Foamglas Insulation Specified For LNG Expansion

Pittsburgh Corning's Foamglas insulation has been specified for a third expansion project at the Isle of Grain liquefied natural gas (LNG) reception terminal in Kent. For the initial two Grain LNG extensions, the Foamglas insulation was prefabricated and then applied on site. Owing to tight time constraints and lower site work efficiencies, CBI decided to move to a modularised construction approach, with large pipe racks constructed in Immingham, UK, by Fabricom Contracting.

The pipework was insulated in Fabricom's yard with strong Foamglas cellular glass insulation, then transported by ship to Grain. The double-layer, all-Foamglas insulation system with factory-pre-applied Terostat vapour retarder was demonstrated in second-phase installations. The second phase also showed the thermal expansion/contraction performance of Foamglas insulation when compared with plastic foams, allowing for two layers of Foamglas insulation instead of the three or four layers used with the combined PIR/Foamglas system of the first phase.

This system was then used for phase three, resulting in reduced labour time. Pittsburgh Corning supplied prefabricated quarter sections for pipes as large as 36in (91cm) in diameter, speeding up installation and improving quality by reducing the number of required field joints. The factory-pre-applied Terostat PCFR vapour retarder further minimised site work and provided full weather protection as soon as the Foamglas insulation was applied to the pipe. On two-layer cryogenic systems such as those in LNG processes, staggered joints can be realised using Foamglas pre-fabricated bends where the outside layer is longer than the inner layer and longitudinal joints are also prefabricated in a 90deg staggered orientation.

For the third-phase Grain modules, 260 bends and 3.5km of straight section - mostly double layer - were supplied, including nearly 2km at sizes from 16in to 36in. Pittsburgh Corning also offers additional Foamglas solutions, including pre-fabricated/pre-assembled T-pieces, flange/valve boxes and complete dome ends, as well as pre-applied jet-fire coatings. The construction on the eighth tank will take place in 2010, again using Foamglas cellular glass insulation. Foamglas insulation protects against the risks of insulation failure and fire.

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