美国黄色片一区二区三区,欧美韩日亚洲影视在线视频,国产人妻大战黑人20p,免费无码又爽又刺激高潮的视频免费 ,国产在线丝袜精品一区免费,国禁国产you女视频网站,少女たちよ在线观看动漫4,免费啪啪视频一区

        What are the differences between fireproof glass doors and steel fireproof doors

        2019-11-25 2157

        Fireproof glass doors are made of fireproof glass, while steel fireproof doors are made of steel and fireproof materials. The materials used are different,

        Advantages of steel fire doors:

        The steel fireproof door is made of good cold-rolled steel plate or galvanized plate, color plate, stainless steel plate, etc., which is formed by cold processing (shearing, stamping, bending, etc.), then treated by pickling and phosphating, and then assembled by welding, internal biting, riveting, gluing and other processes.

        The door frame is inlaid with fireproof expansion sealant strip, and the door surface is sprayed with fireproof paint and antirust paint. The door surface can also be sprayed with plastic and wood grain transfer according to the needs of users. The hardware shall be fireproof lock, fireproof door closer, fireproof hinge, handle, bolt and sequencer, and the corresponding grade of fireproof glass can also be equipped according to the needs of users. The performance of steel fire doors meets the requirements of national standards. The fire resistance time of fire doors is 1.2h, and that of class B fire doors is 0.9h. The size standard can be customized according to the customer's needs.

        Advantages of glass fire doors:

        1. Superior fire resistance

        As we all know, the reason why the fireproof glass door can prevent fire must be that the glass door material has fire resistance. Good fireproof glass can still keep it from bursting for more than 90 minutes under the impact of fire up to 1000 ℃, which has won a valuable moment for people's escape and disaster relief work.

        2. High strength

        防火玻璃門

        A fireproof glass door should not only have fire resistance, but also have high strength. For example, under the same glass thickness, the strength of fireproof glass is 6-12 times that of fluorinated glass and 2-3 times that of tempered glass.

        3. Safety

        In a fire, it is important that the fragments of good fireproof glass are in an obtuse angle after being broken, and its fragments are smaller than those of tempered glass, that is to say, even if it is broken, it will not cause harm to human body.

        4. High weather resistance

        Compared with the traditional grouting or composite sandwich fire-proof glass, the fire-proof glass has not only high light intensity, but also high weather resistance. Under the long-time irradiation of ultraviolet light, it will not have any change affecting the appearance and service performance, so it can keep transparent and bright for a long time.

        Article source: fireproof glass door http://www.wan-xin.net/


        主站蜘蛛池模板: 日产乱码一区二区国产内射| 国产成人精品男人的天堂网站| 中卫市| 激情亚洲综合熟女婷婷| 日本中文字幕一区二区视频| 六安市| 亚洲精品天堂av免费看| 精品久久精品午夜精品久久| 中文字幕一区二区三区日韩网 | 河北区| 安宁市| 成人免费观看在线播放视频| 日本午夜理伦三级好看| 亚洲人成网站www| 免费无码黄网站在线观看| 囯产精品无码一区二区三区AV| 亚洲午夜久久久久中文字幕久| 宜丰县| 镇雄县| 枣阳市| 双城市| 巫山县| 铜梁县| 阳原县| 欧洲AV秘 无码一区二区三| 南昌市| 中字亚洲国产精品一区二区| 大田县| 开鲁县| 亚洲av色香蕉一区二区蜜桃| 日本一级淫片免费啪啪| 中文熟女av一区二区| 国产精品黄色片在线观看| 国产码欧美日韩高清综合一区| 国内精品久久久久久久亚洲| 国产福利一区二区三区视频在线看| av亚洲在线一区二区| 人妻少妇精品一区二区三区| 杨幂国产精品一区二区| 国产成人久久精品流白浆| 成年毛片18成年毛片|