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Survey & Testing

Current Attenuation Test (CAT Survey)

Measurement of how the protective current decays along the pipeline. An AC signal is injected at a test point and the current is measured at intervals along the route, so that sections with deteriorated coating or an unintended current drain can be identified without excavation.

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Scope of Work

What This Service Covers

  • AC signal injection at drain points and test lead points
  • Current magnitude and phase measurement at intervals along the route
  • Attenuation gradient calculation section by section
  • Coating conductance and average coating resistance assessment
  • Detection of shorted casings, foreign contacts and unintended bonds
  • Correlation with test lead point potential records

Deliverables

  • Current attenuation profile plots for each section
  • Coating conductance and coating resistance figures per section
  • Ranked list of sections requiring detailed survey or repair
  • Survey report with recommendations for further assessment

Applicable Standards

  • NACE SP0169
  • NACE SP0502
  • BS EN 13509

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Send us your requirement

Share the line size, route length, soil conditions and the standard you work to. We will revert with a suitable design approach, the scope of work and our offer.

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Amit Kumar Giri

Proprietor

+91 89611 74927Chat with us on WhatsApp

B/2/H/10, Parikshit Roy Lane, P.O. Tangra, P.S. Entally,
Kolkata - 700015, West Bengal