7.1.1 Manned pressure chambers are to be designed to be suitable for an
operating range of minus 18˚C to +66˚C unless otherwise specified. However the
compression chambers installed under environmentally controlled condition where the
lowest possible temperature which the PVHOs or the system may be exposed to during
installation and operation irrespective of pressure is not below minus 10˚C, the
minimum design temperature of minus 10˚C can be accepted. Other pressure chambers
such as SDC/Diving Bell/Rescue Chambers/Hyperbaric Life Boats are to be designed for
a minimum design temperature of minus 18˚C unless otherwise justified that the
equipment will never be exposed to temperature below minus 10˚C.
7.1.3 The design temperature for other pressure vessels associated with diving
systems, submersibles and underwater installations is to be based on appropriate
environmental and operating conditions and in compliance with the adopted
code/standard.