Airports

Airport fueling systems utilize cathodic protection on jet fuel piping, which requires isolation from ground in order to have adequate protection. Isolation is accomplished through insulated joints and coatings, and DEI specializes in providing over-voltage protection for these systems. The Army Corp of Engineers specifies the DEI model OVP for military facilities that need insulated joint protection. At either above-grade insulated joints or those in hydrant pits, the OVP is rated and third-party listed (certified) for hazardous location use.

For more information, see:
Insulated Joint Protection

Fueling systems also utilize motorized pumps and valves that can compromise the cathodic protection because of the required electrical grounding conductor. DEI solves this problem through the use of a third-party listed decoupler that can be placed in series in the ground, and eliminates the need for insulating joints on either side of the grounded electrical equipment. The device is also listed for hazardous location use.

This same application addresses cathodically protected tanks that require decoupling from the site grounding grid in order to achieve adequate cathodic protection levels.

For more information, see:
Decoupling Electrical Equipment Grounds

For a review of both applications, specific to airports, see:
Airport Fueling Systems Isolation/Bonding