High Temperature Round Metallic Expansion Joints Thorburn's Round High Temperature Expansion Joints are designed in accordance with the Fifth and Seventh Editions Editions of the standards of the Expansion Joint Manufacturers Association (E.J.M.A) for use in dust collection and fume extraction duct systems. The pressure ranges are ±5psi, temperatures to 1800°F (982°C) depending on materials. Ductflex bellows are precision formed from cylinders of deep draw quality annealed sheets conforming to ASTM/ASME specifications. Bellows have a minimum of longitudinal seams, the same thickness as parent material, to insure uniform stress distribution and long service life. Sizes range
from 12inch I.D. to 20 feet and can be supplied with lining purge
nipples protective/insulating covers and special thermical packing
for dust application.
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FEA Analysis confirms the high levels of thermal stress
Telescopic Cone Shaped Liner |
Telescopic cone shaped liner. 
