The Pennguard™ block lining system, developed by ErgonArmor in the USA, is a borosilicate foamed glass block lining system. It has gained global recognition as the most reliable and durable non-metallic lining option for safeguarding the chimneys and flues against corrosion and permeation in plants. Compatible with various chimney and flue types, including concrete, metal, and brick masonry, it seamlessly forms a protective layer on their inner surfaces while ensuring both air-tightness and water-tightness without needs of structural modifications to the chimney.

1. This specification covers the recommended installation, quality control, and inspection guidance for the successful installation of the PENNGUARD Block lining system on metal, concrete, brick, and FRP surfaces.
2. At coal burning power plants, the PENNGUARD Block Lining System / Borosilicate glass block is used to protect carbon steel liners, breechings, heat recovery equipment, and inlet/outlet ductwork of wet FGD scrubbers from condensate permeation and acid corrosion. It is used in flue gas conveying equipment such as stacks and ductwork serving the power, chemical, metallurgical, petrochemical, pulp & paper and municipal waste incineration/sludge burning industries, to protect the substrate structures from acid corrosion.
3. FRP-constructed stacks, ducts, and other equipment, when lined with the PENNGUARD Block Lining System / Borosilicate glass block, can operate at higher temperatures due to the insulation characteristics of this lining system.
4. The PENNGUARD Block Lining System offers an acid corrosion resistant, lightweight, highly insulative lining for steel and concrete tanks and vessels including the covers of molten sulfur pits, acid pickling tanks, and acid storage tanks.
5. The PENNGUARD Block Lining System may be used as a chemical resistant backup to refractories and chemically resistant masonry/monolithic linings in such areas as hot gas inlets to chemical vessels, petrochemical heaters and furnaces.