§154.459. General.
46 C.F.R. § 154.459
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.
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.
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).
If Table 3 allows the hull to be a secondary barrier, the vessel's hull must:
Meet §§ 154.605 through 154.630; and
Be designed for the stresses resulting from the design temperature.
Notes, amendments, and revision history
Amendments
[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]
Authority
Authority: 46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1.
Source
Source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted.
Amendments
[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]