Section 3 Spherical shells 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 1 Steam Raising Plant and Associated Pressure Vessels - Section 3 Spherical shells subject to internal pressure

Section 3 Spherical shells subject to internal pressure

Parent topic: Chapter 1 Steam Raising Plant and Associated Pressure Vessels

3.1 Minimum thickness

3.1.1 The minimum thickness of a spherical shell is to be determined by the following formula:

where t, p, Ri, c, σ and J are as defined in Vol 2, Pt 8, Ch 1, 1.2 Definition of symbols

3.1.2 The formula in Vol 2, Pt 8, Ch 1, 3.1 Minimum thickness 3.1.1 is applicable only where the resulting thickness does not exceed half the internal radius.

3.1.3 Openings in spherical shells requiring compensation are to comply, in general, with Vol 2, Pt 8, Ch 1, 2.5 Reinforced openings, using the calculated and actual thicknesses of the spherical shell as applicable.

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