[Code of Federal Regulations]
[Title 33, Volume 2]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 33CFR154.826]

[Page 318]
 
                TITLE 33--NAVIGATION AND NAVIGABLE WATERS
 
    CHAPTER I--COAST GUARD, DEPARTMENT OF TRANSPORTATION (CONTINUED)
 
PART 154--FACILITIES TRANSFERRING OIL OR HAZARDOUS MATERIAL IN BULK--Table of Contents
 
                    Subpart E--Vapor Control Systems
 
Sec. 154.826  Vapor compressors and blowers.

    (a) Each inlet and outlet to a compressor or blower which handles 
vapor that has not been inerted, enriched, or diluted in accordance with 
Sec. 154.824 of this subpart must be fitted with:
    (1) A detonation arrester;
    (2) A flame arrester; or
    (3) An explosion suppression system acceptable to the Commandant (G-
MSO).
    (b) If a reciprocating or screw-type compressor handles vapor in the 
vapor collection system, it must be provided with indicators and audible 
and visible alarms to warn against the following conditions:
    (1) Excessive discharge gas temperature at each compressor chamber 
or cylinder;
    (2) Excessive cooling water temperature;
    (3) Excessive vibration;
    (4) Low lube oil level;
    (5) Low lube oil pressure; and
    (6) Excessive shaft bearing temperatures.
    (c) If a liquid ring-type compressor handles vapor in the vapor 
collection system, it must be provided with indicators and audible and 
visible alarms to warn against the following conditions:
    (1) Low level of liquid sealing medium;
    (2) Lack of flow of liquid sealing medium;
    (3) Excessive temperature of the liquid sealing medium;
    (4) Low lube oil level;
    (5) Low lube oil pressure, if pressurized lubricating system; and
    (6) Excessive shaft bearing temperature.
    (d) If a centrifugal compressor, fan, or lobe blower handles vapor 
in the vapor collection system, construction of the blades and/or 
housing must meet one of the following:
    (1) Blades or housing of nonmetallic construction;
    (2) Blades and housing of nonferrous material;
    (3) Blades and housing of corrosion resistant steel;
    (4) Ferrous blades and housing with one-half inch or more design tip 
clearance; or
    (5) Blades of aluminum or magnesium alloy and a ferrous housing with 
a nonferrous insert sleeve at the periphery of the impeller.

[CGD 88-102, 55 FR 25429, June 21, 1990, as amended by CGD 96-026, 61 FR 
33666, June 28, 1996]