Flange in use with certain working principle, in accordance with the production process and technology for the production and use of, flange in use has certain principles of the work, the working  principle of the flange is the use of the flange insulation gasket and high strength insulation sleeve electrical insulating properties and flange on both sides of the elecrical insulation of work. Flange is according to the principle of work, in practical use according to the actual engineering, we on the flange insulation performance according to the method of related requirements of the flange design technology regulations " SY/T0516 -- 1997 and the buried steel pipeline cathodic protection parameters  testing party method " ( SYJ23 - 86 ) for testing, in accordance with the relevant principles and methods. The test results show that: insulation gasket and a fastening bolt of the insulation sleeve gasket in the insulation resistance between the surface of the work value can meet the requirements of the standards. Flange in use has good use value and function, can play an important role and value in different industries and fields, in which to show a good role and value.

      Large flange in use need according to certain conditions and environment, for a different use of the environment, in use in accordance with the characteristics and advantages of flange, can play an important role and value in use and construction.