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2. Leak-down tester - Wikipedia

   en.wikipedia.org/wiki/Leak-down_tester

   A compression tester. Leak-down testing is a static test. Leak-down tests cylinder leakage paths. Leak-down primarily tests pistons and rings, seated valve sealing, and the head gasket. Leak-down will not show valve timing and movement problems, or piston movement related sealing problems. Any test should include both compression and leak-down.

3. Hydrostatic test - Wikipedia

   en.wikipedia.org/wiki/Hydrostatic_test

   A leak may also be a failure criterion, but it may be that the leak is due to poor sealing of the test equipment. If the vessel fails, it will normally go through a condemning process marking the cylinder as unsafe. [citation needed] The information needed to specify the test is stamped onto the cylinder.

4. Testing and inspection of diving cylinders - Wikipedia

   en.wikipedia.org/wiki/Testing_and_inspection_of...

   A hydrostatic test involves pressurising the cylinder to its test pressure (usually 5/3 or 3/2 of the working pressure) and measuring its volume before and after the test. A permanent increase in volume above the tolerated level means the cylinder fails the test and must be permanently removed from service. [3]: sect. 5.7.3

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6. Leak detection - Wikipedia

   en.wikipedia.org/wiki/Leak_detection

   A leak appearing within an analytic region (a rule added to the camera) is immediately analyzed for its attributes, including thermal temperature, size, and behaviour (e.g. spraying, pooling, spilling). When a leak is determined to be valid based on set parameters, an alarm notification with leak video is generated and sent to a monitoring station.

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9. List of natural gas and oil production accidents in the ...

   en.wikipedia.org/wiki/List_of_natural_gas_and...

   January 23, 2018 - 5 workers hospitalized after hydrofluoric acid leak at a refinery in Trainer, Pennsylvania. [152] June 21, 2019 - A propane and hydrofluoric acid leak caused a low-hanging vapor cloud, which ignited and resulted in 3 sequential explosions at a refinery in Philadelphia, Pennsylvania. The first two explosions where of vessels ...