FIELD: machine building.
SUBSTANCE: invention is related to pipeline valves. Electrical insulating flange joint comprises dielectric gasket fixed between end flanges of pipelines by means of bolt pairs with electrical insulating elements installed on them. Electrical insulating elements are formed by means of multi-layer winding of porous polytetrafluoroethylene tape on bolts, which are located in openings of flange joint flanges. Winding of porous polytetrafluoroethylene tape on bolts of flange joint is realised with tension and with an overlap diagonally by cross method, at that thickness of porous polytetrafluoroethylene tape in bolts winding is not more than 0.25 mm, and porosity makes around 50-60%. Dielectric gasket is arranged in the form of flat annular disc and protrudes above flanges of flange joint.
EFFECT: increased reliability of joint.
15 cl, 10 dwg
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|
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| SEALING GLAND | 2012 |
|
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