---
kind: "section"
citation: "46 C.F.R. § 154.195"
title: "46"
number: "154.195"
heading: "Aluminum cargo tank: Steel enclosure."
url: "https://uscodex.org/cfr/46/154.195"
---

# §154.195. Aluminum cargo tank: Steel enclosure.

- (a) An aluminum cargo tank and its dome must be enclosed by the vessel's hull structure or a separate steel cover.
- (b) The steel cover for the aluminum cargo tank must meet the steel structural standards of the American Bureau of Shipping published in “Rules for Building and Classing Steel Vessels”, 1981.
- (c) The steel cover for the aluminum tank dome must be:
  - (1) At least 3.2 mm ( 1/8 in.) thick;
  - (2) Separated from the tank dome, except at the support points; and
  - (3) **Thermally isolated from the dome.**

## Notes

### Amendments

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 31630, Aug. 21, 1987]

### 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 77-069, 52 FR 31630, Aug. 21, 1987]