1. XTO Energy Safety Training
Protection From Static Electricity

2. Concerned About Static Electricity?
Do you transfer flammable liquids into a plastic bucket?
Do you walk up the stairs on a tank without holding the handrail with your bare hands?
Is your gauge line grounded?

3. Static Electricity Safety Goals
Basic concepts of static electricity.
Static electricity hazards and safe work practices.
Quiz.

4. Flammable/Ignitable Material
Flammable gases vapors, or liquids can be ignited by static electricity.
To ensure a safe
operation XTO requires
we use specially designed electrical
equipment & safe work practices.

5. Basic Definitions
Static Electricity
Static Spark
Grounding
Bonding

6. Static Electricity
The accumulation of electrical charges on materials.
This will occur from the contact and separation of materials.
Contact and separation can also occur in a flowing liquid.

7. Static Spark
Discharge of electricity across a gap between two points not in contact with each other.
If a static spark has sufficient energy, it may ignite a flammable atmosphere.

8. Grounding
The connection
of conductive objects
to the earth.

9. Bonding
The connection of two or more conductive objects together by means of a conductor, such as a wire cable.

10. Sources of Static Electricity
Lightning
Manual tank gauging (movement of gauge line through product.)
Flow of liquids through a pipe or transfer hose.
Belts on pumps, & conveyor belts.
Moving vehicles & equipment (tires on roadway.)
Any others?

11. Static Hazard Control Grounding & Bonding Ground gauge lines
Keep bare hands
on railings
Don’t wear nylon clothing.
Eliminate product transfer into plastic buckets.

12. Charge Separation In Pipe
Static charges result from contact & separation that takes place in a flowing liquid.
Before flow, liquids contain equal quantities of (+) and (-) charges, they are electrically neutral.
During flow the charges are mixed in the liquid by turbulence & the opposite charge is conducted in the pipe wall.
Water & scale increase static generation.

13. Stray- Current Bypass Turn off cathodic protection.
Attach a bonding cable.
Remove the valve, spool, or open the line.
Test the atmosphere with a gas detector.
Bonding cable can be removed when the line is open; only, if the flammable atmosphere is not present.

14. Loading & Un-Loading of Tank Trucks
The hose coupling in loading hoses with internal wiring, bonds the liquid stream from the product to the truck.
The cable connection forms a ground between the truck & the earth.

15. Bonding During Container Filling
Conductive nozzle in contact with container.
No other bonding needed.

16. Bonding During Container Filling
Nozzle not in contact, a bonding wire is needed.

17. Grounding & Bonding During Truck to Truck Transfer
Attach ground cable, at least 35’ long to full truck.
Attach ground cable, from full truck, to ground rod at least 15’ away.
Ground rod minimum 8’ into earth.
Attach ground cable from full truck to empty truck (metal to metal)
Attach hose, with imbedded wire, from full truck to empty truck.

18. Grounding & Bonding During Truck to Truck Transfer.
Ground Cable
Full 2 1
Ground Cable
Load Hose 4 3
Ground Rod
Empty

19. Summary Basic definitions Hazards of static electricity.
Sources of static electricity.
Control of static charges.