15.5.3 Where plastic pipes are used in bilge systems in machinery spaces, a single
failure in any section of the pipe is not to render the whole system inoperable.
15.5.4 For
other services where there are Rule requirements, plastic pipes are
to be in accordance with an acceptable National or International Standard
and suitable for the intended service conditions.
15.5.5 Plastic
pipes are not to be used in machinery spaces and other spaces of high
fire risk or on the open deck for conveying fuel oil, lubricating
oil or other flammable liquids or for air and sounding pipes to tanks
containing such liquids.
15.5.6 Plastic
pipes used on the open deck for air and sounding pipes to other tanks
are to be located in a sheltered position, protected from mechanical
damage.
15.5.7 Plastic
pipes used for overboard scuppers, sanitary discharges and seawater
systems are to be provided with an approved ship-side valve. When
the ship-side valve is arranged such that in any operating condition
of the craft it is near or below the waterline, it is to be capable
of being closed from a safe position above the bulkhead deck.