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Manufacturing Process Material Standard Grades Size Range (mm) Thickness Range (mm) Standard Length (mm) Standard Finishes Manufacture Specification
Spiral Welded Tube and Pipe Stainless 304L
316L
4003
76 to 1524 OD 1.2 to 5.0mm 6000* Cold & Hot Roll Roladuct
Tig welded
Mild Steel G250
G275
76 to 1524 OD 1.2 to 6.0mm 6000* Cold & Hot Roll
Galvabond
Roladuct MIG and TIG welded
Spiral Lockseam Ducting Systems Mild Steel
Stainless
Aluminium
Gal
Galvabond
Colorbond
304L
316L
Aluminium as specified
Standard
75 to 3000
Insulated
75 to 3000
Oval
500 x 150 to 1950 x 700mm
0.5 to 3.0mm As nominated
Oval Max 3.5m
Cold & Hot Roll
Galvabond
Colorbond
Helical 4 ply pittsburg locked seam
Fabricated Fittings
Bends, Tees, Reducers, Transitions,
Butt weld
Flanged
Mild Steel
Stainless
Galvanized
As for tube and pipe To match tube and pipe 0.5 to 5.0mm As nominated Cold & Hot Roll
Galvabond
Roladuct or as specified