This standard specifies the method of measuring the cleanliness of construction machinery fuel tanks by weight, including the measurement object, preparation, impurity collection, impurity measurement, impurity analysis and test report. This standard is applicable to the measurement of the cleanliness of construction machinery fuel tanks powered by internal combustion engines. JB/T 7157-1993 Method for measuring the cleanliness of construction machinery fuel tanks JB/T7157-1993 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T7157-93
Construction machinery
Method for determination of fuel tank cleanliness
Published on November 21, 1993
Ministry of Machinery Industry of the People's Republic of China
Implementation on March 1, 1994
Machinery Industry Standard of the People's Republic of China
Construction machinery
Method for determination of fuel tank cleanliness
1 Subject content and scope of application
JB/T 7157-93
This standard specifies the method for determining the cleanliness of construction machinery fuel tanks by weight, including the measurement object, preparation work, collection of impurities, determination of impurities, impurity analysis and test report. This standard applies to the determination of the cleanliness of fuel tanks of construction machinery powered by internal combustion engines. 2 Reference standards
JB/T7158
3 Terms
Guidelines for automobile cleanliness workTerms and terms
Methods for determining the cleanliness of engineering machinery partsThe terms used in this standard shall be in accordance with the provisions of JB4072.1.Determination object
Measurement of the fuel tank before assembly, and detection of all surfaces of the fuel tank in contact with the fuel. 5 Preparation work
5.1 According to the provisions of Chapter 5 of JB/T7158, make preparations for the personnel, environment and supplies before the determination. 5.2 The area around the fuel tank filling hole must be cleaned, and no external dirt should fall into the fuel tank during cleaning. 6 Collection of impurities
6.1 Remove the fuel tank filling hole cover without letting dirt fall into the fuel tank. 6.2 Inject cleaning fluid (NY-120 solvent oil) from the filling hole, and the injection amount shall be in accordance with the provisions of the table below. Install the oil filling hole cover, seal the other holes, lift the tank body with a lifting device and shake it fully, then pour the cleaned mixed liquid into the container. L
Fuel tank capacitywww.bzxz.net
Amount of cleaning liquid injected
6.3 Use a magnet to suck out the iron filings remaining in the fuel tank, remove other impurities, and then rinse it clean. Pour these remaining impurities and turbid liquid into the container.
6.4 Wash various utensils so that all the impurities on them are flushed into the turbid liquid. 6.5 Pour all the turbid liquid used to clean the fuel tank body and utensils into the same clean container for measurement. Approved by the Ministry of Machinery Industry on November 21, 1993
Implemented on March 1, 1994
7 Determination of impurities
7.1 Filtration
Turbid liquid filtration is divided into full liquid filtration and sampling filtration. JB/T7157—93
7.1.1 Full liquid filtration shall be carried out in accordance with the provisions of Article 7.1.1 of JB/T7158. 7.1.2 Sampling filtration shall be carried out in accordance with the provisions of Article 7.1.2 of JB/T7158. 7.2 Drying and weighing
Drying and weighing shall be carried out in accordance with the provisions of Articles 7.2.1 to 7.2.3 of JB/T7158; cleanliness calculation shall be carried out in accordance with the provisions of Article 7.3. 8
Impurity analysis
Impurity analysis shall be carried out in accordance with the provisions of Chapter 8 of JB/T7158. Test report
Fill in the cleanliness determination and analysis report according to the provisions of Chapter 9 of JB/T7158". Additional notes:
This standard was proposed and managed by Tianjin Engineering Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by Tianjin Engineering Machinery Research Institute and Shenyang Bridge Factory of the Ministry of Railways. The main drafters of this standard are Hong Xiuwen and Liu Minxian.
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