Code of Federal Regulations Title 46. Shipping § 46.154.1335 Pressure and vacuum protection

(1) A pressure gauge that:

(2) If vacuum protection is required under § 154.804, a vacuum gauge meeting paragraphs (a)(1)(i), (a)(1)(ii), and (a)(1)(iii) of this section.

(1) Actuates before the pressure in any cargo tank exceeds the maximum pressure specially approved by the Commandant (CG–OES);  and

(2) Actuates an audible and visual alarm at the cargo control station, and a remote group alarm in the wheelhouse.

(1) Actuates before the pressure in any cargo tank falls below the minimum pressure specially approved by the Commandant (CG–522);  and

(2) Actuates an audible and visual alarm at the cargo control station, and a remote group alarm in the wheelhouse.

(1) Enclosed hold;

(2) Enclosed interbarrier space;

(3) Cargo pump discharge line;

(4) Liquid cargo manifold;  and

(5) Vapor cargo manifold.