BS 3581:1963

For chemical and allied industries, where resistance to corrosion or cleanliness require special consideration. Dimensions, use of Acme screw thread, for butt-welded, expanded, recessed fittings. Illustrations, dimensions of preferred and non-preferred types of bends, tees, crosses. Stainless steel tubes for which fittings intended. Materials, methods of specifying fittings. Connectors, synthetic rubber joint for vacuum applications, key for tightening fittings.