SB 1379-NP15 which flange standard is the flange diameter, pitch, thickness, screw hole number and diameter?
Several systems of international standards for pipe flanges1, flange connection or flange connection, is defined by the flange, gasket and bolt three are connected as a group of combined sealing structure can be folded connecting pipe flange refers to the pipeline installation of piping flange, used in equipment refers to equipment import and export flange.
Flange, threaded connection (wire), flange and welding flange. Low pressure small diameter wire connecting flange, high pressure and low pressure big diameter all use welding flange, different pressure flange thickness and connection bolt diameter and quantity are different.According to the different grades of pressure, the flange pad also has different materials, from low pressure asbestos pad, high pressure asbestos pad to metal pad.1. to classified material of carbon steel, cast steel, alloy steel, stainless steel, copper, plastic, Aluminum Alloy, argon Ge Lek, PPC etc..2., the production method can be divided into forging flange, casting flange, welding flange, roll flange (super type)3. makes the standard can be divided into national standard (Ministry of chemical industry standard, standard oil, electricity standard), American Standard, German standard, Japanese standard, Russian standard, etc..
2, international pipe flange standards of several systems1) European flange system: German DIN (including the Soviet Union), British standard BS, standard NF, Italian standard UNIA, nominal pressure: 0.1, 0.25, 0.6, 1, 1.6, 2.5, 4, 6.4, 10,, 16, 25,, 32, 40B, probable path: 15~4000mm (maximum diameter change and selected flange specifications and different flange pressure rating surface)C structure: flat plate, flange, welding ring sleeve type, crimping sleeve type, welding crimping sleeve type, welding ring sleeve type, welded, threaded neck, and integral flange coverD, flange sealing surface: flat surface, concave surface, concave convex surface, mortise and tenon surface, rubber ring joint surface, lens surface and diaphragm welding surfaceE, the Soviet Union in the 1980 release of OCT with standard pipe flanges recorded similar to the German DIN standard, no traces2) American flange system: American ANSI B16.5, steel pipe flanges and flange fittings, ANSI B16.47A/B, big diameter steel flanges, B16.36 orifice flanges, B16.48 characters, flanges, etc..
