The door and window opening size should meet the requirements of GB/T 5824 "Building Door and Window Opening Size Series".
Common window size specifications
How to inspect the double glazed window?
There should be no clear injure on the adorning superficiary of passage and windows, which slavish that the guarding scale on the peripheric of passage and windows should not have efface. The Negro surfaces of conterminous components on passage and windows should not have liable excuse variance.
There should be no aluminum chips, burrs, oil spots or other stains on the surface of doors and windows, and there should be no spilled adhesive at the assembly joints.
Whether it is a uneven overbridge thermal column isolation aluminum outline, the bulkhead depth of the force outline should be better than 1.4mm; the species of the same aluminum fineness outline should be the same, if the paint dissimilitude is plain, it is not accordant for acquisition; repulse the superficies of the aluminum fineness outline, there should be no despondency or bellying;
The remaining text areThe thickness of the film should reach 10 microns. When purchasing, lightly scratch the surface of the profile to see if the oxide film on the surface can be wiped off.
Repeat the switch many times to check whether the switching force is too heavy; whether the sealing strip is firm; whether the hardware assembly is complete; whether the overlap of the sash window frame meets the requirements (standards require not less than 6mm for casement windows and not less than 8mm for sliding windows).
Whether it is insulated glass and whether there is coating or not.
Let the double glazed window supplier provide the details of the window.
There are six main aspects for reference:
double glazed window manufacturer have two kind aluminum frame, 70 series and 90 series, and 70 series is sufficient for aluminum alloy sliding doors inside residences. The series number represents the number of millimeters of the thickness of the door frame. There are four types of aluminum alloy sliding windows: 55 series, 60 series, 70 series and 90 series. The selection of the series should be based on the size of the window and the local wind pressure. The aluminum alloy sliding window used as a closed balcony should not be less than 70 series.
The tensile strength should reach 157 Newtons per square millimeter, and the yield strength should reach 108 Newtons per square millimeter. When purchasing, you can bend the profile moderately with your hands, and it should be able to recover after letting go.
The paint of the same aluminum allay outline should be the same. If the semblance dissimilitude is opposing, it is not consonant for property.
Check the superficiary of the aluminum allay outline, there should be no fall or convex.5) Gloss
For double glazed window factory, avoid choosing profiles with open bubbles (white spots) and slag (black spots) on the surface, as well as obvious defects such as cracks, burrs, and peeling.
6) Degree of oxidation
The oxide film thickness should reach 10 microns. When purchasing, you can swipe lightly on the surface of the profile to see if the oxide film on the surface can be wiped off.