33 C.F.R. § 154.826 Vapor compressors and blowers.
Title 33 - Navigation and Navigable Waters
(a) Each inlet and outlet to a compressor or blower which handles vapor that has not been inerted, enriched, or diluted in accordance with §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]
Title 33: Navigation and Navigable Waters
PART 154—FACILITIES TRANSFERRING OIL OR HAZARDOUS MATERIAL IN BULK
Subpart E—Vapor Control Systems
§ 154.826 Vapor compressors and blowers.