Foamed borosilicate glass block

Closed Cell Foamed Borosilicate Glass Block Lining System... 

Table 17-1 Chemical Composition of Foamed Borosilicate Glass Block...

Installed alone as a semi-refractory material, the foamed borosilicate glass block lining withstands hot face temperatures up to 960°F. It may also be used with refractory, chemical-resistant masonry or monolithic internal linings at temperatures above 960°F providing a unique combination of corrosion protection and heat conservation with little added weight and a lesser overall lining thickness. The foamed glass block may also be fabricated into nozzles, T-sec-tions, elbows, liner inserts and other custom shapes. 

This foamed borosilicate glass block lining system combines the desired properties of a number of other lining systems into one. Its features are ... 

Chemical Resistance—completely closed-cell, foamed borosilicate glass block is resistant to weak bases, all organic and almost all inorganic acids. It is not resistant to hydrofluoric acid, acid fluorides or strong alkalies. 

Figure 17-2 Foamed borosilicate glass block and urethane asphalt adhesive/membrane over fiberglass reinforced plastic.

Figure 17-3 Combination lining incorporating foamed borosilicate glass block reduces courses of brick required to lower temperature to acceptable level at the membrane.

Since the mid-1970s, the foamed borosilicate glass block lining system has been used extensively in the applications mentioned. In most exposures, with proper installation, the linings are performing well. In some cases, they have solved a corrosion problem in which other lining systems failed. In other cases, the block lining handled an environment where previously only considerably more expensive metal alloys have worked. 

As industrial processes change and new ones are developed, new solutions to corrosion must be found. As it continues to be adapted to new applications, the foamed borosilicate glass block lining system is providing one of those solutions. 

In the early 1970s, light, closed-cell foamed borosilicate glass block (see Chapter 17) were developed. These block, with a mass of only 12 Ib/cu.ft., will adhere to the underside of a concrete or steel cover by using a urethane asphaltic adhesive all joints between them are made the same way. Insulation of this type has been applied to the underside of both concrete and steel covers and has functioned successfully for a decade. 

Pennguard . [Atochem N. Am.] Inorganic foamed borosilicate glass block protectant formetals, concrete and FRP substrates fiom acid corrosion provides thermal insulation and energy conservation. ... 

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