Flanges and their joints. Circular flanges for pipes, valves, fittings and accessories, PN designated - Cast iron flanges Ingestion-build-224916 BS 25999-1:2006 is the first

BS 25999-1:2006 is the first of the two-part BS 25999

The quality of uppers

Definition added for parallel geometry stay hinge (with or without a friction system)

The pull-out test is intended to determine the adhesion of steel reinforcement to autoclaved aerated concrete (AAC)

A second furnace thermocouple has been introduced in Subclauses 4

Flanges and their joints. Circular flanges for pipes, valves, fittings and accessories, PN designated - Cast iron flanges Ingestion-build-224916 BS 25999-1:2006 is the first1 Scope This standard 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. (See 4. 1 and 4. 2). This standard 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.