Metallic Expansion Joints - Thorburn Flex Inc

THORBURN
FLEXIBLE PIPING SPECIALIST
DUCTFLEX
ROUND METALLIC DUCTING EXPANSION JOINTS
ENVIRONMENTAL PROTECTION TECHNOLOGY
ALSO AVAILABLE IN
DUAL BELLOWS AND
RECTANGULAR DESIGNS
Thorburn Ductflex round expansion joints are made from welded tubes, then
roll formed on special forming machines. In sizes 1" up to 16' I.D.
THORBURN DUCTFLEX OPTIONS
COVERS
LINERS
External covers should be
specified to protect the bellows
from mechanical damage or
where the expansion joint will be
insulated. Thorburn standard
material is carbon steel.
Thorburn internal liners should
be specified when flow velocity
exceeds 25 FPS or where
abrasive particles in the gas
stream could cause erosion of
the bellows.
16' round environmental ducting expansion joints
being shiped to an iron ore smelter application.
Shown with protective covers.
HOW TO ORDER THORBURN ROUND DUCTFLEX SERIES SDF DUCTING EXPANSION JOINTS
EXPLANATION
Size O.A.L. Series End Style or Temp. Design Bellows Ends Liner Cover
Duct Type Convo- ºF Pressure Material Material Material Material
(inches) (inches) lutions Positive/
Negative (For material codes, see page 12)
(in. H 2
O)
PART NUMBER EXAMPLE
48 15 SDF FF C 800 75/50 B5 E3 L5 C0
for 48" I.D. by 15" O.A.L. single Ductflex belows expansion joint with flange ends "C" style with 800ºF with design pressure 75 to 50 psi, 321SS. Ends in
316SS and 321 carbon steel cover.
Note 1: Series DDF = Universal bellows.
Note 2: For all material codes please see page 12.
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