PART A-1 - SPECIFIC
REQUIREMENTS FOR SHIPS USING NATURAL GAS AS FUEL
6 – FUEL CONTAINMENT SYSTEM
6.7 Regulation for pressure relief system
1 Regulation 6.7.1.1 is replaced by the following:
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"All fuel storage tanks shall be provided with a pressure relief
system appropriate to the design of the fuel containment system and the fuel
being carried. Fuel storage hold spaces, interbarrier spaces and tank
connection spaces, which may be subject to pressures beyond their design
capabilities, shall also be provided with a suitable pressure relief system.
Pressure control systems specified in 6.9 shall be independent of the
pressure relief systems."
11 – FIRE SAFETY
2 The following new regulation 11.8 is added after existing regulation
11.7:
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"11.8 Regulation for fuel preparation room fire-extinguishing
systems
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For ships constructed on or after 1 January 2024, fuel
preparation rooms containing pumps, compressors or other potential ignition
sources shall be provided with a fixed fire-extinguishing system complying
with the provisions of SOLAS regulation II-2/10.4.1.1 and taking into
account the necessary concentrations/application rate required for
extinguishing gas fires."
PART B-1
16 – MANUFACTURE, WORKMANSHIP AND TESTING
16.3 Welding of metallic materials and non-destructive testing for the fuel
containment system
3 Regulation 16.3.3.5.1 is replaced by the following:
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".1 tensile tests: cross-weld tensile strength is not to be less
than the specified minimum tensile strength for the appropriate parent
materials. For materials such as aluminium alloys, reference shall be made
to 6.4.12.1.1.3 with regard to the regulations for weld metal strength of
under-matched welds (where the weld metal has a lower tensile strength than
the parent metal). In every case, the position of fracture shall be recorded
for information;"