GMW GMW15449-2012 Pressure Testing of Non-metallic Fuel Tanks Issue 2 English.pdf
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1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW15449 Pressure Testing of Non-metallic Fuel Tanks Copyright 2012 General Motors Company All Rights Reserved September 2012 Originating Department: North American Engineering Standards Page 1 of 3 1 Scope Note: Nothing in this standard supercedes app
2、licable laws and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. This standard is used to determine the ability of a non-metallic fuel tank shell and fuel tank assemblies to maintain an applied pressure w
3、ithout leakage. This standard is called out by GMW3086. Refer to this standard or the pertinent technical specification for requirements. 1.2 Foreword. This is a component/subsystem level test only. Nothing in the standard supercedes vehicle level requirements. 1.3 Applicability. Fuel tank and fuel
4、tank assemblies. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. GMW3086 3 Resources 3.1 Facilities. Not applicable. 3.2 Equipment. 3.2.1 Air line or other equipment capable
5、of introducing pressure at a constant rate. 3.2.2 Pressure gage. 3.2.3 Timer with second hand. 3.2.4 Fuel tank fixture. 3.3 Test Vehicle/Test Piece. Fuel tank shell or fuel tank assembly. 3.4 Test Time. Not applicable. 3.5 Test Required Information. Not applicable. 3.6 Personnel/Skills. Not applicab
6、le. 4 Procedure 4.1 Preparation. When test is being performed for design verification, a minimum of six samples per cavity must be tested unless otherwise agreed to by GM Engineering. The sample quantity for all other usages must be agreed to by GM Engineering 4.1.1 Fuel Tank Shell. For design verif
7、ication, full dimensional requirements for tank shell must be measured prior to testing. 4.1.2 Fuel Tank Assemblies. For design verification of the tank assemblies, a minimum of the following measurements shall be made prior to testing: Copyright General Motors Company Provided by IHS under license
8、with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15449 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 2 of 3 4.1.2.1 Dimensional requirements for machined and welded tank
9、s assembly. 4.1.2.2 Dimensional requirements for Module Reservoir Assembly (MRA) related to the sealing surface. Any deviations to the preceding requirements must be agreed to by GM Engineering prior to testing. Note: The inlet check valve restrictor may be removed from the production tank assembly
10、to ensure the completion of the pressurization within the recommended 30 s. 4.1.3 Test Specimen Stabilization. Tank/tank assembly must be aged a minimum of 48 h prior to testing. 4.2 Conditions. 4.2.1 Environmental Conditions. Not applicable. 4.2.2 Test Conditions. Deviations from the requirements o
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