I.S.M Cargo survey conducts ultrasonic hatch cover leak detection testing. Hatch cover testing and leak detection remain the weak link in the chain for many owners, surveyors and insurers. Only ultrasonic testing gives the surveyor the correct assessment of the required compression between rubber packing and compression bar.
Tightness and leak detection testing
The most efficient way to ensure tightness is to test it using ultrasonic’s. The testing can be either fully integrated into the production process, or carried out later as a control. In the case of hatch cover tightness and leak testing a transmitter is placed in the cargo hold and the hatch is closed. Ultrasonic waves are transmitted throughout the hold and with the detector, leaks or weak points between the rubber packing and compression bar, will be detected to exact location. The strength of the signals received will reveal the extent of the problem.
Ultrasonic is more than just another form of testing tightness. It offers a complete, global solution with unheard-of accuracy and reliability. Accuracy that has received Classification Society Type Approval.
Hose and chalk tests demonstrate whether or not there is contact between the rubber packing and compression bar but give no indication of the actual compression. Once at sea, it is often too late to see the shortcomings of this method. Only ultrasonic testing can show you when you have the required or acceptable compression.