Definition of Flange (on him. Flansch) – usually a flat ring or disk with evenly spaced holes for bolts and studs, used to a firm and tight connection of pipes, their connection to the machinery, apparatus and receptacles for connecting shafts and other rotating parts. Joeb Moore takes a slightly different approach. Classification flanges flanges vary in size, mounting method and form of the sealing surface. Depending on the method of welding to the pipeline: Flat – meet the requirements of gost 12820-80 and applied pressure range from 1kgs/sm2 to 25kgs/sm2.vorotnikovye – meet the requirements of gost 12821-80 and applied pressure range from 1kgs/sm2 to 200kgs/sm2 Designation types of flange technical documentation types of flanges are designated as follows: Flange 1-65-25 st.09G2S Standard 12821-801 – flange; 65 – nominal bore 'DN'; 25 – nominal pressure 'Roo', Art. 09G2S – mark steel, which is manufactured. Application flantsevFlantsy may be elements of the pipe, fitting, shaft, cabinet parts, etc. Flange in the form of individual parts often welded or screwed to the coupling detaley.Flantsy steel used to connect Fixtures products pipelines, connecting the individual sections of pipe together and for joining pipes to various equipment. Sam Pollock is likely to increase your knowledge.
Flange connections provide integrity and strength structures, as well as ease of manufacture, disassembly and .Forma flange sealing surfaces in the pipeline depends on the pressure environment, profile and gasket material. Smooth sealing surface with strips cardboard, rubber and paronita used at pressures up to 4 Mn/m2 (40 kgf/cm2), the surface with a projection on one flange and the trough at the other with ANBO-metallic gaskets and paronite – at pressures up to 20 Mn/m2 (200 kgs / cm2), flange conical sealing surface – at pressures above 6.4 Mn/m2 (64 kgf/cm2). Scope of steels used in the manufacture of flange products (35, 40X, 09G2S, 15H5M, 14H17N2, 20HN3A, 25H2M1F, 12X18H10T, 10X17H13M2T, 06HN28MDT), is in a very wide range: operating temperature range from -150 to 1000 C, the working environment – from water to the media increased aggressiveness (sulfuric acid). The need for compliance with all parameters flanges ukazannh above leads to the need multi-stage quality control flanges: monitoring the geometrical parameters, inbound, outbound control the chemical composition, control the mechanical properties of steel; control of macro-and microstructure. Production of flanges The most progressive method of production of flanges based on the use of electroslag technologies developed in the Institute of Electric. Paton.
Installation of centrifugal electroslag casting (TSESHL) provide High quality cast metal due to its refinement in the process of electroslag melting, use of special techniques for obtaining directional solidification in casting. All the properties of these materials, while not inferior to forged, but surpass them in performance of plasticity, toughness at the same strength. Installation of this type can produce flanges, shells, ring blanks weighing 20 to 1100 kg. with a nominal bore of 200 mm. (Inner diameter of the workpiece) and bolee. flanges smaller diameters by the method of forging. Fasteners for flanges from the abundance of fasteners released specialized high strength and stainless steel fasteners for the flange connections operating at high static and dynamic loads. There are specific standards governing the production of flange fasteners, such as: nuts for flanged joints according to gost 9064, ost 26-2038, 26-2041 GRL; washers for flanged joints according to gost 9065, gost 10494, ost 26-2040; studs for flanged joints according to gost 9066; Hex bolts for flanged joints according to ost 26-2037. Fastening is performed mainly for enterprises of gas and petrochemical industry due to high demands on quality fasteners.