Check the certificate:the inspection of ordinary fire windows will be stopped before they are sold,so you need to look at the specifications,dimensions and materials of the test samples,which are contrary to the actual purchase.When purchasing,the manufacturer shall obtain the type inspection report.

　　Process quality:good fireproof windows are better than ordinary manufacturing processes.The appearance should be incomplete without damage,and there are no traces of burrs on the surface.

　　Logarithm value:it depends on whether the tested sample description and the selected specifications are common.The thickness of fire-proof glass shall be the thickness of fire-proof glass in the sample description.

　　Look at the rating:fire windows are generally divided into three grades:A,B and C.***is poor,followed by grade B and grade C.***is only suitable for ordinary family fire protection.

　　Look at the sealing strip:qualified steel and wood fire doors shall be provided with fire sealing strips,which are flat and straight without arching,and have qualified inspection reports issued by the inspection organization

　　This article is from Luoyang Jinjia fireproof glass Co.,Ltd http://www.lyjjfhbl.com