1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16638 Synthetic Polyalkylene Glycol (PAG) Lubricant for R1234yf Refrigerant Copyright 2012 General Motors Company All Rights Reserved June 2012 Originating Department: North American Engineering Standards Page 1 of 5 1 Scope 1.1 Material Des
2、cription. This specification defines the minimum acceptable requirements for synthetic Polyalkylene Glycol (PAG) lubricants for use in GM mobile air conditioning systems designed for HFO 1234yf refrigerant. This specification applies only to PAG lubricants approved for use in service. 1.2 Symbols. N
3、ot applicable. 1.3 Typical Applications. Not applicable. 1.4 Remarks. Not applicable. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASHRAE 97 ASTM D974 ASTM D93 ASTM D1744 ASTM D97 ASTM D2270 ASTM D445 ASTM D32
4、33 2.2 GM Standards/Specifications. GMW3059 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). Part Number 9986364: PAG-PSD1 Part Number 9986365: PAG-46 Part Number 9986366: PAG-ND12 Part Number 9273590: SP-A2 3 Requirements 3.1 Requirements on Delivery.
5、 No shipment shall be made by any supplier until representative initial production samples have been approved by engineering as meeting the requirements of this specification. 3.2 Chemical Requirements. This specification does not restrict the chemical structure of the polymer. Any proportion of the
6、 ethylene/propylene oxide units may be used in the base polymer. Starting or terminating groups or functionalities may vary as necessary to meet the requirements listed in this specification. 3.3 Physical Requirements. The lubricant shall meet the requirements shown in Table 1. 3.3.1 Purity. The lub
7、ricant shall be a clear, transparent liquid. There shall be no particulates or turbidity present. Ash content of the base stock (exclusive of additives) shall be less than 0.01% by mass. 3.3.2 Water absorption. The rate of water absorption (21 days) for the fluid at 21 C, 80% Relative Humidity (RH)
8、shall not exceed 10 000 parts per million (ppm) when exposed in an open service container at a surface-to-volume ratio of 3.0. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
9、GM WORLWIDE ENGINEERING STANDARDS GMW16638 Copyright 2012 General Motors Company All Rights Reserved June 2012 Originating Department: North American Engineering Standards Page 2 of 5 Table 1: PAG Oil Requirements Properties Requirements Test Methods Viscosity at 100 C 8.5 to 11.5 mm/s ASTM D445 Vis
10、cosity at 40 C 46 3 mm/s ASTM D445 Viscosity Index 175 minimum ASTM D2270 Flash Point 150 C minimum ASTM D93 Total Acid Number 0.1 maximum mg KOH/g ASTM D974 Pour Point Not above - 35 C ASTM D97 Water Content, As received 700 ppm maximum ASTM D1744 Solubility in R-1234yf At 3% weight. lubricant At 1
11、0% weight lubricant 43 C minimum 30 C minimum See Solubility Curve in Appendix A Sealed Tube Stability Fe:IRON 3, Cu Copper: 2, Al:Aluminum 2 0.5% maximum R1234yf decomposition TAN 2000 ppm and two aging temperature/time settings (190 C/24 hours and 175 C/14 days). The resulting Total Acid Number sh
12、all be less than 3.0 mg KOH/g (Table 1). 3.8 Additional Testing. GM reserves the right to require any additional tests that may be deemed necessary to ensure satisfactory performance of candidate lubricants submitted for approval. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 L
13、egal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country of usage. 5.2 Language. In the event of conflict between the English and domestic language, the English language shall take precedence. Copyright General Motors Company Provided
14、by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLWIDE ENGINEERING STANDARDS GMW16638 Copyright 2012 General Motors Company All Rights Reserved June 2012 Originating Department: North American Engineering Standar
15、ds Page 3 of 5 5.3 Inspection and Rejection. All shipments of material or parts under contract or purchase order manufactured to this specification shall be equivalent in every respect to the initial samples approved by Engineering. There shall be no changes in either formulation or manufacturing pr
16、ocesses permitted without prior notification and approval by Engineering. Lack of notification by the supplier constitutes grounds for rejection of any shipment. While samples may be taken from incoming shipments and checked for conformance to this specification, the supplier shall accept the respon
17、sibility for incoming shipments meeting this specification without dependence upon purchasers inspection. The series of tests used to approve each batch of product along with acceptance limits will be agreed upon by the purchaser and seller. The laboratory providing the certificate of analysis must
18、also participate in a proficiency testing program (round robin) that is approved by the Fuels, Fluids, and Lubricants Global Subsystem Leadership Team (GSSLT) or designate. The Fuels, Fluids, and Lubricants GSSLT or designate must receive copies of the proficiency testing reports directly from the t
19、est program administrator. 5.4 Initial Source Approval. No shipment shall be made by any supplier until representative initial production samples have been approved by the Fuels, Fluids, and Lubricants Global Subsystem Leadership Team or designees meeting the requirements of this specification. 5.5
20、Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submissions, or when a change in 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 Syste
21、m of Classification and Labeling of Chemicals (GHS) requirements or other country-specific MSDS/SDS requirements. 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 availabl
22、e. 5.6 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Engineering qualifications of an approved source are required for this standard. Only sources listed in the GM Materials File (i.e., MATSPC)
23、 under this standard number have been qualified 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. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM A
24、pproved Materials for corresponding GM Engineering Standards 7.2 Acronyms, Abbreviations, and Symbols. A/C Air Conditioning AISI American Iron and Steel Institute Al Aluminum ASHRAE American Society of Heating, Refrigeration and Air Conditioning Engineers Cu Copper Fe Iron GHS Globally Harmonized Sy
25、stem of Classification and Labeling of Chemicals GSSLT Global Subsystem Leadership Team HFC Tetrafluoroethane HFO Hydrofluoro-olefin Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IH
26、S-,-,-GM WORLWIDE ENGINEERING STANDARDS GMW16638 Copyright 2012 General Motors Company All Rights Reserved June 2012 Originating Department: North American Engineering Standards Page 4 of 5 KOH Potassium Hydroxide MSDS Material Safety Data Sheet PAG Polyalkylene glycol ppm parts per million RH Relat
27、ive Humidity SDS Safety Data Sheet TAN Total Acid Number 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW16638 PAG Oils: 9986364, 9986365, 9986366, 9273590 9 Release and Revisions This standard was originated in June 2011. It was firs
28、t approved by the Fuels, Fluids, and Lubricants GSSLT in June 2012. It was first published in June 2012. Issue Publication Date Description (Organization) 1 JUN 2012 Initial publication. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reprod
29、uction or networking permitted without license from IHS-,-,-GM WORLWIDE ENGINEERING STANDARDS GMW16638 Copyright 2012 General Motors Company All Rights Reserved June 2012 Originating Department: North American Engineering Standards Page 5 of 5 Appendix A: Table A1: R1234yf/PAG Oil Solubility Curve Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
