Vanessa Case Studies Heo

Cryogenic Configurations inside LNG Terminals

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General Process Information

The choice of a buttweld body in LNG terminals derives from the need to reduce risks generated by gas leakage, and this is becoming more and more common around the world. Often, inline maintenance capabilities are also required and, as the valve market is mainly responding with side entry solutions, these types of valves are typically sought after.

Although cryogenic buttweld side entry valves are often specified during FEED phase, EPCs are increasingly discovering the advantages of switching to top entry valves thanks to their high operability and safety. 

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Valve Inspection

Application: A side entry valve features a hatch on one side to allow operators to access the valve trim by hands, arms or even by physically entering inside the pipe in case of large sizes.

Challenges: While a simple inspection may be considered practical, real maintenance or repair work becomes extremely difficult or impossible for maintenance personnel. In addition, there are serious hazards for the safety of people and plant operation alike. Vanessa Series 30,000's core benefits come from its robust triple offset non-rubbing design with Stellite® seat overlays and solid seal rings for this cryogenic application. Thus, the product has an extremely long lifecycle, which makes maintenance largely unnecessary. Inline access requirement is guaranteed through our top entry design, should unpredictable and extreme valve repair needs arise. With Vanessa Series 30,000 cryogenic top entry valves, direct interventions on all trim components to improve operability or tightness can be carried out in total safety (i.e., by removing the trim), thus eliminating exposure to health risks for operators working in direct contact with the pipe.

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