[Code of Federal Regulations]
[Title 33, Volume 2]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 33CFR154.808]

[Page 314]
 
                TITLE 33--NAVIGATION AND NAVIGABLE WATERS
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 154--FACILITIES TRANSFERRING OIL OR HAZARDOUS MATERIAL IN BULK--Table 
of Contents
 
                    Subpart E--Vapor Control Systems
 
Sec. 154.808  Vapor control system, general.

    (a) A vapor control system design and installation must eliminate 
potential overfill hazards, overpressure and vacuum hazards, and sources 
of ignition to the maximum practical extent. Each remaining hazard 
source which is not eliminated must be specifically addressed in the 
protection system design and operational requirements.
    (b) Vapor collection system piping and fittings must be in 
accordance with ANSI B31.3 and designed for a maximum allowable working 
pressure of at least 150 psig. Valves and flanges must be in accordance 
with ANSI B16.5 or B16.24, 150 pound class.
    (c) All electrical equipment used in a vapor control system must 
comply with NFPA 70.
    (d) Any pressure, flow, or concentration indication required by this 
part must provide a remote indicator on the facility where the cargo 
transfer and vapor control systems are controlled.
    (e) Any alarm condition specified in this part must activate an 
audible and visible alarm where the cargo transfer and vapor control 
systems are controlled.
    (f) The vapor control system must be separated or insulated from 
external heat sources to limit vapor control system piping surface 
temperature to not more than 177 C. (350 F.) during normal 
operation.
    (g) A means must be provided to eliminate any liquid condensate from 
the vapor collection system which carries over from the vessel or 
condenses as a result of an enrichment process.
    (h) If a liquid knockout vessel is installed it must have:
    (1) A means to indicate the level of liquid in the device;
    (2) A high liquid level sensor that activates an alarm; and
    (3) A high high level sensor that closes the remotely operated cargo 
vapor shutoff valve required by Sec. 154.810(a) of this subpart and 
shuts down any compressors or blowers prior to liquid carrying over from 
the vessel to the compressor or blower.
    (i) Vapor collection piping must be electrically grounded and 
electrically continuous.
    (j) If the facility handles inerted vapors of cargoes containing 
sulfur, provisions must be made to control heating from pyrophoric iron 
sulfide deposits in the vapor collection line.