Flanges isolating Du of 100 mm of Ru16 of GOST 12820-80

Connection of pipes through the isolating flanges of Du of 100 mm of Ru16 of GOST 12820-80 is one of elements of pipeline system and is intended for protection against impact of electrochemical corrosion. The majority of pipelines lay underground therefore the problem of their protection against electrochemical influence is particularly acute for those who operate these systems. Electrochemical corrosion of pipelines is a consequence of influence of electric currents of the earth, or as they are called still, the wandering currents. Electric currents get into pipes which have defects of isolation. Getting into the pipeline, electric current forms a cathodic zone on the place of penetration which on the place of an exit of current forms a dangerous anode zone which leads to destruction of metal as a result of influence of current. Consequences of such influence can be: metal destruction, formation of cracks that in turn leads to leak of gas, water, oil, etc. Such changes in system can lead to emergencies. For prevention of harmful effects of electric currents of the earth on underwater and underground (land) pipelines use the isolating flange connection (IFC) which electroinsulating properties are reached by means of the isolating laying and plugs. The isolating flange connection represents the design consisting of branch pipes, flanges, the isolating rings (laying) between them, the isolating plugs which are installed in fixing openings, and also hairpins, nuts, washers.

LLC S.T.A firm. offers the kupitkovanny isolating flanges of Du of 100 mm of Ru16 conforming to technical requirements 12820-80:

• Conditional pressure, PN (Ru): to 16 MPas
• Temperature: to + ^2500C
• Working environment: water, steam, gas, nonaggressive environments
• Material: steel