Quality appraisal of metal doors and windows

Metal doors and windows refer to building doors and windows made of metal materials (aluminum alloy or other metals). Metal doors and windows are mainly used in the real estate and building decoration industries.
metal doors and windows have strong corrosion resistance, good sealing, high safety, and strong wind resistance. Metal door and window materials are heavier, which increases installation complexity, but also increases safety. In addition, the cost of metal doors and windows is low and they are very suitable for large-scale use.
In metal door and window quality appraisal cases, Zhongke Testing can provide metal door and window quality appraisal services.

metal door:
1) divided by material: steel door, aluminum alloy door, rolling shutter door;
2) divided by function, including fire door, security door; and metal door frame.
metal windows:
steel windows, aluminum alloy windows, blinds and window frames are similar to metal products. Similar products of
metal doors and windows:
metal fence doors, metal railings, metal fences and railings, fire ladders and other similar metal products.

GB/T 20909-2017 Steel doors and windows
GB/T 29734-2013 Energy-saving doors and windows for construction
GB/T 8478-2020 Aluminum alloy doors and windows
GB/T 39524-2020 Test method for weather resistance performance of building doors and windows
GB/T 32223-2015 General requirements for building door and window hardware
GB/T 9158-2015 Testing method for mechanical properties of building doors and windows
JG/T 543-2018 Aluminum-plastic co-extruded doors and windows
JG/T 115-2018 Steel door and window profiles for construction

quality product dispute situation:
According to the information provided by the client, from 2015 to 2018, due to house construction needs, the demander ordered metal doors and windows from the supplier many times. The demander believes that the customized results delivered by the supplier do not meet the requirements agreed by both parties and have serious quality problems. The supplier believes that its custom-made metal doors and windows have no quality problems. In order to find out the facts, the buyer proposed to identify whether the "stainless steel rose gold doors" (two doors) involved in the case were entirely made of SUS304 (S30408) stainless steel.
quality analysis results:
" The appraisal expert group discussed and comprehensively analyzed the relevant information, on-site investigation and inspection results and product testing results of the "stainless steel rose gold door" involved in the case, and made the following appraisal opinions:
The "stainless steel rose gold door" (two doors) involved in the case is not entirely made of SUS304 (S30408) stainless steel material.