ISO Tank Container Periodic CSC Test Manual
Mandatory technical standards for 2.5-year intermediate pneumatic and 5-year periodic hydrostatic re-certification: ultrasonic shell thickness, relief valve pop testing, and surveyor stamping.
01 Container Plate & Inspection Scope
02 CSC Re-Certification Output
Zero pitting corrosion or structural cavitation detected on lower barrel run.
Next intermediate 2.5-year test deadline: +30 months from survey date.
International Regulations on Periodic Tank Container Testing
Unlike domestic over-the-road tank trailers governed solely by the US Department of Transportation, intermodal ISO tank containers travel globally across maritime container ships, international railways, and domestic highways. Consequently, every tank container must strictly conform to the International Convention for Safe Containers (CSC) and IMDG Code Chapter 6.7 periodic inspection mandates.
2.5-Year Intermediate Inspection
At 2.5 years (30 months) after manufacture or the last 5-year test, the tank must undergo an intermediate inspection. The vessel is pressurized pneumatically with dry air or nitrogen to a minimum of 25% MAWP or 1.0 bar, while all gaskets, valves, bursting discs, and manhole seals are tested with leak detection fluid. Relief valves are removed and calibrated on a bench test stand.
5-Year Major Hydrostatic Retest
At 5 years (60 months), the container must undergo a comprehensive hydrostatic pressure test. The tank is filled 100% with water, pressurized to 1.5 times MAWP (e.g., 6.0 bar for a 4.0 bar tank), and held for 30 minutes under the physical witness of a recognized classification society surveyor (ABS, DNV, BV). The surveyor physically stamps the new test date (e.g., "10/26 H") into the stainless CSC data plate.
Enterprise ISO Tank Fleet Compliance Tracking in Exspeedite
Transporting chemicals in an out-of-date ISO tank container results in immediate impoundment at port gates and catastrophic carrier liability. Exspeedite tracks CSC inspection plate dates across customer-owned and leased container fleets, alerting dispatchers 90 days before test expiration and locking container assignment to prevent non-compliant loadings.