Regulation 62 - Inert gas systems
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Regulation 62 - Inert gas systems

Parent topic: Part D - Fire Safety Measures for Tankers

62 Reference to MSC/Circ.387, MSC/Circ.450/Rev.1 and MSC/Circ.485

 Reference is made to MSC/Circ.450/Rev.1 - Revised factors to be taken into consideration when designing cargo tank venting and gas-freeing arrangements, MSC/Circ.485 - Clarification of inert gas system requirements under SOLAS 1974, as amended, and MSC/Circ.387 - Revised guidelines for inert gas systems.

62.1 Meaning of "cargo tanks"

 Throughout this regulation the term "cargo tanks" includes also slop tanks.

62.9.2 Meaning of "gas-safe space"

 A gas-safe space is a space in which the entry of hydrocarbon gases would produce hazards with regard to flammability or toxicity.

62.11.5 Arrangements for connection of inert gas main to external supply of inert gas

 The arrangements should consist of a 250 mm nominal pipe size bolted flange, isolated from the inert gas main by a valve and located forward of the non-return valve referred to in regulation II-2/62.10.8. The design of the flange should conform to the appropriate class in the standards adopted for the design of other external connections in the ship's cargo piping system.

62.13.4.1 Arrangements for isolation of inert gas supply mains and cargo piping systems

 As a guide, the effective isolation required by this regulation may be achieved by the two arrangements shown in figures 1 and 2 of regulation 62.13.4.1 in the appendix.

62.20 Reference to original SOLAS text

 The text as adopted by the International Conference on Safety of Life at Sea, 1974.

62.21 Reference to MSC/Circ.353

 Reference is made to MSC/Circ.353 - Guidelines for inert gas systems.

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