---
kind: "section"
citation: "46 C.F.R. § 98.30-6"
title: "46"
number: "98.30-6"
heading: "Vessels carrying IBCs."
url: "https://uscodex.org/cfr/46/98.30-6"
---

# §98.30-6. Vessels carrying IBCs.


Intermediate Bulk Containers (IBCs) with a classification of 31A may be used on a vessel to which this part applies and must meet at a minimum the following constructional requirements:

- (a) The shell thickness must be a minimum 6.36 mm (0.25 inches) in reference steel.
- (b) There must be a self-closing relief valve set to open at no less than 5 psig.
- (c) Closures used on fill openings, in excess of 20 square inches, must be equipped with a device to prevent them from fully opening without first relieving internal pressure.
- (d) All venting requirements must be followed in accordance with [49 CFR 178.345-10](/cfr/49/178.345-10.md), Table 1.

## Notes

### Amendments

[USCG-2011-0088, 78 FR 54786, Sept. 6, 2013]

### Source

Source: CGD 73-172, 39 FR 22954, June 25, 1974, unless otherwise noted.

### Authority

Authority: 33 U.S.C. 1903; 46 U.S.C. 3306, 3307, 3703; 49 U.S.C. App. 1804; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGFR 65-50, 30 FR 17022, Dec. 30, 1965, unless otherwise noted.

### Amendments

[USCG-2011-0088, 78 FR 54786, Sept. 6, 2013]