亚洲精品鲁一鲁一区二区三区-最爽无遮挡行房视频-强壮的公次次弄得我高潮A片日本-精品人妻无码一区二区三区换脸-中文字幕亚韩-亚洲国产精品一区二区第一页-丰满岳乱妇一区二区三区-大陆极品少妇内射AAAAAA-国产乱人伦AV麻豆网-AV国産精品毛片一区二区三区-午夜精品视频在线无码-免费精品一区二区三区A片在线-在线天堂无限次观看,亚洲日韩无码一区二区,中文字幕乱人伦视频在线,亚洲欧美熟妇综合久久久久久,少妇无码一区二区三区免费久久,欧美黑人一级片在线观看,久久久精品无码一区三区,国产视频在线观看蜜芽,大香蕉五月婷婷精品视频 ,久草精品在线,国产无码在线播放一区二区,囯产无码交换大片在线播放,八戒八戒在线高清观看视频 ,娇妻被又粗又长又猛玩,国产曰肥老太婆无遮挡,国产剧情黄色,国产成年无码久久久久毛片資訊,大香蕉太香蕉成人现现,逼逼爱爱爱无码免费观看,亚州色图欧美图片自偷自拍,碰碰视频麻豆,午夜一本,一起射综合影院,黑人干熟女,欧洲高清转码区一二区 ,国产高清视频色拍,粉嫩无码小泬无套在线观看,大香蕉在线网站,成人做爰理论片,成人漫,9l视频自拍九色9l成人

1. Fire resistance limit of air duct specified in Technical Standard for Building Smoke Control and Smoke Extraction System:

（1）排煙風管

(1) Smoke exhaust duct

（2）消防通風管道安裝加壓送風風管

(2) Installation of pressurized air supply duct for fire ventilation duct

（3）送風風管

(3) Air supply duct

2、《建筑設計防火規范》對風管耐火極限的規定：

2. Fire resistance limit of air duct specified in Code for Fire Protection Design of Buildings:

風管越過耐火極限、樓板和防火墻時，穿越處風管里的排煙防火閥、防火閥兩邊各2.0m范圍里的風管應采用防火風管或風管表面應采用防火保障措施，且耐火極限不可小于該防火分隔體的耐火極限。

When the air duct crosses the fire resistance limit, floor slab and firewall, the smoke exhaust fire damper in the air duct at the crossing and the air duct within 2.0m on both sides of the fire damper shall adopt fire resistant air duct or the air duct surface shall adopt fire protection measures, and the fire resistance limit shall not be less than the fire resistance limit of the fire compartment.

（一般狀況，耐火極限耐火極限2.0h；樓板耐火極限1.5h；防火墻耐火極限3.0h。）

(In general, the fire endurance is 2.0h; the fire endurance of floor slab is 1.5h; the fire endurance of firewall is 3.0h.)

3、《建筑防煙排煙系統技術標準》對風管隔熱的規定：

3. The Technical Standard for Building Smoke Control and Smoke Exhaust System specifies the thermal insulation of air duct:

當吊頂內有可燃物時，吊頂里的排煙管道應選用不燃材料開展隔熱，并應與可燃物維持不小于150mm的間距。

When there are combustibles in the ceiling, the smoke exhaust pipe in the ceiling shall be insulated with incombustible materials, and the distance between the pipe and the combustibles shall not be less than 150mm.

注：排煙風管設定隔熱的目的是避免高溫煙塵點燃吊頂里的可燃物。車庫無吊頂，且都是機電管道，無可燃物，從隔熱規定來看，車庫排煙風管無需設定隔熱對策。當吊頂內無可燃物時，也無需設定隔熱對策。

Note: The purpose of setting thermal insulation for smoke exhaust duct is to prevent high-temperature smoke and dust from igniting combustibles in the ceiling. The garage has no suspended ceiling, and is all mechanical and electrical pipes, free of combustibles. From the perspective of thermal insulation regulations, the garage smoke exhaust duct does not need to set thermal insulation measures. When there are no combustibles in the ceiling, there is no need to set thermal insulation measures.

螺旋通風管道廠家隔熱和耐火極限是兩個不同的概念！

Thermal insulation and fire resistance limit of spiral ventilation duct are two different concepts!

4、耐火極限定義

4. Definition of fire endurance

在規范防火試驗條件下，建筑構件、配件或構造從受到火的作用時起，至喪失承載力、完整性或隔熱性時止常用的時間，用小時表示。

Under the specified fire test conditions, the common time from the time when building components, fittings or structures are exposed to fire to the time when they lose their bearing capacity, integrity or thermal insulation is expressed in hours.

通風管道加工安裝的耐火極限包含風管的防火完整性和風管的防火隔熱性，二者必須同時滿足。與結構梁、柱子、承重梁不同的是，風管無需滿足防火承載力。

The fire endurance of the processing and installation of the ventilation duct includes the fire integrity of the air duct and the fire insulation of the air duct, both of which must be met at the same time. Unlike structural beams, columns and load-bearing beams, air ducts do not need to meet the fire resistance bearing capacity.

以上就是為大家介紹的有關濟南通風管道的詳細的介紹,希望對您有所幫助.如果您有什么疑問的話,歡迎聯系我們.我們將以的態度,為您提供服務http://m.wxcdx.com

The above is a detailed introduction to the ventilation pipes in Jinan. I hope it will be helpful to you. If you have any questions, please contact us. We will provide services for you with our attitude http://m.wxcdx.com