- Flange typeFlat
One of basic elements of the pipeline are flanges which provide reliable tightness of the connected sites or shutoff valves, and, in too time, allow to perform repair work quickly.
Flanges vorotnikovy are connecting elements in the form of a disk with "collar" with the openings necessary for fixture located on them. Fastening is made by means of bolts and hairpins, hermetically connecting pipes with pipeline fittings.
Flanges are applied to connection of shutoff valves with pipelines, installation of separate sites of pipelines, and also to connection of pipelines to various (for example, boiler) to the equipment.
The advantage of flange collars is connections ensuring durability and tightness of a design is. Besides, flanges are simple in production, allow to carry out fast installation and dismantle of shutoff valves and sites of pipelines.
Flanges are divided by constructive characteristics on flat, vorotnikovy and carving. The greatest distribution was gained by flanges vorotnikovy which distinctive feature is that they are welded on a pipe end-to-end. So, the internal diameter of vorotnikovy flanges is equal to the internal diameter of a pipe.
Flanges intend for tight connection of communication pipes, and also for accession them to machines, devices and capacities, for connection of shaft, etc. the rotating details.
Flanges can differ by the sizes, a form of a sealing surface and a way of fastening. The flange is an independent detail, but more often he can be met as an element of a pipe, a shaft or a fitting.
Steel flanges of pipelines and connecting parts welded end-to-end, and also at connecting flanges of fittings, connecting parts of cars, devices, branch pipes, devices and tanks on the conditional pressure of Ru from 0,1 to 20 MPas. Flanges are made with sealing surfaces of execution 1, 2, 3, 4, 5, 6, 7, 8 and 9 with connecting sizes in accordance with GOST 12815 80. An identification number at the order of a flange of Du of 100 mm round steel welded end-to-end for Ru 1,6 MPas (16,0 atm) from steel 20 with a connecting ledge of execution 1: Flange of 1 100 16th Art. 20 of GOST 12821 80.