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Technical characteristics
- MaterialSteel
Description
Flanges are applied to connection of products of fittings to pipelines, connections of separate sites of pipelines among themselves and to connection of pipelines to various equipment. GOST provides 9 executions of the flanges differing in a form and the geometrical sizes of docking surfaces. Flanges of the 1st execution are most widely used. Flanges on a high pressure of Ru 10, 16, 20 MPas cannot be made with a sealing surface of execution 1. For the flanges working with high pressures with a hostile working environment, etc. other executions are, as a rule, used. Depending on a way of welding of flanges to the pipeline they happen two types:
flanges are welded flat;
flanges welded end-to-end (flanges vorotnikovy).
Material
Flanges are made from carbonaceous, alloyed and stainless steels:
St 3;
St 20;
09G2S;
15X5M;
12X18H10T.
Designation
In technical documentation and drawings each type of a flange has a certain designation, for example: flange 1-50-6 Art. 20 of GOST 12821-80, where: 1 - execution of a flange; 50 - conditional pass of "Du"; 6 - conditional pressure of "Ru"; Art. 20 - brand of steel of which the product is made.
Select the flanges corresponding to this type of fittings proceeding from its key parameters - diameter of conditional pass of "Du" and conditional pressure of "R
flanges are welded flat;
flanges welded end-to-end (flanges vorotnikovy).
Material
Flanges are made from carbonaceous, alloyed and stainless steels:
St 3;
St 20;
09G2S;
15X5M;
12X18H10T.
Designation
In technical documentation and drawings each type of a flange has a certain designation, for example: flange 1-50-6 Art. 20 of GOST 12821-80, where: 1 - execution of a flange; 50 - conditional pass of "Du"; 6 - conditional pressure of "Ru"; Art. 20 - brand of steel of which the product is made.
Select the flanges corresponding to this type of fittings proceeding from its key parameters - diameter of conditional pass of "Du" and conditional pressure of "R
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Flanges steel for connection of pipelines