46 C.F.R. § 98.33-7 Pipe and hose connections.
Title 46 - Shipping
If a portable tank authorized under §98.33–5 of this part has a pipe or hose connection in its bottom, the connection must have a manually operated valve and a bolted flange, threaded cap, or similar device, to protect against leakage of the tank's contents.
Title 46: Shipping
PART 98—SPECIAL CONSTRUCTION, ARRANGEMENT, AND OTHER PROVISIONS FOR CERTAIN DANGEROUS CARGOES IN BULK
Subpart 98.33—Portable Tanks for Certain Grade E Combustible Liquids and Other Regulated Materials
§ 98.33-7 Pipe and hose connections.
