This standard specifies the definition of thermal shock, test equipment, specimens, test procedures, content and report. This standard is applicable to the determination of thermal shock resistance and thermal shock durability of containers made of soda-lime glass and low-boron soda-lime glass. GB 4547-1991 Test method for thermal shock resistance and thermal shock durability of glass containers GB4547-1991 Standard download decompression password: www.bzxz.net

Unc666.171.01
National Standard of the People's Republic of China
GB4547—91
Glass containers
Test methods for thermal shock resistance and thermal shuckenduranceGlass containersThermal shock resistance and thermal shuckendurance-Testmethods
Published on 19910518
Implemented on 1992-0301
Published by the State Administration of Technical Supervision
National Standard of the People's Republic of China
Glass containers
Test methods for thermal shock resistance and thermal shuckendurance
Glas contalners-Tbermal shock tesistaaceandthermalshoekendpranceTaslmethosGB4547-91
GB454-B
This standard adopts the international standard 1S:07459·194 glass container-heat decay resistance and heat spread durability-test method.
Subject content and applicable scope
This standard specifies the definition of flame retardancy, test instruments, test specimens, test procedures, contents and reports. This standard is applicable to the thermal shock resistance and thermal durability of glass made of soda lime glass and low ketone soda lime glass. 2 Definitions
2.t Resistance to hot liquid, the performance of glass containers that do not crack after drastic changes in humidity. 2.2 Thermal durability In the heat exposure test, the products with a temperature difference of 50< show cracking. 3.1 One cold water tank, the volume of which should ensure that there are at least seven grams of test glass per gram of test glass during the test. One water circulator, one thermometer, and one thermostat to ensure that the temperature is stable within 22°C when the low temperature exceeds 5°C. 3.2 One hot water tank, the volume of which should be the same as that of the cold water tank, one water circulator, one thermometer, and one thermostat to ensure that the temperature is stable within ±1°C.
33. Keep the test container in an upright position, do not press on the test point, do not scratch the surface of the sample, and the test container should be covered to prevent the container from being touched.
The sample should be a separate container for testing other properties (such as water, thermal properties, etc.). 5. Test steps
6.1 The sample should be placed in the test site first to ensure that the sample and the ambient temperature are the same. 5.2 At least one piece of water shall be added to each glass, cold water shall be added and hot water shall be added separately. The water shall pass through the sample part 50mm above the sample, adjust the water temperature to the lower limit of the specification, and keep the water temperature stable within 10℃. 5. Place the sample in the net and add hot water. The top of the test piece shall be 50mm below the water, adjust the water temperature to the upper limit of the specification, and keep the sample at the specified temperature for 5min.
5.4 Transfer the net with the filter to the cold water in the hot water condition within 15±1 hours, add all the water bottles, continue to add water for 3 hours, and remove the cold water from the net.
5.6 Check the cracking of each test column and determine the number of samples that have passed. Approved by the National Technical Supervision Commission on September 18, 1991 and implemented on March 1, 1992
6 Test content
6.1 Heat resistance test
6.t.1 Compliance test
GB4547-91
After the heat test is carried out according to the provisions: a temperature difference of 1/2, if the number of ruptures of the sample is less than a predetermined number, it is judged to be qualified. 6.t.2 Increase resistance test
Follow the steps specified in Chapter 5, repeat the test with an increment of 6 degrees each time until the number of ruptures reaches the predetermined number. 7.1.3 Destruction resistance test
Follow the steps specified in Article 6.1.2, until all the samples are broken. If the water difference limit is ℃, and the test is completed, the temperature of the water condition can be reduced to ensure the water condition. E.1.4 One-time commercial temperature difference test
According to the steps specified in Chapter 5, the one-time flame decay test is carried out with a sufficiently high predetermined temperature difference, and the sensitivity is calculated. 3.2 Thermal durability test
According to the steps specified in 6.1.3, the test is carried out, and the temperature when the sample has 50% no rupture is expressed. The thermal durability information can be obtained from the curve drawn by the calculated fracture fraction of the sample and the corresponding temperature difference. Test report
7.1 The name and number of the standard used,
7.2 The number of samples and sampling method.
7.8 Water channel temperature.
7.4 Test temperature difference.
Test results.
Sample name. Specification, manufacturer, test date and tester name. 7. 8
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Tai said that the editor was also proposed by the Ministry of Industry and Information Technology of China and the State Administration of Medical and Printing. This standard is from the National Air Volume Supervision and Testing Center. This standard is from Shanghai Bacteria! . Beijing Glass General Factory, Light Sound War Tumor Training Institute Director Gong Qijing.
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