Insulating flange connection (dielectric)

Изолирующее фланцевое соединения ИФС и СЗК

Insulating flange connection

The insulating flange connection is necessary to eliminate stray currents in pipelines, so it is an integral part of pipeline systems.

Insulating flanged connections for gas pipeline

Flanged insulating joints are designed for various operating conditions and can be used in temperate climates or in low temperature conditions (cold-resistant version). The working medium can be steam, water, gas, petroleum products, as well as highly polluted and moderately polluted aggressive media.

Technical information

The insulating flange connections are made of steel and consist of two flanges welded to the ends of the gas pipeline. A special third flange with a thickness of 16-20 mm is supplied as a set. To ensure the electrical insulation of the flanges from each other, gaskets made of paronite or other dielectric are provided, a coating made of bakelite varnish that protects against moisture saturation. Such gaskets can also be made of vinyl plastic (or fluoropolymer). The tightening pins are enclosed in split fluoroplast bushings.

Body parts

Carbon steels:
Steel 1.0402, С22/Ск22 DIN; EN (EU), 1020 AISI, G10200 UNS (US), Ст. 20 ГОСТ 1050-88
The use temperature of the medium is from -40 to +425 C, the ambient temperature is from -40 to +40 C.

Cold-resistant steels:
Steel 40Mn4 DIN, G10350 (1035) UNS (US), Ст. 09Г2С (RU) — (body parts, pipes, junctions, spigots)
The use temperature of the medium is from -60 to +425 C, the ambient temperature is from -50 to +50 C.

Stainless steels:
Steel X12CrNiTi 18-9 DIN; EN (EU), 321 S31 ANSI, B.S. (US), Сталь 09Г2С (RU) — (body parts, pipes, junctions, spigots).
Температура использования от -196 до +600 С, окружающего среды от -50 до +50 С.

Working Parts

Carbon steels:
Steel 1.0402, С22/Ск22 DIN; EN (EU), 1020 AISI, G10200 UNS (US), Ст. 20 (RU).
Steel 1.3401 (X120Mn12) DIN, J91171 UNS (US), Ст. 20Х13 (RU).

Cold-resistant steels:
Steel 40Mn4 DIN, G10350 (1035) UNS (US), Ст. 09Г2С (RU)
Steel 1.3401 (X120Mn12) DIN, J91171 UNS (US), Ст. 20Х13 (RU).

Stainless steels:
Steel X12CrNiTi 18-9 DIN; EN (EU), 321 S31 ANSI, B.S. (US), Сталь 09Г2С (RU)
High ductility, heat resistance, high resistance to aggressive and oxidizing environments.

Sealing

To ensure electrical insulation of the flanges from each other, gaskets made of paronite PMB (4 mm) are provided, a coating made of bakelite varnish protects against moisture saturation. Such gaskets can also be made of vinyl plastic (or fluoropolymer). The tightening pins are enclosed in split fluoroplast bushings.

Welding and surfacing

Surfacing with electrodes or welding wire ESAB, OK Weartrode 55, Т-590Н, Castolin-Eutectic, LINCOLN ELECTRIC, ESAB, ASKAYNAK (EU, US), СВ-04х19н19, ЦН-12м ; ЦН-6л ; УОНИ 13/нж (RU).

Rebar flanges

The main applicable flange standards are ASME, ANSI, EN, DIN. All metal products are regulated by special documents, which contain all the basic information about the elements: dimensions, shape, types, types of connecting surface, pressure classes, materials and manufacturing methods.

Mounting elements

Fasteners (stud, nut, washer) are used according to DIN EN ISO standards, depending on the load, climatic and temperature conditions of the pipeline valves.

Paint Job

Special types of primers and paints are used for anti-corrosion protection and long-term protection of metal in temperate and cold climates.

Warranty period

Service life, not less than (years) — 30.
Full service life (cycles) — 3000.
Time to failure of cycles, not less than — 1000.
Warranty operating time of cycles — 10000.

Discounts of up to 20% for all customers until the end of 2021!

To the attention of consumers

Production and delivery according to TU 3742-001-96231033-2006 in acc. GOST R 53671. Climatic versions and categories according to GOST 15150. Transportation and storage according to GOST 15150-69. Marking of fittings according to GOST 4666.