Historical
BS 1640-1:1962
Specification for steel butt-welding pipe fittings for the petroleum industry. Wrought carbon and ferritic alloy steel fittings (British Standard)
Dimensions and tolerances, materials, methods of manufacture, pressure/temperature ratings, marking, inspection, tests for seamless and fabricated fittings: 45$0D long radius elbows, 90$0D long and short radius elbows, 90$0D 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.
CONTENT PROVIDER
British Standards Institution [bsi]
British Standards Institution [bsi]