Article 12. Periodical tests, controls and inspections
At least once every twelve months the carbon dioxide fire extinguishing installation shall be subjected to the inspections as required in the manual mentioned in Article 1; The checking of the contents of the cylinders as mentioned under 12.1.7 for ships not being passengerships, may be carried out once every 24 months. The annual inspection, as far as the relevant parts are present, shall consist of at least the following:
12.1.1 External survey of the entire installation;
12.1.2 The entire piping system to be blown through with air of at least 6 bar;
12.1.3 The alarm system to be tested for good working order;
12.1.4 Checking of the contents of the pilot cylinders of the control units for the correct mass or pressure, as indicated on these bottles, where a mass reduction of not more than 5 percent, or a pressure reduction of not more than 10 percent may be allowed;
12.1.5 Checking the control and tightness of section valves of the installation, if necessary by means of the auxiliary source as mentioned in Article 4.12;
12.1.6 Checking the proper operation of the (pneumatic) arrangement for opening the cylinder valves as described in the manual;
12.1.7 Checking of the contents of every carbon dioxide cylinder including the cylinders as mentioned in Article 7 and 8; a decrease in weight of not more than 5 percent may be allowed. Of these checks, a certified report must be kept on board;
12.1.8 By an end-inspection, checking the operational readiness of the installation.
12.2 The annual inspections, and the findings, shall be noted in the ships log.
12.3 At least once every five years the carbon dioxide fire extinguishing installation shall be subjected to the following inspections, taking into account the directions given by the supplier and as far as the relevant parts are present:
12.4.1 Inspections as mentioned in 12.1;
12.4.2 Checking the tightness of the piping of the pilot cylinders to the opening arrangements of the cylinder valves, or other pilot piping, at a pressure of at least 25 bar;
12.4.3 Testing the setting of the springloaded safety valves at 120 bar;
12.4.4 Testing the tightness of the high-pressure section up to and including the section valve by means of air or asphyxiating gas at a pressure of not less than 25 bar;
18.104.22.168 Checking of the medium pressure and low-pressure section as well as the discharge in the cargo spaces by intensively blowing through with air or asphyxiating gas at an initial pressure of not less than 25 bar; the locations mentioned under Article 4.3 shall be made visible;
22.214.171.124 Checking the proper discharge from the nozzles in the engineroom, the boilerroom, the pumproom and any other relevant spaces by means of air or asphyxiating gas at an initial pressure of not less than 25 bar. The necessary safety precautions shall be observed when asphyxiating gas is used for this purpose. If the installation consists of not more than 20 cylinders (900 kg) this check should preferably not be carried out with asphyxiating gas;
12.4.6 Checking of the smoke detecting system by means of a smoke test if the carbon dioxide piping system in the cargo spaces is equipped for smoke detection;
12.4.7 Checking of the slow-leak valve for proper operation;
12.4.8 Checking the complete installation for operational readiness.
12.4.9 For tests and checks mentioned in 12.4.4, 126.96.36.199 and 188.8.131.52 asphyxiating gas from cylinders due for periodical survey as mentioned in 12.5 may be used.
12.5 At intervals of not more than 5 years at least 5 percent of the total number of cylinders in a carbon dioxide fire extinguishing installation shall be surveyed internally and externally and be pressure tested, taking care that the cylinders tested are not the same as those which were tested during previous periodical inspections. The date of testing and the surveyors stamp shall be punched in the surface of the cylinder. An authenticated test report with findings shall be forwarded to the Head of the Inspection Department. If the tests mentioned provide ground for this, a pressure test of all the cylinders of the battery may be requested by the Head of the Inspection Department.
12.6 Carbon dioxide cylinders showing a pennanent increase of capacity after a pressure test shall be condemned.
12.7 Prior to refilling the cylinders, the following shall be complied with:
- a visual inspection of the syphon tube by the official or representative supervising the survey as mentioned in 12.5.
- The renewal of the frangible disc;
- The tightness and, if applicable, the proper action of the valve shall be checked.
12.8 A statement shall be issued by the filling station showing that the cylinders have been filled with the required quantity of carbon dioxide.
12.9 Cylinders showing external signs of corrosion or pitting upon inspection may be designated to pass an intennediate survey as indicated in 12.4 to 12.8.
12.10 The periodical inspections indicated in 12.4 to 12.9 shall be carried out in the presence of a surveyor of the Netherlands Shipping Inspectorate. With the consent of the Head of the Inspection Department, these tests may be carried out by a representative of one of the Classification Societies mentioned in Article 3 of the Netherlants Shipping Order 1965, or when they take place abroad, under supervision of an official of the Administration of that country.
12.11 The results of the above mentioned tests shall be entered in a test report according to the model designated by the Head of the Shipping Inspectorate as represented in Annex A or B, depending on the kind of test, made out and signed by the person in whose presence the tests were carried out.
12.12 The testreport shall be submitted to the Head of the Inspection Department.
12.13 The required five-yearly inspection and the conclusions shall be noted in the ships' log.