AS4853 Electrical Hazard Assessment

Wherever a pipeline is close to or running parallel to a HV line there exists a potential for electrical hazards on the pipeline. Current industry trends including the Australian Standard ‘AS4853 electrical hazards on metallic pipelines’ take a risk assessment based approach to hazard identification and management. Hazards to pipelines from nearby HV lines can include: Earth Potential Rise (EPR) from faults at nearby assets transferring voltage to nearby pipeline appurtenances through the soil, Low frequency induction (LFI) creating voltage on the pipeline due to faults over a parallel conductor and capacitive coupling causing voltage on an unearthed pipeline subject to an electric field beneath a high voltage line. This presentation talks about electrical hazard assessment starting with a conservative first-pass assessment and working up to detailed assessment.

Pipeline Interference
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