Answer
A - The latest requirements of fixed CO2 systems are :-
1. The hydrostatic test date of all storage containers should be checked. High-pressure cylinders should be subjected to periodical tests at intervals not exceeding 10 years. At the 10-year inspection, at least 10% of the total number provided should be subjected to an internal inspection and hydrostatic test. If one or more cylinders fail, a total of 50% of the onboard cylinders should be tested. If further cylinders fail, all cylinders should be tested. Before the 20-year anniversary and every 10-year anniversary thereafter, all cylinders should be subjected to a hydrostatic test.
2. When the CO2 cylinders are removed for hydrostatic test, they should be replaced such that the quantity of fire-extinguishing medium continues to satisfy the requirements of FSS Code
3. At least once every five years, internal inspection of all control valves to be performed