1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW15450 Internal Cleanliness 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
2、 applicable 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 procedure is used to determine the internal cleanliness of non-metallic fuel tanks. This includes measuring the amount of solid an
3、d soluble contaminants present in the tank. 1.2 Foreword. Not applicable. 1.3 Applicability. Fuel tanks. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. None 3 Resources 3.1
4、Facilities. Not applicable. 3.2 Equipment. 3.2.1 Duct tape or other heavy gage tape. 3.2.2 Vacuum tube or other suction device capable of drawing water out of fuel tank. 3.2.3 Graduated cylinder 500 mL. 3.2.4 Filter paper 500 m. 3.2.5 Glass beaker or pan with 500 mL capacity. 3.2.6 Ring stand. 3.2.7
5、 Glass funnel. 3.2.8 Scale or balance with 0.01 g accuracy. 3.2.9 Heat source such as Bunsen burner or hot plate. 3.2.10 pH meter or pH paper. 3.2.11 Air-circulating oven. 3.3 Test Vehicle/Test Piece. Production fuel tank. 3.4 Test Time. Not applicable. 3.5 Test Required Information. Not applicable.
6、 3.6 Personnel/Skills. Not applicable. 4 Procedure 4.1 Preparation. Not applicable. 4.2 Conditions. 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 ST
7、ANDARDS GMW15450 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 2 of 3 4.2.1 Environmental Conditions. Not applicable. 4.2.2 Test Conditions. Deviations from the requirements of this standard shall have been agreed upon. Such requirements shall be specified on componen
8、t drawings, test certificates, reports, etc. 4.3 Instructions. 4.3.1 Pour 500 mL of distilled water into the fuel tank, seal all openings with tape and agitate by hand to wet the entire inner surface. 4.3.2 Draw the water out of the tank with the suction device and return it to the 500 mL graduate c
9、ylinder. Measure volume to be certain that 95% of the water has been withdrawn from the tank. 4.3.3 Read and record the pH of the captured solution. 4.3.4 Weigh a piece of filter paper and record the weight. 4.3.5 Weigh a glass breaker or pan and record the weight. 4.3.6 Pour the water from the grad
10、uated cylinder through the pre-weighed filter paper and collect in the pre-weighed glass beaker or pan. Rinse the graduated cylinder with distilled water and pour through the filter paper. Rinse the filter paper with fresh distilled water. 4.3.7 Dry the filter paper in an oven, let cool to room temp
11、erature and reweigh the filter paper. The difference between this weight and the initial weight is recorded as the weight of solids in the tank. 4.3.8 Take the beaker of filtered water and boil until all the water has evaporated. Do not overdry. Cool to room temperature and reweigh the beaker. The d
12、ifference between this weight and the original weight of the beaker is the weight of the solubles in the tank. 5 Data 5.1 Calculations. 5.1.1 Calculate the weight of solids in the tank. Wt paper final - Wt paper initial = Wt solids. 5.1.2 Calculate the weight of solubles in tank. Wt beaker final - W
13、t beaker initial = Wt soluble. 5.2 Interpretation of Results. Not applicable. 5.3 Test Documentation. 5.3.1 Report results in grams. 5.3.2 Report pH of captured solution. 6 Safety This standard may involve hazardous materials, operations, and equipment. This standard does not propose to address all
14、the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbo
15、ls. Not applicable. 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Test to GMW15450 9 Release and Revisions This standard was originated in October 2006. It was first approved by the Global Plastics Committee in November 2006. It was first published
16、 in April 2007. 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 GMW15450 Copyright 2012 General Motors Company All Rights Reserved September
17、 2012 Page 3 of 3 Issue Publication Date Description (Organization) 1 APR 2007 Initial publication. 2 SEP 2012 Five year refresh of standard. (Plastics Global Subsystem Leadership Team) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
