Flange insulation jacket standard and purchase common problems
Flange insulation jackets are widely used in the insulation protection of power equipment because of their very good insulation properties, which play a very important role for equipment and workers. Today, I will introduce you to the standard of flange insulation jackets and the common problems of purchasing. I hope to help you.
Standard content of flanged insulation jacket
Flange insulation jacket pressure test standard
Distribution room voltage 10KV selected 8mm thick, power frequency withstand voltage test 10000V 1 minute without breakdown, 18000V in power frequency withstand voltage test, 20 seconds breakdown. Distribution room voltage 35KV 10-12mm thick, power frequency withstand voltage test 15000V 1 minute without breakdown, in the power frequency withstand voltage test 26000V, 20 seconds breakdown. Distribution room low voltage, select 5mm thick 500V below the power frequency withstand voltage test 3500V 1 minute without breakdown, in the power frequency withstand voltage test 10000V, 20 Second breakdown.
Flange insulation jacket thickness measurement standard
More than 5 different points should be randomly selected on the entire flange insulation jacket for thickness measurement and inspection. Measurements can be made using a thousand heart liver or an instrument of the same precision. The accuracy of the micrometer should be within 0.02mm, the diameter of the drill should be 6mm, the diameter of the flat presser foot should be (3.17±0.25) mm, and the presser foot should be able to apply a pressure of (0.83±0.03)N. The flange insulation jacket should be placed flat. So that the micrometer measurement is smooth between.
Flange insulation jacket storage standard
Power Industry Standard DL / T 853 - 2004 Appendix F (Guidelines for the Use of Storage, Maintenance, Inspection and Testing of Insulating Mats) F.5: Insulation mats should be routinely tested every 6 months for insulating mats. If the insulation mat exceeds the validity period of the test, it must be tested again before it can be used.
Working environment standard for flange insulation jacket
Good physical and mechanical properties, excellent insulation performance, can work in dry environment with high air interposability coefficient of -35~+100°C.
Standard for laying flanged insulation jackets
The Labor Safety Supervision Bureau stipulates (equal to the national standard): Flange insulation jackets with equal width and greater than 1 m and thickness not less than 5 mm, equipment emergency lights, insulating gloves and high-voltage insulating rods shall be arranged in front of the switchboards in the power distribution room. Objects are not allowed to be placed; all holes and windows should be sealed with small square iron mesh, and the door should be set with a 60cm high baffle.
Flange insulation jacket to buy common problems
1, the detection problem of the flange insulation jacket
The general inspection agency will tell the enterprise staff that the flange insulation jacket should be laid first. Secondly, the flange insulation jacket must have the test report and the certificate. Finally, it is necessary to get the designated organization to test, and the test can be used only after the test is reached. Many companies have rushed to buy a cheap flange insulation jacket, sent to the inspection products are not up to standard, can not be used, the other party will not be returned, it is really difficult inside and outside. Finally, I have to re-purchase, it can be said that the loss is serious
2, the odor problem of the flange insulation jacket
The raw materials of the flange insulation jacket are made of virgin rubber and synthetic rubber. Generally, synthetic rubber is made of waste rubber and reclaimed rubber. It contains a lot of toxic substances, which will continue to emit pungent odor and power distribution. The room "people do not live". The flanged insulation jacket was indeed bought back, but everyone in the power distribution room wanted to enter. Colleagues have big disagreements, and leaders have great opinions. In the end, they are not replacing them. They are looking for ways to remove odors on the Internet. However, the essence of the problem is the use of materials.Anything is futile.
3, the life of the flange insulation jacket
Many low-cost flange insulation jackets have scratches, air bubbles and poor elasticity on the surface. It can be said that the quality is worrying. Although with a test report, the one-time test can also reach the standard. However, it was not long before the use of breakage, breakage, and the detection of pressure resistance could not reach the standard, and had to be re-purchased. Although the initial purchase is relatively low cost, the overall cost performance is relatively poor.
The above is about the standard of flange insulation jacket and the introduction of common problems. I hope everyone can understand the standard of flange insulation jacket and the common problems of purchasing.
