This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of silicone fiberglass self-extinguishing pipes. This standard applies to self-extinguishing pipes made of alkali-free glass fiber braided pipes that are treated at high temperature and coated with silicone copolymer resin. JB/T 7093-1993 Silicone resin glass fiber self-extinguishing pipe JB/T7093-1993 standard download decompression password: www.bzxz.net

Additional instructions:
JB/T7092-93
Appendix A
Special measuring fixture for flattening method
1 Right guide column: 2-Left guide column; 3-Left die base; 4-Right die base:
5-Fixing screw
6-Right pressure block;
7-Left pressure block:
This standard is proposed and managed by the Guilin Electric Science Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Guilin Electric Science Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Zhang Changsheng and Xie Zhongguang. 8-Pressure device.
Subject content and scope of application
Mechanical Industry Standard of the People's Republic of China
Silicone resin glass fiber self-extinguishing tube
JB/T7093-93
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of silicone resin glass fiber self-extinguishing tube (hereinafter referred to as self-extinguishing tube). This standard applies to self-extinguishing tubes made of alkali-free glass fiber braided tubes coated with silicone copolymer resin after high temperature treatment. 2 Reference standards
GB7113
GB7114
General requirements for electrical insulation paint tubes
Test methods for electrical insulation paint tubes
GB11026.1 Guidelines for determining the heat resistance of electrical insulation materials 3 Product classification
General procedures for formulating aging test methods and evaluating test results Products are classified according to breakdown voltage levels. Product models and characteristics are shown in Table 1. Table 1
2753-2
2753-3
4 Technical requirements
High breakdown voltage
Medium breakdown voltage
Low breakdown voltage
White, a small amount of light oil yarn is allowed, and the end is flat. Others should comply with the provisions of Chapter 3 of GB7113. 4.2 Dimensions
4.2.1 Length
The length is 1000mm, and other lengths are agreed upon by the supply and demand parties. 4.2.2 The inner diameter, wall thickness and deviation should comply with the provisions of Table 2. Table 2
1.0,1.5;2.0;2.53.0;3.5#
4.0+5.0+6.07.08.0;9.010.0
4.3 Performance requirements
The performance requirements of self-extinguishing pipes shall comply with the provisions of Table 3. Approved by the Ministry of Machinery Industry on 19931008
Implemented on 1994-01-01
Long-term heat resistance
Indicator name
Breakdown voltage (at room temperature)wwW.bzxz.Net
Heat resistance
Self-extinguishing
Temperature index ≥180.
5 Test method
5.1 Sample processing conditions and test environment conditions JB/T7093-93
Perform according to the provisions of Chapter 1 and Chapter 2 of GB7114. 5.2 Appearance
Evaluate by visual inspection.
5.3 Length
Measure with a ruler or steel tape with a scale of 1mm. 5.4 Inner diameter
According to the provisions of Chapter 3 of GB7114.
5.5 Wall thickness
According to the provisions of Chapter 4 of GB7114.
5.6 Breakdown voltage
2753-1
2753-2
2753-3
After 250℃ and 24h, the paint film is qualified after the test
According to the provisions of Articles 13.3, 13.6, 13.7.1 and 13.8 of GB7114, and the voltage rise rate is 500V/s. 5.7 Heat resistance
Take 3 self-extinguishing tubes of 200mm in length as samples, place the samples in a constant temperature box at 250±5℃ for 24h, take them out and cool them to room temperature, then use a rod ten times the diameter of the tube to bend the self-extinguishing tube into a U shape along the rod, and observe that the paint film has no droplets, no cracks, no flow marks, and no discoloration, which is qualified. 5.8 Self-extinguishing
According to Chapter 15 B method of GB7114.
5.9 Long-term heat resistance
According to GB11026.1, the end point index is agreed by the supply and demand parties, and the inspection rules
6.1 The products produced continuously for 24h on one equipment with the same raw materials and processes are considered a batch. Each batch of products must be inspected before delivery. The items for delivery inspection are Articles 4.1 and 4.2 of this standard and Items 1 and 3 in Table 3. 6.2 Type inspection items are those in Articles 4.1, 4.2 and 4.3 of this standard, which shall be conducted at least once every three months. When the raw materials or processes are changed, type inspection shall also be conducted. Article 4.4 is a final inspection item. 6.3 Other items shall comply with the provisions of Chapter 4 of GB7113. 7 Marking, packaging, transportation and storage
7.1 The storage period is 6 months.
7.2 Other items shall comply with the provisions of Chapters 5 and 6 of GB7113. 11
Additional instructions;
JB/T7093-93
This standard is proposed by the National Technical Committee for Standardization of Insulating Materials. This standard is under the jurisdiction of the Gua Lin Electric Appliance Science Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Electric Fiberglass Factory. The main drafters of this standard are Wang Yunyu and Sheng Yongqi.
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