13.7 Fuel Oil System Components
13.7.1 Pipes and Fittings
13.7.1(a) Pipes. Pipes are to meet the general requirements of certification in 4-6-1/7.1; materials in 4-6-2/3; and design in 4-6-2/5.1, subject to the following:
i) Pipes passing through fuel oil tanks are to be of steel except that other materials may be considered where it is demonstrated that the material is suitable for the intended service.
ii) Limited use of plastic pipes will be permitted, subject to compliance with the requirements of Section 4-6-3.
iii) For pipes, the design pressure is to be taken in accordance with 4-6-4/Table 3.