Insulating flanged compound IFS-50 is an element for protecting the pipeline system of oil and gas transportation systems from the destructive effects of electrochemical corrosion. The use of IFS-50 is relevant for medium and large diameter pipes - especially when laying them above ground. This solution allows us to solve the problem of pipe metal destruction and eliminate colossal losses of the transported medium with minimal investment.
Design of insulating flange connection IFS-50
Structurally, this element is a tight, hermetically sealed connection of collar flanges with a flow section diameter of 50 mm, between which there is a dielectric bushing. As a rule, it is made of fluoroplastic, vinyl plastic or PON-B paronite. To ensure that the dielectric bushing does not lose its original properties and prevents the flow of current discharges (stray currents, currents caused by electrochemical corrosion of the pipeline material and other reasons) through the pipeline, it is coated with a layer of BT-99 bakelite varnish. It also has dielectric properties and does not allow the structure of the sleeve to change under the influence of moisture.
The connection of two or three pipeline flanges is made using special pins made of fluoroplastic or polyethylene. Also in design IFS Du50 There are threaded sockets for screws for fastening electrical equipment, which allows you to measure the current resistance between each of the flanges.
Each unit of insulating flange connection supplied to our customers with DN 50 subjected to hydraulic and electrical testing. Thus, its compliance with the declared characteristics and requirements of the “Rules for the Construction and Safe Operation of Process Pipelines” is fully confirmed.
If you are interested in reliable protection of communications and pipelines:
- In close proximity to objects that are sources of stray currents;
- When connecting pipe sections made of different alloys;
- Pipe sections located near explosive underground objects;
- On the border between territories with different owners;
- In vertical sections of input and output of gas distribution stations and hydraulic fracturing units with ground execution,
The company "PKF "Spetskomplektpribor" recommends ordering insulating connection IFS-50 from our company. We carry out wholesale and retail supplies of gas and other equipment from the catalog throughout the Russian Federation on the most favorable terms. Leave a request in any way convenient for you (standard form with a shopping cart, call managers, email), and we will cover your needs for this or that equipment in the shortest possible time.
The connections are designed to operate in the range from residual pressure (vacuum) of 0.001 MPa to excess pressure of the environment not higher than 25.0 MPa, the minimum temperature of the working environment is not lower than – 60 ºС and the maximum temperature of the working environment is not higher than + 260 ºС.
The scope of application of IFS is pipelines in the chemical, petrochemical, petroleum, oil refining, gas and other related industries, transporting gaseous, vaporous and liquid media.
In terms of resistance to environmental climatic factors, devices must comply with UHL versions, placement category 1 according to GOST 15150.
Connections must be designed for installation in geographic areas with seismicity up to 8 points inclusive on the 12-point scale adopted in the Russian Federation in accordance with SNiP II-7.
The connections must relate to specific purpose products (IKN), type 1, refurbishable, in accordance with GOST 27.003.
Design and manufacture of IFS
An insulating flange connection consists of two or three flanges, between which insulating seals are embedded. The flanges are connected to each other using studs and bolts. The studs are separated from the flanges by PTFE bushings or, alternatively, by heat-shrinkable tubes made of the same material. Nuts and washers are insulated from the flanges with fiberglass in accordance with GOST 12652-74. To enable connection of electrical measuring instruments to the system, the connections have screw connections. You can even connect a spark charger through it.
IFS design with two flanges
- 1 - flange;
- 2 - insulating gasket (PTFE);
- 3 - pipe;
- 4 - nut;
- 5 - hairpin;
- 6 - metal washer;
- 7 - insulating washer (fiberglass);
- 8 – insulating sleeve (PTFE). IFS design with intermediate flange
- 1, 2 - flanges;
- 3 - pipe,
- 4 – insulating gaskets (PTFE);
- 5 - hairpin;
- 6 - nut;
- 7 - metal washer,
- 8 - insulating washer (fiberglass);
- 9 - insulating sleeve (PTFE).
The IFS corresponds to the UHL climatic design for placement category 1 according to GOST 15150.
IFS must comply with the requirements of GOST 25660, GOST 12.2.003, GOST 12.2.049, the requirements of these technical specifications and a set of design documentation approved in the prescribed manner, as well as the requirements of regulatory and technical documentation of Rostechnadzor.
Isolating flange connections can perform their functions from any position. Their parameters for connection comply with the requirements established by GOST 12815, 12820 and 12821. The connections maintain parallelism with the sealing surface, deviating from it by only 0.2 millimeters for every 100 millimeters of length. The design of the IFS makes it possible to avoid accidental loosening of the fastening of both assembly units and assemblies. You will not find any sharp edges or burrs on the parts. There may only be small dents, sludge deposits or other minor imperfections on surfaces that have not yet been treated. However, no work media is allowed to pass through the connection points. All pressures used, both test and working, comply with the requirements of GOST 356.
Flange connections can withstand vibrations of 2 mm/s generated by external sources near the installation site. They are not afraid of parts and exposure to the external environment.
If the drawings do not indicate even more stringent requirements, then the maximum dimensional deviations should be calculated using the following formulas:
For mechanical surfaces machinable: holes H14, shafts H14 ( sign)
For non-machined surfaces, as well as at the joints between treated and untreated, is calculated based on the table below.
The mass of the flange connection has minimal error. From the figure indicated in the drawings for dimensions, the final value differs by 10% up or down. Threaded connections are made in accordance with GOST 24705, GOST 9150, GOST 16093. As for the thread accuracy class, according to GOST 16093 it will not be lower than coarse. The other thread will be exceptionally full and clean. Here you will not find burrs, cut ridges or unpleasant dents. The flanges are manufactured in compliance with the requirements of GOST 12820, GOST 12821, GOST 12815.
The insulating flange connections are assembled so well that the ends of the bolts and studs extend outward by just one thread pitch, or even less. The flanges also have holes for bolts and studs. They are located symmetrically on both flanges. On parts that require machining, all burrs are removed in advance, and sharp edges with a radius of 0.2-0.4 mm are blunted, unless otherwise indicated.
IFS insulating flange connection of two flanges, "economy" series (without down conductors, without painting)
| Diameter | |||
|---|---|---|---|
| 10 atm | 16 atm | 25 atm | |
| IFS-20 | 800 | 1100 | 1400 |
| IFS-25 | 850 | 1200 | 1550 |
| IFS-32 | 1000 | 1400 | 1800 |
| IFS-40 | 1100 | 1500 | 1900 |
| IFS-50 | 1200 | 1700 | 2000 |
| IFS-65 | 1300 | 1800 | 2300 |
| IFS-80 | 1600 | 2200 | 2800 |
| IFS-100 | 2200 | 2600 | 3000 |
| IFS-150 | 3800 | 3900 | 4500 |
| IFS-200 | 5900 | 6100 | 6500 |
| IFS-250 | 8500 | 8800 | 9400 |
| IFS-300 | 10300 | 10500 | 11200 |
| IFS-350 | 15000 | 17200 | 20000 |
| IFS-400 | 22000 | 22100 | on request |
| IFS-500 | 29000 | 39500 | on request |
| IFS-600 | 41000 | 54800 | on request |
| IFS-700 | on request | on request | on request |
IFS insulating flange connection of three flanges, “standard” series (without current conductors, without painting)
| Diameter | Pressure / Cost (RUB including VAT) price from February 1, 2016 | ||
|---|---|---|---|
| 10 atm | 16 atm | 25 atm | |
| IFS-20 | 1320 | 1320 | 1380 |
| IFS-25 | 1320 | 1320 | 1380 |
| IFS-32 | 1380 | 1380 | 1500 |
| IFS-40 | 1680 | 1680 | 1740 |
| IFS-50 | 2040 | 2040 | 2100 |
| IFS-65 | 2160 | 2160 | 2200 |
| IFS-80 | 2700 | 2700 | 2820 |
| IFS-100 | 3360 | 3360 | 3720 |
| IFS-150 | 5280 | 5280 | 5640 |
| IFS-200 | 7500 | 7500 | 8100 |
| IFS-250 | 9600 | 10200 | 10680 |
| IFS-300 | 13200 | 13440 | 13920 |
| IFS-350 | on request | 20780 | on request |
| IFS-400 | on request | 33000 | on request |
| IFS-500 | on request | 55800 | on request |
| IFS-600 | on request | 67200 | on request |
| IFS-700 | on request | 85800 | on request |
IFS insulating flange connection of three flanges, “premium” series (with current conductors, with painting)
| Diameter | Pressure / Cost (RUB including VAT) price from October 20, 2015 | ||
|---|---|---|---|
| 10 atm | 16 atm | 25 atm | |
| IFS-20, IFS-25 | 1600 | 1600 | 1700 |
| IFS-32 | 1650 | 1650 | 1800 |
| IFS-40 | 2100 | 2100 | 2250 |
| IFS-50 | 2500 | 2500 | 2600 |
| IFS-65 | 2600 | 2600 | 2750 |
| IFS-80 | 3250 | 3250 | 3450 |
| IFS-100 | 4100 | 4100 | 4500 |
| IFS-150 | 6400 | 6400 | 6800 |
| IFS-200 | 9000 | 9000 | 9800 |
| IFS-250 | 11550 | 12300 | 12900 |
| IFS-300 | 16000 | 16500 | 16900 |
| IFS-350 | on request | 25000 | on request |
| IFS-400 | on request | 40000 | on request |
| IFS-500 | on request | 67000 | on request |
| IFS-600 | on request | 67500 | on request |
| IFS-700 | on request | 103000 | on request |
Insulating flanged compound (IFS) is an integral component of pipelines of oil and gas transportation systems, petroleum products and other flammable substances that have a high flammability and explosion hazard.
Installation of IFS, which are not subject to the corrosion process upon contact with transported liquids and gases, provides surface pipelines with a multiple reduction in the likelihood of current discharges (stray currents, currents caused by electrochemical corrosion of the pipeline material and other reasons) and their protection from electrochemical corrosion.
Application flange connections IFS relevant in the following cases:
- On all kinds of branches of gas and oil pipelines from the main highway;
- When laying a pipeline in close proximity to objects that are a potential source of stray currents;
- To disconnect a pipeline from any non-insulated grounded structure or underground structure;
- When to do it flange pipe connection made from various alloys;
- At gas distribution stations and points.
Design of IFS flange connections
The design of IFS flange connections is a tight sealed joint of two or three collar flanges with a protective sleeve made of a material with dielectric properties installed between them. Vinyl plastic, fluoroplastic or PON-B paronite are usually chosen as such. To ensure that the electrical insulating properties remain unchanged under the influence of environmental factors (moisture and temperature), the bushing of the IFS detachable connection is coated with a layer of bakelite varnish. This coating has dielectric properties and at the same time prevents the absorption of moisture by the bushing material.
The connection of two pipeline flanges and the sleeve between them is carried out using polyethylene or fluoroplastic tie rods. In addition, the design insulating flange connection (IFS) provides threaded sockets for screws, with the help of which special equipment is attached to the flanges, allowing measurements of electrical resistance between structural elements.
Insulating flange connections: prices and types
The insulating materials presented in our company's price list flanged pipeline connections They have different designs and are designed for different operating conditions.
You can choose from us flange connections for gas pipelines based on the following criteria that directly determine the price of the product:
- dimensions of flange connections (pipeline diameters) – from 25 to 700 mm;
- the operating pressure in the pipeline (from 10 to 25 atmospheres);
- number of flanges (two or three);
- the presence of a current conductor (with or without it);
- climatic version according to GOST 15150-69.
If you need insulating connections (IFS), buy they are offered to you with a guarantee at the best price by PKF Spetskomplektpribor LLC. The entire list of products we supply (including insulating flange connections for steel structures) is certified, their high quality is confirmed by state certificates and permits from the Physics and Technology Academy.
We produce insulating flange connections such as: IFS-32, IFS-25, IFS-40, IFS-65, IFS-50, IFS 100, IFS-150, IFS-80, IFS 200, IFS 300, IFS 250, IFS 350 , IFS 400, IFS 500, IFS 600, IFS 700. Upon request, we produce flange insulating connections from steel 09G2S and steel 12Х18Н10Т. If you want to make the best choice of this and other gas equipment, we strongly recommend that you take advantage of the consultations and qualified assistance of our specialists through the online consultation form.
INSULATING FLANGE CONNECTIONS
The RECOM pipeline parts plant produces insulating flange connections according to TU 3799-005-31049454-2009. IFS produced by the RECOM plant are guaranteed to provide electrical insulation of one section of the pipeline from another in order to counteract electrochemical corrosion.
PURPOSE OF INSULATING FLANGE CONNECTIONS (IFS)
They are used to ensure the protective electrical potential of electrochemical protection installations (cathode electrochemical protection) of gas distribution stations (points) of gas distribution stations (GRS). They provide interruption of the flow of electric current through pipelines (electrical conductivity), also to protect various underground communications from electrocorrosion. It is placed outdoors on pipelines at the input and output of gas distribution stations (GRS) buildings, residential buildings in various climatic zones.
The design of the IFS consists of two flanges, an insulating gasket between them, insulating bushings that are installed in the mounting holes, as well as studs, nuts, and insulating washers.
TECHNICAL CHARACTERISTICS OF IFS
| Maximum permissible pressure (no more, MPa) | 10,0 |
| Conditional diameter, DN |
20...1200 |
|
Working environment |
Fresh and superheated water, saturated and superheated steam, air, inert gases, natural gas and LPG, heavy and light petroleum products, oils |
| Working environment temperature, no more than °C | +350°С |
| Material execution |
Steel 20, 09G2S, 12Х18Н10Т, VT 0.1 |
| Climatic version according to GOST 15150-69 | У1 (-40°С...+40°С) HL1 (-60°С...+40°С) |
| Water absorption of insulating materials | no more than 0.01% |
| Dielectricity of the insulating gasket in a dry state, Ohm |
0,2*106 |
| Dielectricity of the insulating gasket in a wet state, Ohm |
10*103 |
CLASSIFICATION OF IFS PRODUCED BY ZDT REKOM LLC
| Options |
IFS classification |
||
| IFS type | Type 1-1 | Type 2-3 | Type 7-7 |
| Nominal pressure, MPa | up to 2.5 | up to 6.3 | up to 10.0 |
| Operating temperature, °C | no more than 300°С | ||
| Climatic performance | U/HL |
||
| Insulation resistance, KOhm |
200 |
||
| Flange design according to GOST 12815-80 | 1-1 | 2-3 | 7-7 |
1. Flanges according to GOST 12821 (version 1-1);
2. Insulating gasket;
3. Insulating bushings;
4. Insulating washer;
7. Nuts for flange connections GOST 9064;
2. IFS 2-3 up to 6.3 MPa (63 kgf/cm2)
1. Flanges according to GOST 12821 (version 2-3);
2. Insulating gasket;
3. Insulating bushings;
4. Insulating washer;
5. Washers for flange connections GOST 9065;
6. Studs for flange connections GOST 9066;
3. IFS 7-7 up to Ru 10.0 MPa
1. Flanges according to GOST 12821 (version 7-7);
2. Insulating gasket;
3. Insulating bushings;
4. Insulating washer;
5. Washers for flange connections GOST 9065;
6. Studs for flange connections GOST 9066;
7. Nuts for flange connections GOST 9064.
In order to correctly place an order for the production of IFS at ZDT RECOM LLC, you must indicate in the application:
1. Product name – IFS;
2. Conditional diameter Dу, mm.;
3. Conditional pressure Ru, MPa (kgf/cm 2);
4. Brand of material – art. 20, Art. 09G2S, st. 12Х18Н10Т, st. 15Х5М, VT 1-0, etc.
Additionally:
1. Operating temperature, ºС;
2. Work environment.
IFS 50-63 2-3 Art. 20
IFS 50-16 1-1 Art. 20
IFS 50-160 7-7 Art. 20
If you are interested in purchasing IFS, you can fill out the terms of reference and send it to ZDT RECOM LLC.
Consequences of electrochemical corrosion on pipelines
Providing electrochemical protection is provided for by official documents:
VSN-009-88 – Departmental construction standards “Construction of main and field pipelines. Electrochemical protection means and installations."
GOST R 51164-98 – Main steel pipelines. General requirements for corrosion protection, etc.
In order to provide electrochemical protection, insulating connections are used on pipelines.
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