Ducts "Plain"

Plain Ducts (without Flanges or turned out Edge)

Straight ducts without flanges or turned out edges (Vanstone)
Diameters from 80 to 160 mm
Assembly with MUX Overcollars
Straight ducts longer than 2000 mm upon request

Duct diameters from 224 up to 1000 mm are also available.
These can be connected with the "METU-SYSTEM Round Connections".
These connections are not liquid or oil tight.

Ø 180 mm not available yet.
Ø 80 up to 180 mm in stainless steel not available yet.

Why not use laser-welded ducts instead of
spiral ducts as standard?
Herewith a few arguments.

Product Specifications for Tender Texts

Straight "Plain" Ducts. Liquid and oil-tight laser-welded METU-FORM straight ducts made of galvanized steel (stainless steel V2A / 1,4301 / 304 not available yet) with smooth inner surfaces and no flanges on both ends ("Plain" execution). Connection with Overcollars MUX. Diameters from 80 up to 200 mm. The air-tightness exceeds the highest-class D according to the norm DIN EN 12237. Tightness class ATC 1 (EN 16798-3). No ATEX / EX certifications.



STP Format


Round duct stocking accessory


Straight "plain" ducts (Plain = without flanges)