Section 2 Periodical Surveys

201. Annal Survey

1. For ships with natural gas fuelled engine installations, the survey is to include:

(1) External examination and function testing of remote operated valves in the gas piping system

(2) External examination of gas pipe ducts

(3) Testing of instrumentation

(4) Testing of emergency shutdown system, as a minimum by:

(A) Releasing gas detectors and fire detectors

(B) Checking electrical disconnection in ESD protected engine rooms

(C) Checking safety functions in connection with the ventilation systems in gas engine rooms

(D) Verification of the functioning of ventilation systems

(E) Examination of drip trays in bunker station.

(5) Manual with instructions for operation and/or maintenance is to be verified.

(6) List of required signboards or notice plates is to be verified.

202.

1.

Intermediate Survey

For ships with natural gas fuelled engine installations, in addition to the requirement in the survey is to include testing of all alarm and shutdown functions for:

(1) Gas compressor

(2) Gas engine

201. 1,

203.

Special Survey

1. For ships with natural gas fuelled engine installations, in addition to the requirement in 202. 1, the survey is to include :

(1) Examination of gastight bulkheads with cable and shaft sealing etc. Special attention is to be paid to bulkheads in the electrical motor and or compressor room. Shaft sealing is to be checked for lubrication and possible overheating.

(2) Testing of gas tanks high level alarm

(3) Examination and testing of:

(A) Gas tanks safety relief valves

(B) Tank room or second barrier space P/V valves and relief hatches, as relevant

(C) Gas handling machinery and equipment

(D) Auxiliary systems and equipment for gas installations

(D) Portable gas detectors and oxygen analyser.