BS 1965-1:1963

Co-operating organizations
Foreword
Specification
1 Scope
2 Sizes
3 Materials
4 Methods of manufacture
5 Pressure ratings
6 Heat treatment
7 Dimensions of fittings
8 Tolerances
9 Preparation of fittings for welding
10 Tests
11 Workmanship and finish
12 Marking
13 Inspection
14 Certification
Tables
1 Outside diameter and thickness at ends of fittings
2 Tolerances on outside diameter of fitting
3 Tolerances on bore of fitting
4 Tolerances on dimensions of fittings
5 'Off-square' tolerances
6 Dimensions of elbows
6A Dimensions of short radius elbows
7 Dimensions of return bends
8 Dimensions of reducers (concentric and eccentric)
9 Dimensions of equal tees
10 Dimensions of caps
11 ISO corresponding values: outside diameters
12 ISO corresponding values: dimensions and tolerances
13 Metric conversions
Figures
1 'Off-square' tolerance
2 Weld preparation
3 90 degree elbow
4 45 degree elbow
5 Return bend
6 Reducer: concentric
7 Reducer: eccentric
8 Equal tee
9 Cap
Appendices
A Bursting tests on prototype fittings
B ISO corresponding values and metric conversions

Specifies leading dimensions, tolerances and materials for 90° and 45° elbows, 180° return bends, equal tees, concentric and eccentric reducers and caps, in carbon steel, for butt-welding on to pipes. Details of testing and marking are also given.