The standard "GB/T 31433-2015 General Technical Conditions for Building Curtain Walls, Doors and Windows" stipulates the performance classification, selection requirements and test methods of building curtain walls and doors and windows. It is applicable to curtain walls and doors and windows in civil buildings, but does not include some special doors and windows, such as fire doors and windows and anti-ray Shielding doors and windows. The standard covers the requirements of performance classification, air tightness, water tightness, wind pressure resistance, thermal insulation performance, sound insulation performance, etc., and lists relevant test methods. Through this standard, the performance Stability and safety of building curtain walls and doors and windows in different environments can be ensured.