[China Aluminum Network] Substandard aluminum alloy doors and windows, due to the impact of sunlight, air, rain, etc., will cause the deformation of aluminum profiles, and even cause the glass to crack and fall off. Inferior aluminum profiles have the following four characteristics:
△ oxide film thickness. The national standard specifies that the thickness of the aluminum oxide film in the building shall not be less than 10 μm. The thickness is not enough. The surface of aluminum profiles is rusted and corroded. Sampling inspection of some no name, site, production license, certification of aluminum profiles, the oxide film thickness is only 2 to 4um, and some even without oxide film. According to experts' estimates, the thickness of the oxide film can be reduced by more than 150 yuan per ton of material for each ton of material.
â–³ chemical composition is not qualified. The introduction of a large amount of aluminum and aluminum scrap aluminum can greatly reduce the cost, but will lead to the failure of the chemical composition of aluminum profiles, seriously jeopardizing the safety of construction projects.
â–³ Decrease the wall thickness of the profile. 90 series sliding window type, according to national standards, the wall thickness of aluminum profiles is not less than 1.4mm, and some Guangdong products are only 0.6 to 0.7mm. 46 series of floor-ejection type, the national standard for the use of aluminum wall thickness is not less than 1.62mm, sampling, Guangdong some of the products only 0.97 to 1.18mm.
â–³Inferior aluminum profiles reduce the sealing time significantly, reduce the loss of chemical reagents, and reduce the cost, but the corrosion resistance of profiles is also greatly reduced.
Mechanical Parts Package Of Cargo Elevator
Mechanical Parts Package Cargo Elevator, Mechanical Parts Package Freight Elevator, Mechanical Parts Package Goods Elevator
OTIS Mechanical Parts Package Of Complete Cargo Elevator, Thyssen Mechanical Parts Package Of Complete Cargo Elevator, KONE Mechanical Parts Package Of Complete Cargo Elevator, GiantKONE Mechanical Parts Package Of Complete Cargo Elevator, ThyssenKrupp Mechanical Parts Package Of Complete Cargo Elevator, Schindler Mechanical Parts Package Of Complete Cargo Elevator, XJ Schindler Mechanical Parts Package Of Complete Cargo Elevator, Xizi OTIS Mechanical Parts Package Of Complete Cargo Elevator, Mitsubishi Mechanical Parts Package Of Complete Cargo Elevator, Shanghai Mitsubishi Mechanical Parts Package Of Complete Cargo Elevator, Fujitec Mechanical Parts Package Of Complete Cargo Elevator, Hitachi Mechanical Parts Package Of Complete Cargo Elevator, Toshiba Mechanical Parts Package Of Complete Cargo Elevator, Hyundai Mechanical Parts Package Of Complete Cargo Elevator, LG Mechanical Parts Package Of Complete Cargo Elevator, Sigma Mechanical Parts Package Of Complete Cargo Elevator, Express Mechanical Parts Package Of Complete Cargo Elevator, GUANGRI Mechanical Parts Package Of Complete Cargo Elevator, FUJI Mechanical Parts Package Of Complete Cargo Elevator, BLT Mechanical Parts Package Of Complete Cargo Elevator, CANNY Mechanical Parts Package Of Complete Cargo Elevator, SJEC Mechanical Parts Package Of Complete Cargo Elevator, KOYO Mechanical Parts Package Of Complete Cargo Elevator, IFE Mechanical Parts Package Of Complete Cargo Elevator
Mechanical Parts Package Cargo Elevator, Mechanical Parts Package Freight Elevator, Mechanical Parts Package Goods Elevator
CEP Elevator Products ( China ) Co., Ltd. , https://www.zjsmartcommercialescalators.com