Welded steel flanges flat ones are used for butt jointing of pipe sections when installing pipelines for supplying water, gas, and steam. They are also used to connect the necessary fittings to the pipes.
Flat flange 12820-80 is a steel ring with holes for mounting bolts. The dimensions and number of these holes depend on the scope of use, manufacturing features, flange sizes and are regulated by GOST 12820-80. They are produced in a wide range of sizes - with a diameter from 50mm to 800mm. The manufacturing method is selected depending on the diameter: either bending of rolled products, or stamping followed by welding (the joint is straightened hot). Flat flanges are widely used in many areas - utilities, energy, industry (chemical, gas, oil).
The material for the manufacture of flat flanges is steel of various grades - 20, 25, St3sp, 09G2S, 10G2, 12Х18Н9Т, 15Х5М. They are designed for a wide operating range of pressures up to 25 DPA and temperatures from -70 0 C to +300 0 C. Sealing surfaces in versions 1., 2., 3. But if there is a technological basis, it is allowed to manufacture rings with connecting dimensions of sealing surfaces 4. , 5., 8., 9.
The cost of the flange is determined by its thickness and the dimensions of the outer diameter of the ring. The cost is also affected by some technological manufacturing features and the grade of steel used.
The TekhArmatura company occupies a leading position in the market for the supply of pipeline and shut-off valves, thanks to which we always offer our customers the most reasonable prices for our products. Buy flanges you can in our company at the most favorable price price.
We cooperate with individuals and legal entities. We sell steel flanges in any quantity - from single to large batches. We deliver to all regions of Russia. We sell only certified products that have passed factory control.
Steel flanges, characteristics and types
Welded steel flange is the connecting part of the pipeline. We offer to buy steel flanges of various designs, sizes and purposes. The quality of such products meets Russian standards and fully meets European requirements.
Using flanges, not only individual pipeline elements are connected, but also the equipment included in such a system. Welded steel flanges are secured using: bolts, nuts, studs, washers. The most popular types of flanges are:
- flat steel welded (GOST 12820-80);
- welded steel collar (GOST 12821-80);
- loose steel on a welded ring (12822-80);
- steel flange plugs (GOST 12836-67).
Manufacturers produce steel flanges in 9 types of connecting surfaces. The most commonly ordered version is the 1st version, designed for a maximum medium pressure in the pipeline of 6.3 MPa. There are various flange joining schemes (depending on the design).
Such products comply with GOST 12820-80 and are made from the following grades of carbon and alloy steels: St3, St20, St.25, 15ХМ, 12Х18Н9Т. Steel flanges are designed for operation in a temperature range from -30 to + 300 degrees.
Buy steel flanges
The Vesta Metal company offers to buy steel flanges in Moscow. We cooperate with our clients only on mutually beneficial terms, therefore the price of steel flanges of all sizes is always lower than the market price. In addition you will receive:
- the ability to order any batch of goods;
- dealer cost;
- delivery within the Russian Federation;
- free consulting assistance;
- European service;
- convenient payment methods;
- decent discounts.
Call during business hours and order the required steel flanges in the required quantity. If you find it difficult to choose brands or order volume, consultants will help with calculations, provide information about the models of steel welded flanges presented in the catalog and calculate the cost of the order. After completing the application and payment, we will ship the products to the address you specified. Muscovites and residents of the Moscow region, if desired, can pick up the order themselves.
Steel welded flanges are used for hermetically sealed connection to shut-off and control valve pipelines, as well as for connecting pipelines to each other. In addition, steel flanges are used to connect various devices such as pumps, filters, sump tanks, water meters, etc. to the pipeline.
Steel flanges - application
Steel flanges They are a flat disk with a through hole and holes for studs or bolts. Depending on the installation features, flanges are divided into flat and collar flanges. When choosing steel flanges, there are many nuances to consider. For example, the diameter of the flange passage must correspond to the diameter of the passage of the connected pipeline elements. Also, steel flanges differ in their thickness and number of mounting holes, depending on the pressure level in the pipeline. For connecting two objects with steel flanges pipeline system Between them, special spacer circles are placed from various soft materials, which, when tightening the bolts, are pressed in and form a hermetically sealed connection. Simply put, steel flanges allow you to tightly and reliably fasten two sections of the pipeline. Flanges are not fasteners, they are a kind of support for fasteners.
Steel flanges - state standards
Steel flanges are produced in accordance with GOST, ATK and OST standards in force in our country:
GOST 12821-80: Butt welded steel flanges. This GOST is applicable to steel welded flanges for pipelines and connecting parts with a nominal pressure Py from 0.1 to 20.0 MPa (from 1 to 200 kgf/cm2), operating medium temperature from -2530C to +6000C.
GOST 12820-80: Steel flat welded flanges. GOST is applicable to steel flat welded flanges with a nominal pressure Py from 0.1 to 2.5 MPa (from 1 to 25 kgf/cm2), temperatures from -700C to +3000C.
Steel flanges - buy wholesale and retail
The SOTIS company provides the opportunity to buy welded steel flanges flat GOST 12820-80 and collar GOST 12821-80. Our catalog contains steel flanges of various diameters and modifications according to nominal pressure. Our company’s specialists will help you select and purchase the flanges needed specifically for your facility.
Find out more detailed information, prices, product availability, and you can also buy steel flanges wholesale and retail from the sales department specialists of our company.
