Code of Federal Regulations (Last Updated: July 5, 2024) |
Title 46 - Shipping |
Chapter I - Coast Guard, Department of Homeland Security |
SubChapter O - Certain Bulk Dangerous Cargoes |
Part 154 - Safety Standards for Self-Propelled Vessels Carrying Bulk Liquefied Gases |
Subpart D - Special Design and Operating Requirements |
§ 154.1710 - Exclusion of air from cargo tank vapor spaces.
Latest version.
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§ 154.1710 Exclusion of air from cargo tank vapor spaces.
When a vessel is carrying acetaldehyde, butadiene, ethylene oxide, or vinyl chloride, the master shall ensure that air is:
(a) Purged from the cargo tanks and associated piping before the cargo is loaded; and
(b) Excluded after the cargo is loaded by maintaining a positive pressure of at least 13.8 kPa gauge (2 psig) by:
(1) Introducing a gas that:
(i) Is not reactive;
(ii) Is not flammable; and
(iii) Does not contain more than 0.2% oxygen by volume; or
(2) Controlling the cargo temperature.