until the contents of the container have been mixed to ensure uniformity of the liquid phase and equilibrium with the gas phase. 3.1.2 Mechanical Requirements. Not applicable. 3.1.3 Physical Requirements. Refrigerants approved and supplied to this specifica
6、tion shall have no flash point and shall meet the physical performance requirements shown in Table 3. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING
7、STANDARDS GMW5038 Copyright 2012 General Motors Company All Rights Reserved March 2012 Page 2 of 4 Table 1: Liquid Phase Contaminants (Maximum Limits) Contaminants Test Method Units Value Water Content ASTM E1064 ppm Note 1 10 maximum. Acidity Neutralization Note 2 ppm Note 1 1 maximum Halides Speci
8、fic ion electrode or potentiometric titration Note 2 ppm Note 1 0.1 Other Refrigerants Gas Chromatography Note 3 ppm Note 1 1960 Total Unsaturates Gas Chromatography Note 3 ppm Note 1 40 Non-volatile residue Gas Chromatography Note 3 ppm Note 1 v/v 100 Note 1: Parts per million (ppm) shall mean part
9、s per million by mass (e.g., microgram per gram) Note 2: Alternate analytical procedure for acidity and halides. Acidity and halides may be determined together via Aqueous Conductivity as Hydrochloric acid, ppm. Note 3: These organic impurities must be identified and must not be harmful to mobile ai
10、r-conditioning systems as judged by ANSI/ASHRAE 97 Sealed Tube Testing in the presence of iron, copper, aluminum and GM approved HFC-134a lubricant. Table 2: Vapor Phase Contaminants (Maximum Limit) Properties Test Method Units Value Non-condensable Gases Gas Chromatography Volume % 1.5 Table 3: Phy
11、sical Performance Requirements Properties Test Method Units Value Appearance Visual Clear, colorless, liquefied gas Purity: as HFC-134a as HFC-134a + HFC-134 Gas Chromatography % by wt. 99.7 (minimum) 99.8 (minimum) Boiling Point (at 760 mm Hg) Reference only ASTM D2879 C -26.2 High boiling residues
12、 ASTM D2109 % by volume 0.01 maximum Density at 25 C ASTM D2111 kg/dm3 1.19 to 1.21 3.1.4 Additional Requirements. 3.1.4.1 Label Requirements. Containers of material supplied to this specification shall, for ready identification of contents, prominently display the refrigerant number 134a (ANSI/ASHR
13、AE 34) and other labeling requirements as outlined in SAE J2776. 3.2 Processing Requirements. Not applicable. 3.3 Performance Requirements. GM reserves the right to require any additional tests that may be deemed necessary to ensure satisfactory vehicle component performance with candidate refrigera
14、nts submitted for approval. 3.4 Requirements on Other Stages During Life Cycle. Not applicable. 4 Manufacturing Process Not applicable. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from
15、 IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW5038 Copyright 2012 General Motors Company All Rights Reserved March 2012 Page 3 of 4 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country of usage. 5.2 La
16、nguage. In the event of conflict between the English and domestic language, the English language shall take precedence. 5.3 Inspection and Rejection. Samples of components or materials released to a GM material specification shall be tested for conformity with the requirements of this material speci
17、fication and approved by the responsible Engineering department prior to commencement of delivery of bulk supplies. A new approval must be received for any changes, e.g., properties, manufacturing process, location of manufacture, etc. If not otherwise agreed, all testing and documentation normally
18、required for initial release must be completed. It is the responsibility of the supplier to inform the customer in a timely manner, without solicitation, and to include documentation of all modifications of materials and/or processes and to apply for a new release. If not otherwise agreed, all relea
19、se tests shall be repeated and documented by the supplier prior to commencement of delivery of non-conforming bulk supplies. In individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.4 Initial Source Approval. No shipments shall be made b
20、y any supplier until representative initial production samples have been approved by the appropriate Materials Engineering department(s) as meeting the requirements of this specification. 5.5 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submissions, or when a change in
21、chemical composition of an existing product has occurred, a complete copy of the Material Safety Data Sheet/Safety Data Sheet must be submitted in compliance with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requirements or other country-specific MSDS/SDS requirem
22、ents. In addition, product MSDS/SDS submissions must be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.6 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted and
23、Reportable Substances for Parts. 5.7 Safety. This standard may involve hazardous materials, operations, and equipment. This standard does not propose to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety a
24、nd health practices and to determine the applicability of regulatory limitations prior to use. 6 Approved Sources Engineering qualifications of an approved source are required for this standard. Only sources listed in the GM Materials File (GM Supply Power) under this standard number have been quali
25、fied by Engineering as meeting the requirements of this standard. For other GM locations, the responsible Engineering group should be contacted to obtain the approved source in that individual country. The approval of suppliers to this specification will be executed for GM South America by GM Brazil
26、 Materials Engineering, for GM Europe by GME ITDC Chassis, for GM Holden by GM Holden Materials Engineering. 7 Notes 7.1 Glossary. 7.2 Acronyms, Abbreviations, and Symbols. GHS Globally Harmonized System of Classification and Labeling of Chemicals GSSLT Global Subsystem Leadership Team MSDS Material
27、 Safety Data Sheet ppm parts per million SDS Safety Data Sheet Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW5038 Copyright 2012 Genera
28、l Motors Company All Rights Reserved March 2012 Page 4 of 4 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW5038 9 Release and Revisions This standard was originated in October 2000. It was first approved by the Global Materials Manag
29、ement Team in July 2007. It was first published in July 2007. Issue Publication Date Description (Organization) 1 JUL 2007 Initial publication. 2 MAR 2012 Update template, references. (Fuels, Fluids and Lubricants GSSLT) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
