-––
[
RECTANGULAR METAL
DUCT EXPANSION JOINTS ]
–-–
Corspan
ROUND CORNER-FOR BEST FATIGUE CAMERA CORNER –
PERFORMANCE AND BEST VALUE NOT RECOMMENDED
Corspan recommends the round corner design for all Corspan does not recommend the use of camera corner
applications. This design results in the lowest corner construction for rectangular metal expansion joints of any
stress if fit up and welding of the corner seams are convolution profile. This is a method of assembly that
carefully controlled. allows all corner seam welding to be performed on the
outside of the corner in a very accessible area with welders
of lower skill level than would be required for a single
miter corner. However, this style corner results in deep
crevices at the corner that are corrosion initiators in
certain flue gas conditions. The design also results in
a reduction in movement capability.
SINGLE MITER CORNER –
CONVENTIONAL DESIGN
Corspan also recommends the single miter design
for corner construction. If a corner preference is not
specified, Corspan will use the single miter design for all
convolution profiles for lowest cost. This design allows
for maximum amount of motion possible for a given
convolution profile. The corner is a simple “picture
frame” construction.
DOUBLE MITER CORNER –
VALUE ADDED –
LOW CORNER FATIGUE
Flexon
®
is a registered trademark of Senior Flexonics Pathway
Corspan
®
is a registered trademark of Senior Flexonics Pathway
The double miter corner design offers lower corner
Ultrachem
®
is a registered trademark of Senior Flexonics Pathway
fatigue than the conventional single miter corner or
Inconel
®
is a registered trademark of Inco Alloys
camera corner designs. Welds are positioned away from Viton
®
is a registered trademark of E.I. Dupont
the centerline of the corner and the highest stressed area
Fluorel
®
is a registered trademark of 3M
of the bellows.
Teflon
®
is a registered trademark of E.I. Dupont
29
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