Tank Farms/Terminals

Sites with tanks and underground piping have numerous applications involving DC isolation and AC grounding. Often tank farms and terminals have insulated joints separating transportation piping from the facility. Such piping may be subject to induced AC voltage due to overhead power lines, which can appear at the insulated joint at the facility perimeter. Both over-voltage problems can be addressed by DEI products.

For more information, see:
Insulated Joint Protection
AC Voltage Mitigation

Often, tanks or piping have grounded electrical equipment, such as motors, mounted on them, which affects the cathodic protection. As compared to using insulated joints or fittings to solve this problem, DEI offers third-party listed (certified) decouplers that meet electrical codes and block CP current. The products can also be used to separate one tank CP system from another.

For more information, see:
Decoupling Electrical Equipment Grounds

If the above situation is of interest, but the site has too many bonds to the grounding system, then a simpler solution is to isolate the entire facility from the power company grounding grid.

For more information, see:
Decoupling Power Company Grounds

As most tank farms and terminals are classified (hazardous) locations, DEI offers products listed for use in Div 1, Div 2, and Zone 2 areas.