Historical
DIN EN 1092-2:1997
Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 2: Cast iron flanges
The document specifies requirements for circular flanges made from ductile, grey and malleable cast iron for DN 10 to DN 4000 and PN 2,5 to PN 63. It also specifies the types of flanges and their facings, dimensions and tolerances, bolt sizes, surface finish of jointing faces, marking, testing, quality assurance and materials together with associated pressure/temperature (p/T) ratings.
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Deutsches Institut für Normung [din]