Division .1 Where class ‘A’ divisions are penetrated for the passage of electric cables, pipes, trunks, ducts etc., or for girders, beams or other structural members, arrangements shall be made to ensure that the fire resistance is not impaired in so far as is reasonable and practicable.F1

For ships which are constructed on or after 1 January 2003 , where ‘ A ’ class divisions are penetrated, such penetrations shall be tested in accordance with the Fire Test Procedures Code, to ensure that the fire resistance of the divisions is not impaired.

In the case of ventilation ducts Regulations II-2/B/9.2.2b and II-2/B/9.3 apply.

However, where a pipe penetration is made of steel or equivalent material having a thickness of 3 mm or greater and a length of not less than 900 mm (preferably 450 mm on each side of the division) and no openings, testing is not required.

Such penetrations shall be suitably insulated by extension of the insulation at the same level of the division.