BS 2598-3:1980

National foreword
Cooperating organizations
Specification
0. Introduction
1. Scope and field of application
2. References
3. Definitions
4. Material and working conditions
5. Basic dimensions
6. Mating requirements
7. Essential dimensions for interchangeability
8. Marking
9. Testing, handling and use
Annexes
A. Measurement of length and angles
B. Measurement of bow
C. Examples of the use of adaptor flanges for buttress
     ends of different shapes
Tables
1. Maximum working pressures for glass pipeline and
     fittings
2. Limits of wall thickness
3. Dimensions for compatibility of spherical and flat
     buttress ends
4. Adaptor flanges, mating and dimensions
5. Minimum possible deviation of alignment
6. Lengths and tolerances of pipe sections
7. Permissible bow of pipe sections
8. Maximum outside diameter of pipe
9. Lengths and tolerances of spacers and adaptors
10. Lengths and tolerances of elbows
12. Lengths and tolerances of 45 deg bends
13. Lengths and tolerances of 90 deg bends
14. Lengths and tolerances of equal tees
15. Lengths and tolerances of crosses
16. Lengths and tolerances of angle valves
Figures
1. Designation of the components in a flange coupling
     assembly
2. Length of pipe section with spherical buttress ends
     with reference to diameter dO
3. Length of pipe section with flat buttress ends and
     annular zone required for mating flat buttress ends
     with reference to diameters d' and d"
4. Pipe section with spherical buttress ends (male/
     female)
5. Pipe section with flat buttress ends
6. Spacer, spherical (female)/spherical (male)
7. Spacer, flat/flat
8. Adaptor, spherical (male)/flat
9. Adaptor, spherical (female)/flat
10. Reducer, spherical (female)/spherical (male)
11. Reducer, flat/spherical (male)
12. Reducer, flat/spherical (female)
13. Reducer, flat/flat
14. Elbow with spherical buttress ends, male/female
15. Elbow with flat buttress ends
16. 45 deg bend with spherical buttress ends,
     male/female
17. 45 deg bend with flat buttress ends
18. 90 deg bend with spherical buttress ends,
     male/female
19. 90 deg bend with flat buttress ends
20. Schematic drawing of interchangeability
21. Equal tee with spherical buttress ends, male/female,
     side branch female
22. Equal tee with spherical buttress ends, male/female,
     side branch male
23. Equal tee with flat buttress ends, side branch flat
24. Cross with spherical buttress ends, male/female
25. Cross with flat buttress ends
26. Angle valve with spherical buttress ends, male/
     female
27. Angle valve with spherical buttress ends, female/
     male
28. Angle valve with flat buttress ends
29. Straight-through valve with spherical buttress ends,
     male/female
30. Straight-through valve with spherical buttress ends,
     female/male
31. Straight-through valve, flat/flat
32. Recommended apparatus for measurement of length of
     pipe sections and fittings
33. Example for a method of test for accuracy of
     90 deg bend with flat buttress ends
34. Example for a method of test for accuracy of 45 deg
     bend with flat buttress ends
35. Method of measurement of bow
36. Glass pipe to glass pipe
37. Glass pipe to pipe of any kind of material

Requirements for compatibility and interchangeability of fittings which include spacers, adaptors, reducers, bends, tees and valves; also adaptor flanges for use with buttress ends of different designs.