Flanges and their joints. Circular flanges for pipes, valves, fittings and accessories, PN designated - Aluminium alloy flanges1 Scope This European Standard specifies requirements for PN designated circular flanges for pipes, valves, fittings and accessories made from aluminium alloy in the range of DN 15 to DN 600 and PN10 to PN 63 (see Table 1). This European Standard specifies the types of flanges and their facings, dimensions and tolerances, bolt sizes, surface finish of jointing faces, marking and materials together with associated pressure temperature (p T) ratings.

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4 Extraneous matter

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6 Fishing practices

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this Technical Report includes

4 Factory production control

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The preferred numbers of teeth are 7