Chapter 5 - Cargo Containment
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Chapter 5 - Cargo Containment

 To ensure the safe containment of cargo under all design and operating conditions having regard to the nature of the cargo carried.

5.1 Definitions

5.1.1 Independent tank means a cargo-containment envelope, which is not contiguous with, or part of, the hull structure. An independent tank is built and installed so as to eliminate whenever possible (or in any event to minimize) its stressing as a result of stressing or motion of the adjacent hull structure. An independent tank is not essential to the structural completeness of the vessel's hull.

5.1.2 Integral tank means a cargo-containment envelope which forms part of the vessel's hull and which may be stressed in the same manner and by the same loads which stress the contiguous hull structure and which is normally essential to the structural completeness of the vessel's hull.

5.1.3 Gravity tank means a tank having a design pressure not greater than 0.07 MPa gauge at the top of the tank. A gravity tank may be independent or integral. A gravity tank should be constructed and tested according to recognized standards, taking account of the temperature of carriage and relative density of the cargo.

5.1.4 Pressure tank means a tank having a design pressure greater than 0.07 MPa gauge. A pressure tank should be an independent tank and should be of a configuration permitting the application of pressure-vessel design criteria according to recognized standards.

5.2 Tank type requirements for individual products

5.2.1 Requirements for both installation and design of tank types for individual products are shown in column f in the table in chapter 17 of the IBC Code.

5.2.2 Instead of the use of permanently attached cargo deck tanks complying with the requirements of the IBC Code, portable tanks meeting the construction requirements of the IMDG Code or other portable tanks specifically approved by the Administration may be used for cargoes indicated in 1.1.9, provided that the provisions of chapter 17 are complied with. The applicable tank instruction for the products listed as dangerous goods in the IMDG Code should apply. Products with pollution hazard only and a flashpoint above 60C falling within the scope of the present Code, but for which the IMDG Code is not applicable, when carried in packaged form, should be shipped under the tank instruction and special tank requirements as included in the IMDG Code for goods with UN number 3082.


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