Analysis of EMI on Steel Water/Gas PipingSources of EMI

Power lines Substations Electrical equipment Radio towers Mobile devices

Effects of EMI on Piping



Electrochemical corrosion

EMI can induce currents in the piping, which can lead to accelerated corrosion.

Electrical interference

EMI can interfere with electrical systems connected to the piping, such as cathodic protection systems.

Safety hazards

Extreme levels of EMI can pose safety risks to personnel working near the piping.

Mitigation Strategies



Physical Barriers



Shielding

Install conductive materials around the piping to block EMI.

Trenching

Bury the piping underground, which provides natural shielding.

Electrical Isolation



Electrical insulation

Coat the piping with insulating materials to reduce current flow.

Grounded connections

Connect the piping to a proper grounding system to dissipate EMI charges.

Current Diverters



Bonding wires

Connect the piping to surrounding metallic structures to provide an alternative path for EMI currents.

Surge protectors

Install surge protectors on electrical lines to suppress transient EMI events.

Monitoring and Maintenance



Inspections

Regularly inspect the piping for signs of EMI-induced corrosion or interference.

Monitoring

Use EMI meters to measure EMI levels around the piping and adjust mitigation measures accordingly.

Additional Considerations



Coordination with Utility Providers

Collaborate with utility providers to identify potential EMI sources and coordinate mitigation efforts.

Electromagnetic Modeling

Use computer simulations to predict EMI levels and optimize mitigation strategies.

Grounding Design

Ensure proper grounding design to effectively dissipate EMI charges.

References: [National Institute of Standards and Technology (NIST): Guide to the Reduction of EMI from Power Lines](https://www.nist.gov/publications/guide-reduction-emi-power-lines) [American Gas Association (AGA): Mitigating the Effects of EMI on Gas Piping](https://www.aga.org/press-releases/mitigating-effects-emi-gas-piping-shared-utility-corridors) [American Water Works Association (AWWA): Cathodic Protection of Water Pipe and Tank Systems](https://www.awwa.org/Portals/0/AWWA/PUBS/MANUALS/M42-Free.pdf) Flag for review