UFC 3-570-06
JANUARY 31 2003
CHAPTER 3
REQUIREMENTS
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APPLICABLE STANDARDS. Installed CP systems must provide protective
potential satisfying Chapter 6 of this handbook and appropriate NACE Standards.
RP0169, Corrosion Control of External Corrosion on Underground or
Submerged Metallic Piping Systems.
RP0285, Corrosion Control of Underground Storage Tanks By Cathodic
Protection.
RP0388, Impressed Current Cathodic Protection of Internal Submerged
Surfaces of Steel Water Storage Tanks.
RP0193, External Cathodic Protection of On-Grade Metallic Storage Tank
Bottoms.
RP0196, Galvanic Anode Cathodic Protection of Internal Submerged
Surfaces of Steel Water Storage Tanks.
All structure-to-earth potentials must be potential drop (IR) free in
accordance with RP0169 or other appropriate NACE standard.
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DESIGN AND CONSTRUCTION CONSIDERATIONS. The design and
construction considerations that follow are based on experience and sound engineering
practices. Corrosion control and cathodic protection personnel should ensure they are
incorporated in projects and work orders where appropriate.
3-2.1
protective coatings in soil resistivities below 10,000 ohm-centimeters at installation
depth at any point along the pipeline.
3-2.2
Soil Resistivities. When soil resistivities are above 10,000 ohm-centimeters
at installation depth along the entire pipeline, ductile or cast iron pipe will require bonded
joints only.
3-2.3
Joint Bonds. Joint bonds must use No. 4 AWG insulated wire.
3-2.4
Thermite Welds and Exposed Copper Wire. Thermite welds and exposed
copper wire must be coated.
3-2.5
Copper. Copper water service lines and brass valves must be dielectrically
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