U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 46Chapter IPart 56Subpart 56.50 - Subpart 56.50—Design Requirements Pertaining to Specific Systems
§ 56.50-1 - General (replaces 122).
§ 56.50-10 - Special gauge requirements.
§ 56.50-15 - Steam and exhaust piping.
§ 56.50-20 - Pressure relief piping.
§ 56.50-25 - Safety and relief valve escape piping.
§ 56.50-30 - Boiler feed piping.
§ 56.50-35 - Condensate pumps.
§ 56.50-40 - Blowoff piping (replaces 122.1.4).
§ 56.50-45 - Circulating pumps.
§ 56.50-50 - Bilge and ballast piping.
§ 56.50-55 - Bilge pumps.
§ 56.50-57 - [Reserved]
§ 56.50-60 - Systems containing oil.
§ 56.50-65 - Burner fuel-oil service systems.
§ 56.50-70 - Gasoline fuel systems.
§ 56.50-75 - Diesel fuel systems.
§ 56.50-80 - Lubricating-oil systems.
§ 56.50-85 - Tank-vent piping.
§ 56.50-90 - Sounding devices.
§ 56.50-95 - Overboard discharges and shell connections.
§ 56.50-96 - Keel cooler installations.
§ 56.50-97 - Piping for instruments, control, and sampling (modifies 122.3).
§ 56.50-103 - Fixed oxygen-acetylene distribution piping.
§ 56.50-105 - Low-temperature piping.
§ 56.50-110 - Diving support systems.
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