Structural Verification Per AS1692-2006
Integrity Testing
INTERSTITIAL PRESSURE TESTING
Structural air pressure testing of the interstitial space between inner and outer walls of self bunded tanks. We pressurise the bund to 2 PSI and hold for 2 hours, monitoring with NATA-calibrated gauges for any pressure drop that would indicate a breach in bund integrity.
Test Procedure
HOW WE TEST
1. Visual structural inspection — External examination of tank body, welds, bund walls, and fittings for visible damage or corrosion
2. Interstitial space pressurisation — Bund pressurised to 2 PSI using regulated air supply
3. 2-hour monitored hold — Continuous monitoring with start and end gauge photographs as evidence
4. NATA-calibrated gauge reading — Pressure readings taken with calibrated test equipment, photographic evidence recorded
5. Pass/fail report — Detailed test report with NATA calibration certificate for test equipment, suitable for insurance and regulatory requirements
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2 PSI
Test Pressure
2 Hours
Hold Period
NATA
Certified Gauges
Frequently Asked Questions
Pressure testing is required when there is suspected bund damage (impact, corrosion, weld failure), after any structural repair, for insurance claim verification, and as part of a comprehensive AS1940 compliance program. Some insurers require periodic pressure testing as a condition of coverage.
If the bund fails to hold pressure, we investigate the source of the leak using soapy water testing on accessible welds and fittings. We then provide a repair recommendation — minor weld repairs can often be completed on-site. For significant structural damage, we'll assess whether repair or replacement is the most cost-effective option.
Allow approximately 3-4 hours total on site. This includes visual inspection (30 mins), pressurisation and setup (30 mins), the 2-hour hold period, and final readings and documentation (30 mins). We can test multiple tanks sequentially during the same site visit.