§154.1335. Pressure and vacuum protection.
46 C.F.R. § 154.1335
Each cargo tank must have the following:
A pressure gauge that—
Monitors the vapor space;
Is readable at the tank; and
Has remote readouts at the cargo control station.
If vacuum protection is required under § 154.804, a vacuum gauge meeting paragraphs (a)(1)(i), (a)(1)(ii), and (a)(1)(iii) of this section.
The vessel must have at least one high pressure alarm that:
Actuates before the pressure in any cargo tank exceeds the maximum pressure specially approved by the Commandant (CG-OES); and
Actuates an audible and visual alarm at the cargo control station, and a remote group alarm in the wheelhouse.
If vacuum protection is required under § 154.804, the vessel must have at least one low pressure alarm that:
Actuates before the pressure in any cargo tank falls below the minimum pressure specially approved by the Commandant (CG-522); and
Actuates an audible and visual alarm at the cargo control station, and a remote group alarm in the wheelhouse.
At least one pressure gauge must be fitted on each:
Enclosed hold;
Enclosed interbarrier space;
Cargo pump discharge line;
Liquid cargo manifold; and
Vapor cargo manifold.
There must be a local manifold pressure gauge between each manifold stop valve and each hose connection to the shore.
Notes, amendments, and revision history
Amendments
[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]
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 82-063b, 48 FR 4782, Feb. 3, 1983]