Article 31 Oil fuel installations (boilers and machinery)—vessels of 12 metres in length and over but less than 24.4 metres in length

In every vessel of 12 metres in length and over but less than 24.4 metres in length to which these Rules apply oil fuel filling points shall be so arranged that oil fuel will not readily be spilled, overflow, drain or lodge in any space.

In every such vessel pipes used to convey fuel oil shall be made of seamless steel or other suitable material and shall be properly installed. Pipes, joints and fittings shall, before being put into service for the first time, be subjected to a test by hydraulic pressure to twice their maximum working pressure, and at any time thereafter shall be capable of withstanding such a test.

In every such vessel where tubular gauge glasses are fitted to oil fuel tanks they shall be of substantial construction, adequately protected and fitted with self-closing arrangements on the tank.