Metallic Expansion Joints - Thorburn Flex Inc

THORBURN
FLEXIBLE PIPING SPECIALIST
DUAL-FLEX DFT
TIED UNIVERSAL EXPANSION JOINT SYSTEM
One important advantage found in Thorburn's Dual-Flex
Model DFT is that the piping system does not have to be
in one plane. The two horizontal legs may lie at any angle
in the horizontal plane.
Where dimensionally feasable, Thorburn's Dual-Flex
Model DFT should be designed to fill the extra offset leg
so that its expansion is absorbed within the tie rods as
axial movement. If this is not possible, the growth of the
vertical piping leg outside the tied rods must be absorbed
by bending in the horizontal legs. To eliminate this deflection,
Thorburn can supply its tied universal expansion joints
with two 90º elbows.
The tie rod attachments are then located at the centerline
of each elbow, therefore the bellows can now absorb the
total amount of thermal growth in the vertical leg of the
piping system. Please refer to the sketch below for
demonstration.
Due to the fact that the tie rods on Thorburn Dual-Flex Model
DFT absorbs all pressure loads, the piping system only needs
intermediate anchors. Directional guiding is all that is necessary.
HOT
PG
IA
DFT-EE
AXIAL MOVEMENT HOT
HOT
IA: Intermediate Anchor
PG: Planar Guide
DFT-EE: Tied Universal Expansion
Joint with 90º elbows
108" diameter universal expansion joint
Thorburn Model DFT-EE is a tied universal expansion joint
with elbow end connections designed to fill the entire offset
leg so that its expansion is absorbed within the tie rods as
axial movement. The movements in the horizontal lines are
absorbed as lateral deflectors by Thorburn's Dual-Flex DFT-
EE expansion joint system.
Though Thorburn catalogue shows only sizes up to
48", Thorburn can supply and manufacture joints up
to 144" inches.
Typical tied universal expansion joint designed for large
amounts of lateral movement from the two horizontal lines
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