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How to inspect the interstitial space of a double-wall fuel tank

2026-07-15 Leave a message

1. Online Vacuum & Pressure Monitoring

  • Primary inspection method – uses online vacuum or pressure monitoring systems.
  • Specialized equipment creates vacuum or pressure within interstitial space; continuously monitors fluctuations.
  • If inner or outer tank is damaged, pressure/vacuum changes significantly.
  • System triggers precision or catastrophic leak alarm, identifying fault location.

2. Interstitial Liquid Level & Fluid Detection

  • For liquid‑filled or inspection designs – detect leaks by monitoring liquid level changes.
  • Inner tank leak causes stored medium to flow into interstitial space, raising liquid level abnormally.
  • Periodic sampling using probes coated with detection paste or liquid level gauges.
  • Detects minute liquid leaks at the bottom of interstitial space.

3. Sensor Arrays & Intelligent Diagnostics

  • High‑precision sensor arrays – monitor humidity, specific gas concentrations, or liquid levels in real‑time.
  • Immediately transmit signals to central control console upon detecting abnormal substances.
  • Provides early warning of leak risks.
  • Ensures safe operation of the tank system.

4. Periodic Manual Inspections & Functional Testing

  • Essential complement to automation – qualified personnel perform regular manual inspections.
  • Check sensor sensitivity, piping integrity, and verify alarm effectiveness through simulated leak tests.
  • Preventive maintenance ensures monitoring system remains reliable.
  • Maintains long‑term operational integrity.
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