There are many design variations in existing oil treating vessels with new designs being introduced continually. The preparation of a recommended practice for the cathodic protection of each individual vessel design is not practical. Therefore, this recommended practice is not specific with respect to one or more vessel designs, but rather is a general guide for the application of effective cathodic protection to all oil treating vessels. This recommended practice includes design criteria, the selection and installation of applicable systems, and the operation, monitoring and maintenance of installed systems. Nothing contained in this standard is intended to conflict with applicable local, state or Federal codes, including OSHA regulations.

This NACE standard (recommended practice), issued by Group Committee T-1 on Corrosion Control in Petroleum Production, was prepared by Task Group T-1 E-6 of Unit Committee T-1 Eon Cathodic Protection of Oil Field Equipment. The Task Group was composed of corrosion consultants, corrosion engineers from oil and gas producing companies, representatives from manufacturers and others concerned with internal corrosion control in oil treating vessels.

1.1.1 This recommended practice presents approved practices for the cathodic protection of the interior of oil treating vessels, part or all of whose interior surfaces are contacted by water, under the following headings:

Section 2: Definitions

Section 3: Determination of Need for Cathodic Protection

Section 4: Design and Selection of Cathodic Protection Systems

Section 5: Anode Installation Methods

Section 6: Reference Electrode Entrance

Section 7: Criteria for Protection

Section 8: Monitoring, Records, and Maintenance

Section 9: Safety

Historical Document 1975