Code of Federal Regulations > Title 33 > Chapter I > Part 157 > Subpart D - Subpart D—Crude Oil Washing (COW) System on Tank Vessels

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Nov 22, 2025

GENERAL

§ 157.100 - Plans for U.S. tank vessels: Submission.

§ 157.102 - Plans for foreign tank vessels: Submission.

§ 157.104 - Scale models.

§ 157.106 - Letter of acceptance.

§ 157.108 - Crude Oil Washing Operations and Equipment Manual for U.S. tank vessels: Submission.

§ 157.110 - Crude Oil Washing Operations and Equipment Manual for foreign tank vessels: Submission.

§ 157.112 - Approved Crude Oil Washing Operations and Equipment Manual.

§ 157.114 - Crude Oil Washing Operations and Equipment Manual: Not approved.

§ 157.116 - Required documents: U.S. tank vessels.

§ 157.118 - Required documents: Foreign tank vessels.

§ 157.120 - Waiver of required documents.

DESIGN, EQUIPMENT, AND INSTALLATION

§ 157.122 - Piping, valves, and fittings.

§ 157.124 - COW tank washing machines.

§ 157.126 - Pumps.

§ 157.128 - Stripping system.

§ 157.130 - Crude oil washing with more than one grade of crude oil.

§ 157.132 - Cargo tanks: Hydrocarbon vapor emissions.

§ 157.134 - Cargo tank drainage.

§ 157.136 - Two-way voice communications.

§ 157.138 - Crude Oil Washing Operations and Equipment Manual.

INSPECTIONS

§ 157.140 - Tank vessel inspections.

§ 157.142 - Letter of acceptance: Inspections.

§ 157.144 - Tank vessels of the same class: Inspections.

§ 157.146 - Similar tank design: Inspections on U.S. tank vessels.

§ 157.147 - Similar tank design: Inspections on foreign tank vessels.

§ 157.148 - COW system: Evidence for inspections.

§ 157.150 - Crude Oil Washing Operations and Equipment Manual: Recording information after inspections.

PERSONNEL

§ 157.152 - Person in charge of COW operations.

§ 157.154 - Assistant personnel.

COW OPERATIONS

§ 157.155 - COW operations: General.

§ 157.156 - COW operations: Meeting manual requirements.

§ 157.158 - COW operations: Changed characteristics.

§ 157.160 - Tanks: Ballasting and crude oil washing.

§ 157.162 - Crude oil washing during a voyage.

§ 157.164 - Use of inert gas system.

§ 157.166 - Hydrocarbon emissions.

§ 157.168 - Crew member: Main deck watch.

§ 157.170 - COW equipment: Removal.

§ 157.172 - Limitations on grades of crude oil carried.