Section 5 Access Hatches
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Construction & Classification of Submersibles & Diving Systems, July 2022 - Part 4 Exostructure, Stability and Corrosion Protection - Chapter 1 Exostructure - Section 5 Access Hatches

Section 5 Access Hatches

Parent topic: Chapter 1 Exostructure

5.1 General

5.1.1 Every buoyant one atmosphere submersible craft shall be provided with an access hatch which should be operable from both sides. Where practicable this hatch should be so positioned and protected that the crew may exit when the craft is on the surface. See also Rules for the Manufacture, Testing and Certification of Materials, July 2022, Ch 2, 5.2 Strain age embrittlement tests 5.2.2.

5.1.2 The access hatch may be the largest penetration of the pressure hull and special consideration should be given to its effect on the pressure hull structural analysis. The factors to consider are:
  1. The detail geometry changes caused by the penetration.
  2. The possibility of an interaction with adjacent penetration.
  3. The compatibility of materials used in the construction of the hatch.

5.1.3 Special consideration will be given to the design of hatches intended to be used under pressure for the transfer of personnel or cargo. Such hatches and seatings should be designed and stiffened to avoid distortion. Seat designs will also require special consideration and may be required to withstand pressures in both directions.

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