CURRENT/RECENT WORLDWIDE USERS of RESISTANCE WELDED CLAD PLATE for DUCTWORK, CHIMNEY LINERS AND ABSORBERS in FGD UNITS

摘要

Resistance welded clad plate offers a reliable, cost effective solution to severe corrosion problemsrnencountered in wet Flue Gas Desulfurization systems for either new or retro-fit construction. Resistancernwelded clad plate weld-bonds thin gauge, .020" to .080" (.50 mm to 2.00 mm) thick, corrosion resistantrnmaterials to relatively thick, .063" to 3.0" (1.6 mm to 76 mm), significantly less expensive carbon steel.rnResistance welded clad plate batten bar design and resistance welded clad plate overlap panel design,rnhave been extensively used in FGD systems since 1984 with over 1,000,000 s.f. (93,000 m~2) used inrnoutlet ductwork, chimney liners and absorbers. In addition resistance welded clad plate has been usedrnand proven successful in hundreds of demanding applications in the chemical process industry (that inrngeneral have more severe corrosive environments than FGD applications, with up to full vacuumrnconditions) since 1970.This paper discusses the resistance welding clad plate manufacturing process, provides a detailed list ofrnusers and installations, and presents fabrication techniques for both new and retrofit FGD constructionrnwith typical costs using various clad composites.