Section 5 Hose Completion Tests
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 5 Main and Auxiliary Machinery, Systems and Equipment - Chapter 5 Diving Umbilicals - Section 5 Hose Completion Tests

Section 5 Hose Completion Tests

Parent topic: Chapter 5 Diving Umbilicals

5.1 Length

5.1.1 The minimum length of the hose is to be equal to the maximum diving depth together with the handling system requirements plus 5 per cent. Such hoses may be of a single length for use in the umbilical or, if required, with the minimum number of approved couplings for applications other than umbilical.

5.2 Dimension, ball and hydrostatic tests

5.2.1 The dimensions of the hose and inside and outside diameters are to be in accordance with Table 5.6.1 Ball Test.

5.2.2 A test ball of diameter given in Table 5.6.1 Ball Test is then to be passed through the full length of the hose.

5.2.3 Each hose, with end fittings and any couplings is to pass an internal hydrostatic proof test of twice the design pressure for at least 1 minute without showing any signs of failure.

5.3 Bonding separation test

5.3.1 Where gas hoses, designed for isobaric use, are also intended for hyperbaric use, the hoses are to be subjected to a permeation test as follows:
  1. The full length of each hose complete with end fittings, is to be pressurized with helium for a period of 36 hours to the design pressure at its intended operating temperature.
  2. At the end of this period and before the pressure is released, the external surfaces of the hose should be examined over their full length for any defects.
  3. The hose is then to be decompressed within 15 minutes and proof of non-collapse is to be demonstrated by the ball test referred to in Pt 5, Ch 5, 5.2 Dimension, ball and hydrostatic tests.
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