PD 6550-1:1989

Foreword
Committees responsible
1. Introduction
2. The stress distribution in a head
3. BS 5500, figure 3.5.2.3 discussed
3.1 A non-iterative design procedure
3.2 The parameters
4. Design methods
4.1 The two methods
4.2 For heads where e/D >/= 0.01
4.3 For heads where e/D < 0.01
5. References
Table
1. Comparison of design factors in BS 1500 and BS 1515
Figures
1. Axisymmetric edge movements and horizontal shears
     acting at junctions
2. Elastic stresses in a torispherical head
3. Deformation due to pressure on constituent shells
4. Design curves in BS 5500: figure 3.5.2.3 (with
     additions)
5. Design curves in BS 1515 (with notation amended)
6. Application of the Formdehngrenze method
7. Plastic collapse mechanism for pressurized
     torisphere
8. Comparison of the values given by The Shield and
     Drucker formula against their calculated values

Discusses the requirements in clause 3.5.2 of BS 5500 for the design of ellipsoidal and torispherical domed ends. The method of calculating the thickness of the end is the result of theoretical and experimental work carried out over more than half a century in different parts of the world and it is accurate, reliable and simple to apply.