Stainless steel sheet approach to provide any proof of quality documents
There are many types of curtain walls, such as glass curtain wall, dry hanging stone curtain wall, aluminum-plastic curtain wall, etc., which there are a number of detailed classification, I have some information on hand, I do not know which corresponds to your needs, please add specific requirements
The simplest is the material certificate slightly, generally large steel mills are made of stainless steel material certificate. If your product needs environmentally friendly, then the use of stainless steel on the need for environmental certification, like ROSH certification.
