§ 56.50-75 - Diesel fuel systems.

§ 56.50-75 Diesel fuel systems.

(a) Vessels greater than 100 gross tons.

(1) The diesel fuel system shall must comply with §§ 56.50-60, 56.50-85, and 56.50-90. The fuel supply piping to engines shall must be of seamless steel, annealed seamless copper or brass pipe or tubing, or of nickel copper or copper nickel alloy meeting the requirements of subpart 56.60 for materials and § 56.50-70(a)(2) for thickness. Fuel oil service or unit pumps shall be equipped with controls to pumps must comply with § 58.01-25 of this subchapter.

(2) The installation shall must comply with § 56.50-70(b).

(3) Tubing connections and fittings shall must be drawn or forged metal of the flared type except that flareless fittings of the nonbite type may be used when the tubing system is steel, nickel-copper, or copper-nickel. When making flared tube connections the tubing shall must be cut square and flared by suitable tools. Tube ends shall must be annealed before flaring.

(b) Vessels of 100 gross tons and less and tank barges —

(1) Materials. Fuel supply piping shall must be of copper, nickel copper or , copper nickel, seamless steel, or other materials having a minimum wall thickness of 0.035 inch except that piping of other materials such as seamless steel pipe or tubing which provides equivalent safety may be used.

(2) Tubing connections and fittings. Tubing connections shall must comply with the provisions of § 56.50-75paragraph (a)(3) of this section.

(3) Installation. The installation of diesel fuel piping shall must comply with the requirements of § 56.50-70(b).

(4) Shutoff valves. Shutoff valves shall must be installed in the fuel supply lines, one as close to each tank as practicable, and one as close to each fuel pump as practicable. Valves shall must be accessible at all times.

(5) Outlets and drains. Valves for removing water or impurities from fuel oil systems will be permitted in the machinery space provided such valves are fitted with caps or plugs to prevent leakage.

(6) Filling pipe. Tank filling pipes on motorboats and motor vessels of less than 100 gross tons and tank barges shall must terminate on an open deck and shall must be fitted with suitable shutoff valves, deck plugs, or caps.

(7) Vent pipes. Each tank shall must be fitted with a vent pipe complying with § 56.50-85.

(8) Independent diesel fuel tanks. See subpart 58.50 of this subchapter for specific requirements.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 40610, Oct. 2, 1989]