FIELD: pipeline joints. SUBSTANCE: flange pair is extended from both sides by means of branch pipes. Internal part of flange pair contains dielectric tube which creates sealing and dielectric joint along internal surface of pipeline. Dielectric tube is pressed tightly at its ends to internal surface of flanges with welded branch pipes with the aid of two metal endpieces. Length of dielectric tube exceeds pipeline diameter. Steel studs with nuts are insulated electrically from steel flanges by means of dielectric inserts. Flanges are separated from each other along external surface by dielectric gasket. The invention makes it possible to enhance cathodic protection against external corrosion and to create flange joint sealing at high pressure. EFFECT: enhanced efficiency, extended service life. 1 dwg
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