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Code of Federal Regulations Title 46. Shipping § 46.154.459 General

Current as of October 02, 2022 | Updated by FindLaw Staff

(a) Each cargo tank must have a secondary barrier that meets Table 3 and except as allowed in Table 3, the hull must not be the secondary barrier.

(b) If the Commandant (CG–ENG) specially approves an integral tank for a design temperature at atmospheric pressure lower than –10°C (14°F), the integral tank must have a complete secondary barrier that meets § 154.460.

(c) If the Commandant (CG–ENG) specially approves a semi-membrane tank under the requirements of an independent tank type B, the semi-membrane tank may have a partial secondary barrier specially approved by the Commandant (CG–ENG).

(d) If Table 3 allows the hull to be a secondary barrier, the vessel's hull must:

(1) Meet §§ 154.605 through 154.630;  and

(2) Be designed for the stresses resulting from the design temperature.

TABLE 3—SECONDARY BARRIERS FOR TANKS

Tank type

Cargo temperature (T) at atmospheric pressure

T≥-10°C (14°F)

T<-10°C (14°F)≥55°C (-67°F)

T<-55°C (-67°F)

Integral

No secondary barrier required

Tank type not usually allowed1

Tank type not allowed.

Membrane

․․․do

Complete secondary barrier1

Complete secondary barrier.

Semi-membrane

․․․do

․․․do

Do.

Independent:

Type A

․․․do

․․․do

Do.

Type B

․․․do

Partial secondary barrier1

Partial secondary barrier.

Type C

․․․do

No secondary barrier required

No secondary barrier required.

1 The hull may be a secondary barrier.

(14 U.S.C. 632; 46 U.S.C. 369, 375, and 416; 49 U.S.C. 1655(b); 49 CFR 1.46(b))

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Cite this article: FindLaw.com - Code of Federal Regulations Title 46. Shipping § 46.154.459 General - last updated October 02, 2022 | https://codes.findlaw.com/cfr/title-46-shipping/cfr-sect-46-154-459/

Read this complete Code of Federal Regulations Title 46. Shipping § 46.154.459 General on Westlaw

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