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

        Skill requirements for fireproof glass

        2021-06-24 3133

        The fire-resistant function of fire-proof glass for construction is obtained by embedding the fire-proof glass directly in the wall hole or combined with the structure, and then embedded in the wall hole to make components according to gbl2513. It includes the determination of fire-resistant integrity, fire-resistant and heat insulation and thermal radiation intensity. The temperature of the thermal insulation surface is used as the criterion.

        防火玻璃

        According to gb15763 1-2009 (according to the rules of safety glass and fire-proof glass for construction), fire-proof glass for construction is divided into class A (fire-proof glass satisfying the requirements of fire integrity and fire insulation) and class C (fire-proof glass satisfying the requirements of fire integrity). According to the fire resistance rating, the three types of fireproof glass can be divided into grade I (≥ 90min), grade II (≥ 60min), grade III (≥ 45min) and grade IV (≥ 30min). Fire resistance integrity -- refers to the flame on the back fire surface of the test piece and continues to burn for 10s or more; During the experiment, when the flame or gas of the test piece appears from the holes and other gaps, the ignition test of the cotton pad shall be carried out. If the cotton pad is ignited, it indicates that the test piece has lost its integrity (if the test piece collapses during the experiment, the manufacturer of the raw material of the fire-proof liquid is the same, it indicates that the test piece has lost its integrity).

        Fire resistance and thermal insulation -- refers to the temperature rise of single point at the temperature measuring point on the back fire surface of the test piece of 180 ℃ and uniform temperature rise of 140 ℃.

        Article source: fireproof glasshttp://www.wan-xin.net/


        主站蜘蛛池模板: 国产三级自拍视频在线| 久久国产A∨一二三| 溆浦县| 一区二区三无码| 色婷婷一区二区三区四区| 聂荣县| 天堂av一区二区在线观看| 国产av一区二区三区丝袜| 亚洲免费日韩一区二区| 曰韩久久精品中文字幕| 一区二区三区国产在线网站视频 | 久久精品黄色免费热线| 一本加勒比hezyo无码视频| 精品国产亚洲一品二品| 青青草99久久精品国产综合 | 东京热加勒比在线观看| 婷婷五月亚洲综合图区| 二区三区国产在线观看| 亚洲精品一区二区三区av| 兴和县| 云梦县| 荥阳市| 国产粉嫩嫩00在线正在播放| 国产精品一区成人亚洲| 久久亚洲国产精品一区| 粉嫩小泬无遮挡久久久久久| 无码高潮久久一级一级喷水| 国产精品nv在线观看| 宁武县| 芮城县| 熟女丝袜美腿亚洲一区二区三区| 章丘市| 娄烦县| 日韩精品人妻一区二区在线看| 安西县| 威远县| 九江县| 亚洲区精品久久一区二区三区女同| 苏州市| 亚洲一区二区三区免费av在线| 精品午夜一区二区三区|