of

2. Guidance for Gas-fuelled Ships.

The following plans and documents are to be submitted to the Society for approval.

(1) Arrangement of engine room, gas pump, gas compressor room and other spaces containing gas equipment

(2) Ventilation system arrangement of engine room, gas pump, gas compressor room and other spaces containing gas equipment

(3) Drawings and specifications of gas supply piping

(4) Drawings and specifications of offsets, loops, bends and mechanical expansion joints, such as bellows, slip joints(only inside tank) or similar means in the gas piping

(5) Drawings and specifications of flanges, valves and other fittings in the gas piping system. For

valves intended for piping systems with a design temperature below - 55 °C, documentation for leak test and functional test at design temperature (type test) is required.

(6) Complete stress analysis of piping system when design temperature is below - 110 °C

(7) Documentation of type tests for expansion components in the gas piping system

(8) Specification of materials, welding, post-weld heat treatment and non-destructive testing of gas piping

(9) Specification of pressure tests (structural and tightness tests) of gas piping

(10) Program for functional tests of all piping systems including valves, fittings and associated

equipment for handling gas (liquid or vapour)

(11) Drawings and specifications of insulation for low temperature piping where such insulation is installed

306. Gas fuel bunkering

1. Gas fuel bunkering systems are to be installed in accordance with Ch 3, 105. and 109.