Basic Requirements for Glass Used in Doors and Windows
(1) The edges of glass used for doors and windows should be ground and chamfered.
(2) For tempered glass and tempered insulating glass used in system windows, the thickness of any single piece of glass should preferably not be less than 5mm.
(3) When using insulating glass, in addition to meeting the relevant provisions of the current national standard "Insulating Glass" (GB/T 11944), the following provisions should also be complied with.
① The thickness of the gas layer in the insulating glass should not be less than 9mm.
② Insulating glass should adopt double - seal. The primary seal should use butyl hot - melt sealant, and the secondary seal should use polysulfide insulating glass sealant or silicone sealant.
For insulating glass used in hidden - frame and semi - hidden - frame doors and windows, the secondary seal should use silicone structural sealant. The secondary seal of insulating glass should be mixed and sealed using a gluing machine.
③ The spacer aluminum frame of insulating glass can be of continuous - bending type or corner - inserting type. Hot - melt spacer strips should not be used. The desiccant in the spacer aluminum frame should preferably be filled by special equipment.
④ During the processing of insulating glass, corresponding measures should be taken to eliminate the concave - convex phenomena that may occur on the glass surface.
(4) When laminated glass is used for doors and windows, the interlayer film should preferably be polyvinyl butyral film or ionic intermediate - layer film. The exposed edges of polyvinyl butyral laminated glass should be edge - sealed.
(5) When single - piece low - emissivity coated glass is used for doors and windows, online thermal - spraying low - emissivity coated glass should be used. Off - line coated low - emissivity coated glass should preferably be processed into insulating glass, and the coated surface should face the gas layer of the insulating glass.
(6) For glass with fire - protection requirements, corresponding fire - resistant glass and its products should be adopted according to the fire - protection grade requirements.
