point at the time of each vessel's inspection for certification.

(e) Excess flow valves shall be inspected at the time of inspection for certification. The Officer in Charge, Marine Inspection, shall satisfy himself that the valve is in working condition by visual inspection, and if this is impossible, by one of the following

means:

(1) Removing the valve and bench testing ashore; the valve shall close at or below its rated closing flow.

(2) By any other means acceptable to the Officer in Charge, Marine Inspection, which will demonstrate that the valve is operable.

(f) Pressure vaccum relief valves shall be examined to determine that the operating mechanism is free and capable of activation.

(g) Safety relief valves shall be tested by bench testing or other suitable means. The valves shall relieve and reseat within the design tolerances of the set pressure, or it shall be removed and reset prior to being returned to service. This test shall be conducted at the time of the inspection for certification.

(h) Cargo hose stored on board the vessel which is used in transferring cargoes listed in Table 151.01-10(b) shall be inspected every 2 years. This inspection shall consist of a visual examination and a hydrostatic test of 12 times the maximum pressure to which the hose will be subjected in service. The date of the most recent inspection and the test pressure shall be stenciled or otherwise marked on the hose.

(i) Cargo piping shall be inspected and tested at the same time as the cargo tanks.

Subpart 151.05-Summary of Minimum Requirements for Specific Cargoes

§ 151.05-1 Explanation of column headings in Table 151.05.

(a) Cargo identification/name. This column identifies commodities by name as listed in Table 151.01-10(b).

(b) Cargo identification/pressure. This column identifies cargo in terms of pressure within the tank. Terms used are:

(1) Pressurized. Cargo carried at a pressure in excess of 10 pounds per square inch gage as measured at the top of the tank (i.e., exclusive of static head).

(2) Atmospheric pressure. Cargo carried at not more than 10 pounds per square inch gage, exclusive of static head.

(c) Cargo identification/temperature. This column identifies the cargo by the temperature of the cargo during transit.

(1) Ambient temperature. Cargo which is carried at naturally occurring temperatures.

(2) Low temperature. Cargo carried below ambient temperatures when the product temperature is below 0°F.

(3) Elevated temperature. Cargo carried above ambient temperatures.

(d) Hull type. This column refers to the flotation features of the barge. Terms used are explained and defined in Subpart 151.10 of this part.

(e) Cargo segregation/tanks. This column refers to the separation of the cargo from its surroundings. Terms are explained in § 151.13-5 and in footnotes to Table 151.05 of this part.

(f) Cargo segregation/piping and venting. This column indicates the required separation of piping and venting used for the cargo from piping and venting used for other cargo. Terms are explained in § 151.13-10 and in the footnotes of Table 151.05.

(g) Tanks/type. This column refers to the design requirements for cargo tanks and their placement within the hull of the vessel. Terms are explained in § 151.15-1. (h) This column refers to arrangements for preventing excess pressure or vacuum within the cargo tank. Terms used are explained and defined in § 151.15-5.

Tanks/venting.