Section 2 Cylindrical shells and drums subject to internal pressure
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 2 Machinery and Engineering Systems - Part 8 Pressure Plant - Chapter 2 Other Pressure Vessels - Section 2 Cylindrical shells and drums subject to internal pressure

Section 2 Cylindrical shells and drums subject to internal pressure

Parent topic: Chapter 2 Other Pressure Vessels

2.1 Minimum thickness

2.1.1 The minimum thickness, t, of a cylindrical shell is to be determined by the following formula:

where

t, p, Ri, c and σ are as defined in Vol 2, Pt 8, Ch 2, 1.2 Definition of symbols.

J = the joint factor of the longitudinal joints (expressed as a fraction). See Vol 2, Pt 8, Ch 2, 1.9 Joint factors in the case of seamless shells clear of openings J = 1,0.

2.1.2 The formula in Vol 2, Pt 8, Ch 2, 2.1 Minimum thickness 2.1.1 is applicable only where the resulting thickness does not exceed half the internal radius, i.e. where t is not greater than 0,5Ri.

2.1.3 Irrespective of the thickness determined by the formula in Vol 2, Pt 8, Ch 2, 2.1 Minimum thickness 2.1.1, t is to be not less than mm, where Di is as defined in Vol 2, Pt 8, Ch 2, 1.2 Definition of symbols. The minimum thickness permitted for vessels manufactured in corrosion resistant steels will be the subject of special consideration.

2.2 CROSS-REFERENCES

2.2.1 For efficiency of ligaments between tube holes, see Vol 2, Pt 8, Ch 1, 2.2 Efficiency of ligaments between tube holes.
For compensating effect of tube stubs, see Vol 2, Pt 8, Ch 1, 2.3 Compensating effect of tube stubs
For unreinforced openings, see Vol 2, Pt 8, Ch 1, 2.4 Unreinforced openings
For reinforced openings, see Vol 2, Pt 8, Ch 1, 2.5 Reinforced openings

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