(a) The initial inspection which may consist of a series of inspections during the construction of an unmanned barge shall include a complete inspection of the structure, auxiliary machinery, and equipment. The inspection shall be such as to insure that the arrangement, materials, and scantlings of the hull structure, tanks and pressure vessels and their appurtenances comply with applicable regulations of this chapter and with the requirements of this part.

§ 151.04-5 Inspection for certification.

(a) An inspection for certification is a prerequisite of the reissuance of a Certificate of Inspection as provided for in applicable regulations of this chapter.

(b) Unless otherwise specified by special requirements, cargo tanks shall be internally examined according to the following:

(1) Where the cargo tank is of the gravity type and the structural framing is on the internal tank surface, the tank shall be inspected internally at the time of inspection for certification.

(2) Where the cargo tank is of the gravity type and the structural framing is on the external tank surface accessible for examination from voids, cofferdams, double bottoms, and other similar spaces, tanks shall be inspected internally at 4-year intervals.

(3) Where the cargo tank is of the pressure-vessel type, it shall be examined internally at 8-year intervals.

(4) Internal inspection may be required at more frequent intervals as deemed necessary by the Officer in Charge, Marine Inspection.

(c) Cargo tanks shall be visually inspected externally at the time of the vessel's inspection for certification. In the case of single skin construction, underwater portions of the tanks need not be examined unless deemed necessary by the Officer in Charge, Marine Inspection.

(1) For tanks where external examination of the tank proper is not possible due to insulation, the Officer in Charge, Marine Inspection, may require a suffi

cient portion of the insulation to be removed to determine the soundness of the tank. As an alternative to removing the insulation for external examination, the Officer in Charge, Marine Inspection, may accept, upon request, an internal examination.

(2) In addition to visual inspection, the Officer in Charge, Marine Inspection, may require the tank to be tested by such nondestructive means as he considers necessary to determine the condition of the tank.

(d) Quick closing valves shall be tested by operating the emergency shutoff system from each operating 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 11⁄2 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.

This

(a) Cargo identification/name. 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.

and

(f) Cargo segregation/piping 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) Tanks/venting. 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.

(1) Tanks/gaging devices. This column refers to arrangements provided for determining the amount of cargo present

in cargo tanks. Terms used are ex plained and defined in § 151.15-10.

(j) Cargo transfer/piping. This column refers to the classification of piping in accordance with Subchapter F of this chapter as discussed in § 151.20-1.

(k) Cargo transfer/control. This column refers to the valving requirements for the cargo piping system. These requirements are defined in § 151.20-5.

(1) Environmental control/cargo tanks. This column refers to control of the composition of the environment within cargo tanks. Definitions and detailed ín requirements are given § 151.25-1. (m) Environmental control/cargo handling space. This column refers to control of the environment in the cargo handling spaces. Definitions and detailed requirements are found in § 151.25–2.

(n) Fire protection. This column specifies whether portable fire extinguishers are required on barges carrying the cargo named. Requirements for cargoes requiring extinguishers are given in Subpart 151.30 of this part.

(0) Special requirements. This column refers to requirements which apply to specific cargoes and which cannot be stated in generalized terms. Where applicable, detailed requirements are given in Subparts 151.50 and 151.55 of this part.

(p) Electrical installations/hazard group and class. This column refers to the hazardous material group and class ratings of § 111.60-40, of this chapter. These group and class ratings are to be used in the selection of electrical equipment for use within the hazardous areas as permitted by Subpart 111.70 of this chapter. All the cargoes listed in Table 151.05 are classified and group ratings are, and will continue to be, indicated when available.

(q) Temperature control installations. This column refers to systems which are used to control the temperature of the cargo. Definitions and requirements which are applicable if such systems are used are given in Subpart 151.40 of this part.

(r) Tank inspection period. This column refers to the maximum period in years between internal cargo tank inspections. Applicable requirements are given in § 151.04-5.

[CGFR 70-10, 35 F.R. 3714, Feb. 25, 1970; 35 F.R. 6431, Apr. 22, 1970]