February 2019, Vol. 246, No. 2

Features

Ensuring LNG Liquefaction Facilities’ System Tightness

By Nirmal Surendran Menon, Institution of Mechanical Engineers (IMechE), New Zealand  System “tightness testing” is the last stage before inerting (the introduction of a non-combustible gas into a closed system) and the introduction of hydrocarbon and is a vital safety step in the start-up sequence. All equipment and pipe-work should have been pressure tested during construction and air blown post pressure testing, but during the various stages many flanges, vents and drains will have been opened.    This is the final system integrity check before introducing hazardous materials into the plant. The purging with inert gases, which follows, is to rem

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