Construction Specifications
The document outlines the construction specifications for ducts, focusing on longitudinal seam types which can be either laser welded or lockformed. The ends of the ducts feature a Quick-Fit (QF) rolled edge design.

Temperature Rating of Product Components
The temperature ratings for various components are specified as follows:

• QF/QFS Duct Sealants: 593°C
• 304 Stainless Steel: 200°C
• Galvanised Steel: 121°C
• Joka Seal Metal Sealant: 2315-20°C

Compliance and Material Ratings
The document provides compliance and material ratings for different components:

• QF/QFS Duct Galvanised: DX51D with Z275 Coating
• QF/QFS Duct 304SS: 304 Stainless Steel EN.1.4301/TP. 304
• Joka Seal Metal Sealant: Acetone blend AAMA Specification 801.1

Additional Notes
It is noted that at temperatures between 200°C and 250°C, the zinc-iron alloy layers in galvanised steel offer high corrosion protection, though some peeling and changes in mechanical properties may occur. The recommended maximum service temperature is 200°C.

Technical Data
The document includes detailed technical data for ducts, specifying dimensions, weights, and steel thickness for both laser welded and lockformed seams. Key data points include:

• Diameter (Ø), Outer Diameter (O/D), Inner Diameter (I/D)
• Rolled Edge nominal measurements
• Lengths and weights for 2m, 1.5m, and 1m duct sections
• Steel thickness ranging from 0.7mm to 0.9mm