BS 1640-2:1962

Co-operating organizations
Foreword
Specification
Section one: General
1 Scope
2 Size and size identification
3 Pressure ratings
4 Materials
5 Manufacture
6 Heat treatment
7 Descaling
8 Repair of defects
Section two: Dimensions and tolerances
9 Dimensions
10 Tolerances
Section three: Workmanship, marking, inspection, testing
               and certification
11 Workmanship and finish
12 Marking
13 Inspection
14 Test facilities
15 Prototype bursting tests
16 Non-destructive testing
17 Intercrystalline corrosion test
18 Hydrostatic testing
19 Certification
Tables
1 Materials and material identification symbols
2 Tolerances
3 Outside diameter and nominal wall thickness of
    wrought steel pipe
4 Dimensions of elbows and return bends
5 Dimensions of 90 deg long radius tangent elbows
6 Dimensions of equal tees
7 Dimensions of reducing tees
8 Dimensions of reducers (concentric and eccentric)
9 Dimensions of caps
10 Dimensions of lap-joint stub ends
Appendix
    Information to be supplied by the purchaser
Figures
1 Welding end for wall thicknesses from 1/8 in to 3/4
    in inclusive
2 Welding end for wall thicknesses greater than 3/4 in
3 Typical examples of off-square tolerance X checked
    against reference planes

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.