Grounding and Bonding

Grounding and Bonding Method for Oil and Gas

Engineered Protection for Oilfield Assets

Grounding and bonding is the foundation for any lightning and static protection system. Bonding is the intentional connection of all exposed metallic items on an oilfield asset that are not designed to carry electric charge. This protects people from electrical shocks by eliminating dangerous potential difference between metal surfaces. Attachment to earth is critical; grounding needs to be for a specific purpose and to meet a specific standard. Unfortunately, incorrect size, placement, and routing of bonding conductors is common in the field.

UL rated lightning grounding cables are made from uncoated strands of loosely woven wires because lightning travels on the skin of conductors. Other UL 96 grounding and bonding components have the mass and surface contact needed to carry lightning’s current. Just like a chain, a bonding and grounding system is only as good as its weakest link. A properly installed system of UL 96 rated grounding and bonding components creates a low impedance path to ground.

Petro Guardian's recommended grounding and bonding installation includes:

Ground Rod
For the lightning and static protection system on a storage tank battery, an electrical continuity to ground is required. To achieve this, ground electrodes are driven diametrically opposed and at the farthest extents of the containment at the base of each ladder.

Grounded Truck Line
To establish electrical continuity, a conductor sized to safely carry lightning current is installed between the ground rods routed along the catwalk.

Bonding
The electrically isolated metal bodies such as the enardo valve base flange, bull plug, vent valve, and in-tank static neutralizer, and all metal bodies in the tank battery's vapor space are bonded to the grounded trunk line using the same size conductor.

Lightning Protection Conductor
Lightning rods (fuzzy balls) installed along the horizontal vent piping are connected via a lightning protection conductor. This conductor is further bonded to the grounded truck line to carry the lightning current safely to ground.

This grounding and bonding system establishes the foundation of an efficient lightning and static protection system for production and disposal facilities.

Grounding and bonding remains the foundation for a production or SWD tank battery’s protection system. Contact the team@petroguardian.com to find out how you can improve the integrity of grounding and bonding at your facility.

Grounding Services for Oil Field Assets

  • Soil resistance measurement
  • Grounding system resistance measurement
  • Equipotential ground verification
  • Grounding equipment rating verification
  • NFPA 780 and NFPA 77 compliance study
  • Lightning damage root cause analysis and shielding recommendations
  • Design and supply of grounding systems for storage tanks
  • Design and supply of grounding systems for process skids
  • Design and supply of grounding systems for SCADA/ communication towers
  • Design and supply of grounding systems for cathodic protection control unit
  • Design and supply of grounding system for well heads, separators, heater treaters, and vapor recovery
  • Design and supply of grounding systems for static control on transfer stations