Proposal to amend gasket requirements in the FSS Code for IMO consideration

The International Maritime Organization has issued document SSE 11/17/3, highlighting a proposal to amend paragraph 2.1.2.5 of Chapter 5 of the Fire Safety Systems (FSS) Code. This initiative aims to resolve inconsistencies in how gasket construction requirements are applied across different IMO instruments. The proposal, put forward by India, the United Kingdom, and the International Association of Classification Societies (IACS), seeks to clarify and align the requirements for gaskets used in fixed fire-extinguishing systems within protected spaces.

Currently, the FSS Code mandates that all components of discharge piping, fittings, and nozzles, including gaskets, must be constructed from materials with a melting point exceeding 925°C. However, other IMO regulations, such as Chapter 6 of the FSS Code, the IGC Code, and IMO circulars like MSC.1/Circ.1315/Rev.1 and MSC.1/Circ.1430/Rev.3, specifically exclude gaskets from this high melting point requirement. This inconsistency has caused confusion and operational challenges for ship operators and system designers. Recognizing this issue, IACS initially issued a unified interpretation (SC 263) exempting gaskets from the melting point requirement but later withdrew it after SSE 1 determined that an amendment to the FSS Code would be a more appropriate and formal solution.

The proposal stems from the understanding that gaskets in fire-extinguishing systems