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Title 49

Displaying title 49, up to date as of 10/01/2026. Title 49 was last amended 10/01/2026.
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Title 49TransportationPart / Section
Subtitle BOther Regulations Relating to Transportation100 – 1699
Chapter IPipeline and Hazardous Materials Safety Administration, Department of Transportation100 – 199
Subchapter CHazardous Materials Regulations171 – 185
Part 178Specifications for Packagings178.1 – 178.1070
Subpart JSpecifications for Containers for Motor Vehicle Transportation178.301 – 178.348-5
§ 178.301xxx
§ 178.318Specification MC 201; container for detonators and percussion caps.
§ 178.318-1Scope.
§ 178.318-2Container.
§ 178.318-3Marking.
§ 178.320General requirements applicable to all DOT specification cargo tank motor vehicles.
§ 178.337Specification MC 331; cargo tank motor vehicle primarily for transportation of compressed gases as defined in subpart G of part 173 of this subchapter.
§ 178.337-1General requirements.
§ 178.337-2Material.
§ 178.337-3Structural integrity.
§ 178.337-4Joints.
§ 178.337-5Bulkheads, baffles and ring stiffeners.
§ 178.337-6Closure for manhole.
§ 178.337-7Overturn protection.
§ 178.337-8Openings, inlets, and outlets.
§ 178.337-9Pressure relief devices, piping, valves, hoses, and fittings.
§ 178.337-10Accident damage protection.
§ 178.337-11Emergency discharge control.
§ 178.337-12 [Reserved]
§ 178.337-13Supporting and anchoring.
§ 178.337-14Gauging devices.
§ 178.337-15Pumps and compressors.
§ 178.337-16Testing.
§ 178.337-17Marking.
§ 178.337-18Certification.
§ 178.338Specification MC-338; insulated cargo tank motor vehicle.
§ 178.338-1General requirements.
§ 178.338-2Material.
§ 178.338-3Structural integrity.
§ 178.338-4Joints.
§ 178.338-5Stiffening rings.
§ 178.338-6Manholes.
§ 178.338-7Openings.
§ 178.338-8Pressure relief devices, piping, valves, and fittings.
§ 178.338-9Holding time.
§ 178.338-10Accident damage protection.
§ 178.338-11Discharge control devices.
§ 178.338-12Shear section.
§ 178.338-13Supporting and anchoring.
§ 178.338-14Gauging devices.
§ 178.338-15Cleanliness.
§ 178.338-16Inspection and testing.
§ 178.338-17Pumps and compressors.
§ 178.338-18Marking.
§ 178.338-19Certification.
§§ 178.340-178.343 [Reserved]
§ 178.345General design and construction requirements applicable to Specification DOT 406 (§ 178.346), DOT 407 (§ 178.347), and DOT 412 (§ 178.348) cargo tank motor vehicles.
§ 178.345-1General requirements.
§ 178.345-2Material and material thickness.
§ 178.345-3Structural integrity.
§ 178.345-4Joints.
§ 178.345-5Manhole assemblies.
§ 178.345-6Supports and anchoring.
§ 178.345-7Circumferential reinforcements.
§ 178.345-8Accident damage protection.
§ 178.345-9Pumps, piping, hoses and connections.
§ 178.345-10Pressure relief.
§ 178.345-11Tank outlets.
§ 178.345-12Gauging devices.
§ 178.345-13Pressure and leakage tests.
§ 178.345-14Marking.
§ 178.345-15Certification.
§ 178.346Specification DOT 406; cargo tank motor vehicle.
§ 178.346-1General requirements.
§ 178.346-2Material and thickness of material.
§ 178.346-3Pressure relief.
§ 178.346-4Outlets.
§ 178.346-5Pressure and leakage tests.
§ 178.347Specification DOT 407; cargo tank motor vehicle.
§ 178.347-1General requirements.
§ 178.347-2Material and thickness of material.
§ 178.347-3Manhole assemblies.
§ 178.347-4Pressure relief.
§ 178.347-5Pressure and leakage test.
§ 178.348Specification DOT 412; cargo tank motor vehicle.
§ 178.348-1General requirements.
§ 178.348-2Material and thickness of material.
§ 178.348-3Pumps, piping, hoses and connections.
§ 178.348-4Pressure relief.
§ 178.348-5Pressure and leakage test.