SGS Korea completes LNG carrier leak-test
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SGS SA - Industrial Services product story
Edited by the Engineeringtalk editorial team
Feb 23, 2009
SGS Korea has performed a helium leak test on an LNG carrier for the first time outside Korea.
SGS won an international order from Sembawang Shipyard in Singapore.
LNG is transported in ships with double hulls, which protect the cargo systems from damage or leaks.
The helium leak test is performed by introducing helium gas into the object to be tested and pressurising it slightly.
The helium gas flows through any welding-seam cracks or pin holes; leaking helium gas is then sucked into a sniper attached to a helium mass-spectrometer on the other side.
The gas is ionised and a helium ion collector sends an amplified signal to the indicator.
The leakage is then measured by signal strength.
To ensure good test results, specific procedures have been designed for these LNG vessel inspections.
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