BS 1640-3:1968

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 19 mm to 609.5 mm. 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 905 published 15 March 1972