U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 46Chapter IPart 153Subpart B - Subpart B—Design and Equipment

GENERAL VESSEL REQUIREMENTS
§ 153.190 - Stability requirements.
§ 153.201 - Openings to accommodation, service or control spaces.
§ 153.208 - Ballast equipment.
§ 153.209 - Bilge pumping systems.
§ 153.214 - Personnel emergency and safety equipment.
§ 153.215 - Safety equipment lockers.
§ 153.216 - Shower and eyewash fountains.
§ 153.217 - Access to enclosed spaces and dedicated ballast tanks.
§ 153.219 - Access to double bottom tanks serving as dedicated ballast tanks.

CARGO CONTAINMENT SYSTEMS
§ 153.230 - Type I system.
§ 153.231 - Type II system.
§ 153.232 - Type III system.
§ 153.233 - Separation of tanks from machinery, service and other spaces.
§ 153.234 - Fore and aft location.
§ 153.235 - Exceptions to cargo piping location restrictions.
§ 153.236 - Prohibited materials.
§ 153.238 - Required materials.
§ 153.239 - Use of cast iron.
§ 153.240 - Insulation.

CARGO TANKS
§ 153.250 - Double-bottom and deep tanks as cargo tanks.
§ 153.251 - Independent cargo tanks.
§ 153.252 - Special requirement for an independent cargo tank.
§ 153.254 - Cargo tank access.
§ 153.256 - Trunks, domes, and openings of cargo tanks.
§ 153.266 - Tank linings.

PIPING SYSTEMS AND CARGO HANDLING EQUIPMENT
§ 153.280 - Piping system design.
§ 153.281 - Piping to independent tanks.
§ 153.282 - Cargo filling lines.
§ 153.283 - Valving for cargo piping.
§ 153.284 - Characteristics of required quick closing valves.
§ 153.285 - Valving for cargo pump manifolds.
§ 153.292 - Separation of piping systems.
§ 153.294 - Marking of piping systems.
§ 153.296 - Emergency shutdown stations.
§ 153.297 - Emergency actuators at the point of cargo control.

CARGO HANDLING SPACE VENTILATION
§ 153.310 - Ventilation system type.
§ 153.312 - Ventilation system standards.
§ 153.314 - Ventilation of spaces not usually occupied.
§ 153.316 - Special cargo pumproom ventilation rate.

CARGO PUMPROOMS
§ 153.330 - Access.
§ 153.332 - Hoisting arrangement.
§ 153.333 - Cargo pump discharge pressure gauge.
§ 153.334 - Bilge pumping systems.
§ 153.336 - Special cargo pump or pumproom requirements.

CARGO VENTING SYSTEMS
§ 153.350 - Location of B/3 vent discharges.
§ 153.351 - Location of 4m vent discharges.
§ 153.352 - B/3 and 4 m venting system outlets.
§ 153.353 - High velocity vents.
§ 153.354 - Venting system inlet.
§ 153.355 - PV venting systems.
§ 153.358 - Venting system flow capacity.
§ 153.360 - Venting system restriction.
§ 153.361 - Arrangements for removal of valves from venting systems having multiple relief valves.
§ 153.362 - Venting system drain.
§ 153.364 - Venting system supports.
§ 153.365 - Liquid overpressurization protection.
§ 153.368 - Pressure-vacuum valves.
§ 153.370 - Minimum relief valve setting for ambient temperature cargo tanks.
§ 153.371 - Minimum relief valve setting for refrigerated cargo tanks.
§ 153.372 - Gauges and vapor return for cargo vapor pressures exceeding 100 kPa (approx. 14.7 psia).

CARGO GAUGING SYSTEMS
§ 153.400 - General requirements for gauges.
§ 153.404 - Standards for containment systems having required closed gauges.
§ 153.406 - Standards for containment systems having required restricted gauges.
§ 153.407 - Special requirements for sounding tube gauges.
§ 153.408 - Tank overflow control.
§ 153.409 - High level alarms.

CARGO TEMPERATURE CONTROL SYSTEMS
§ 153.430 - Heat transfer systems; general.
§ 153.432 - Cooling systems.
§ 153.434 - Heat transfer coils within a tank.
§ 153.436 - Heat transfer fluids: compatibility with cargo.
§ 153.438 - Cargo pressure or temperature alarms required.
§ 153.440 - Cargo temperature sensors.

SPECIAL REQUIREMENTS FOR FLAMMABLE OR COMBUSTIBLE CARGOES
§ 153.460 - Fire protection systems.
§ 153.461 - Electrical bonding of independent tanks.
§ 153.462 - Static discharges from inert gas systems.
§ 153.463 - Vent system discharges.
§ 153.465 - Flammable vapor detector.
§ 153.466 - Electrical equipment.

DESIGN AND EQUIPMENT FOR POLLUTION CONTROL
§ 153.470 - System for discharge of NLS residue to the sea: Categories A, B, C, and D.
§ 153.480 - Stripping quantity for Category B and C NLS tanks on ships built after June 30, 1986: Categories B and C.
§ 153.481 - Stripping quantities and interim standards for Category B NLS tanks on ships built before July 1, 1986: Category B.
§ 153.482 - Stripping quantities and interim standards for Category C NLS tanks on ships built before July 1, 1986: Category C.
§ 153.483 - Restricted voyage waiver for Category B and C NLS tanks on ships built before July 1, 1986: Category B and C.
§ 153.484 - Prewash equipment.
§ 153.486 - Design and equipment for removing NLS residue by ventilation: Categories A, B, C, and D.
§ 153.488 - Design and equipment for tanks carrying high melting point NLSs: Category B.
§ 153.490 - Cargo Record Book and Approved Procedures and Arrangements Manual: Categories A, B, C, and D.
§ 153.491 - Waiver of certain equipment for dedicated cargo tanks.

SPECIAL REQUIREMENTS
§ 153.556 - Special requirements for sulfuric acid and oleum.
§ 153.557 - Special requirements for hydrochloric acid.
§ 153.558 - Special requirements for phosphoric acid.
§ 153.559 - Special requirements for nitric acid (less than 70 percent).
§ 153.560 - Special requirements for Alkyl (C7-C9) nitrates.
§ 153.565 - Special requirement for temperature sensors.
§ 153.602 - Special requirements for cargoes reactive with water.
§ 153.500 - Inert gas systems.
§ 153.501 - Requirement for dry inert gas.
§ 153.515 - Special requirements for extremely flammable cargoes.
§ 153.520 - Special requirements for carbon disulfide.
§ 153.525 - Special requirements for unusually toxic cargoes.
§ 153.526 - Toxic vapor detectors.
§ 153.527 - Toxic vapor protection.
§ 153.530 - Special requirements for alkylene oxides.
§ 153.545 - Special requirements for liquid sulfur.
§ 153.554 - Special requirements for acids.
§ 153.555 - Special requirements for inorganic acids.

TESTING AND INSPECTION
§ 153.806 - Loading information.
§ 153.808 - Examination required for a Certificate of Compliance.
§ 153.809 - Procedures for having the Coast Guard examine a vessel for a Certificate of Compliance.
§ 153.812 - Inspection for Certificate of Inspection.
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