| Characteristic |
Requirement of prEN13329 Ac3 |
Requirement of GB 18102-2007 |
| Thickness of element,t |
Δ taverage ≤0.5mm, on nominal value tmax-tmin ≤0.5mm |
The same |
| Length of the surface layer,l |
For the nominal values given, no measured value shall exceed: |≤1500: Δ|≤0.5mm |>1500mm: Δ|≤0.3mm/m |
Δ|≤1.0mm , Δ|≤2.0mm |
| Width of the surface layer, w |
Δ Waverage ≤0.1mm, on nominal value Wmax-Wmin ≤0.2mm |
The same |
| Squared of the element, q |
Δ | Δ Waverage ≤0.1mm, on nominal value | Wmax | Wmin ≤0.2mm, qmax ≤0.2mm |
No requrement |
| Straightness of the surface layer, s |
qmax ≤0.3mm/m |
The same |
| Flatness of the element, f |
Maximum single values: fw,concave ≤0.15% fw,convex ≤0.20% fi, concave ≤0.50% fi,convex ≤1.00% |
The same |
| Openings between element, o |
Oaverage ≤0.15mm , Omax ≤0.2mm |
The same |
| Height difference between elements, h |
haverage ≤0.1mm , hmax ≤0.15mm |
The same |
| Dimensional variations after changes in relative humidity, δ l, δ w |
δ laverage= δ waverage ≤0.9mm |
No requirement |
