This MSC.1/Circ.1318 fixed CO2 maintenance guide aligns day-to-day shipboard routines with MSC.1/Circ.1318 fixed CO2 maintenance requirements under SOLAS II-2/14. The goal is simple: be class/flag-ready with records that survive scrutiny. Use the PDF below to plan work windows, lock permits, and attach evidence to PMS tasks.

Scope. The circular frames what must be verified on fixed CO₂ installations in machinery spaces, cargo pump-rooms and other protected areas. Expect: monthly checks (readiness of cylinders/valves/indication, alarms panel), annual inspections (boundaries, bottle stations, manifolds, release cabinets, time-delay/alarms functional checks), biennial actions where applicable, and 5/10-year tasks including cylinder hydrotests per policy/flag, 10-year renewal of flexible hoses, internal valve inspections, and discharge piping blow-through including pilot/manifold line tests.

Evidence. Classes and PSC typically expect maker service reports, calibrated gauge logs, alarm/time-delay test sheets, updated cylinder lists with hydro dates, photographs of measured states, and PMS tickets closed with references. Keep witness statements or class endorsements where load/functional tests were observed.

Execution. Map each interval to your PMS, then stage materials and access: workshop time, permits, gas-freeing where needed, and witnessing slots. Tie the report forms to job cards so evidence is generated during work, not after. Coordinate with foam/sprinkler detection routines to reduce duplicated isolations and re-commissioning.