BS 1640-1:1962

Dimensions and tolerances, materials, methods of manufacture, pressure/temperature ratings, marking, inspection, tests for seamless and fabricated fittings: 45° long radius elbows, 90° long and short radius elbows, 90° long radius tangent elbows, long and short radius return bends, equal and reducing tees, concentric and eccentric reducers, caps and lap-joint stub ends, of sizes in to 24 in. Welding-neck flanges not included.Cross References:BS 131:Part 2BS 1501-1506BS 1510BS 1560BS 1600BS 2600BS 2910BS 3293 BS 3351Partially replaced by BS EN 10253-2:2007.Incorporates the following:AMD 904 published 15 March 1972PD 5746 published 15 February 1966PD 6263 published 15 September 1967