Description of Incident
A Liquified Natural Gas (LNG) plant has recently identified instances of corrosion underneath instrument tubing block clamps. This corrosion has led to tubing failure and leaks.
- · a hydraulic oil leak on a loading arm hydraulic system
- · instruments leak on an ethylene compressor discharge line from a ½ inch stainless steel instrument tube. The pressure in the line at the time was 6.5 barg. The line can operate up to 9 barg.
A survey of similar installations across the facility found further evidence of corrosion particularly in marine environments.
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