Flanges in grey cast iron, copper alloy and cast or wrought steel for -328°F (-200°C) to 975°F (524°C) and up to 2800 lb/in^2. Materials and dimensions of flanges, bolts and nuts. Ten tables cover plain, boss, integrally cast or forged, and welding neck types.Cross References:BS 18BS 21BS 78:Part 1BS 84BS 309BS 310BS 350BS 806BS 916 BS 970BS 1083BS 1211BS 1306:Part 2 BS 1400BS 1452BS 1501-1506BS 1580:Part 1BS 1580:Part 2BS 1633BS 1723 BS 1724BS 1768BS 1769BS 2035BS 2060BS 2708BS 2789BS 2856BS 3100BS 3410BS 3601BS 3602BS 3604 ISO/R 64ISO/R 65