GroundRules
46 CFR 54.01-40: -40 External pressure (modifies UG-28).
Where this section sits in the code
- Title 46—Shipping
- CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
- SUBCHAPTER F—MARINE ENGINEERING
- PART 54—PRESSURE VESSELS
- Subpart 54.01—General Requirements
(a) The exemption from external pressure consideration provided by the note under UG-28(f) does not apply.
(b) Vessels which may at times be subjected to partial vacuum due to nature of the contents, temperature, unloading operations, or other facet of employment must either have vacuum breaker protection or be designed for not less than one-half atmosphere of external pressure.
Collected 2026-08-27T02:26:22Z. Source file · JSON