一、 管道(dao)耐火限度要求

1、 Fire resistance limit requirements for pipelines

1.機(ji)械加(jia)壓送風管道的設置和(he)耐火(huo)限度應符(fu)合下列規定：

The setting and fire resistance limit of mechanical pressurized air supply pipelines should comply with the following regulations:

1 豎向設置的(de)送風管(guan)道(dao)應獨(du)立(li)設置在管(guan)道(dao)井(jing)(jing)內(nei)，當確有(you)困(kun)難時，未設置在管(guan)道(dao)井(jing)(jing)內(nei)或與其他管(guan)道(dao)合用管(guan)道(dao)井(jing)(jing)的(de)送風管(guan)道(dao)，其耐火限度不(bu)應低于(yu)1.00h；

1. Vertical air supply pipelines should be independently installed in the pipeline shaft. When there are difficulties, the fire resistance limit of air supply pipelines that are not installed in the pipeline shaft or used together with other pipelines in the pipeline shaft should not be less than 1.00 hours;

2 水平設(she)置(zhi)的(de)送風(feng)管(guan)道，當(dang)設(she)置(zhi)在吊(diao)頂內時，其耐火(huo)限(xian)(xian)度不應(ying)低(di)于0.50h；當(dang)未設(she)置(zhi)在吊(diao)頂內時，其耐火(huo)限(xian)(xian)度不應(ying)低(di)于1.00h。

The fire resistance limit of the air supply duct installed horizontally in the ceiling should not be less than 0.50 hours; When not installed inside the ceiling, its fire resistance limit should not be less than 1.00 hours.

二、 排煙管(guan)道(dao)的(de)設置(zhi)和耐火限度應符合下列規定：

2、 The setting and fire resistance limit of smoke exhaust pipes should comply with the following regulations:

1豎向設置的(de)排煙管道(dao)應設置在獨立的(de)管道(dao)井(jing)內，排煙管道(dao)的(de)耐火(huo)限度不應低于0.50h。

Vertical smoke exhaust pipes should be installed in independent ducts, and the fire resistance limit of the smoke exhaust pipes should not be less than 0.50 hours.

2 水(shui)平設(she)置(zhi)的(de)排(pai)煙管道(dao)應(ying)設(she)置(zhi)在吊頂(ding)內，其耐(nai)火限度(du)不應(ying)低于0.50h；當確有困難時，可直接設(she)置(zhi)在室內，但管道(dao)的(de)耐(nai)火限度(du)不應(ying)小(xiao)于1.00h。

2. Horizontal smoke exhaust pipes should be installed inside the ceiling, and their fire resistance limit should not be less than 0.50 hours; When there are difficulties, it can be directly installed indoors, but the fire resistance limit of the pipeline should not be less than 1.00 hours.

3 設(she)置在走道(dao)部位吊頂(ding)內的(de)排(pai)(pai)煙管道(dao)，以及(ji)穿越防火分(fen)區的(de)排(pai)(pai)煙管道(dao)，其(qi)管道(dao)的(de)耐火限度(du)不應小于1.00h，但設(she)備(bei)用(yong)房(fang)和汽(qi)車(che)庫的(de)排(pai)(pai)煙管道(dao)耐火限度(du)可不低(di)于0.50h。

The fire resistance limit of the smoke exhaust pipes installed in the suspended ceiling of the aisle and the smoke exhaust pipes passing through the fire compartment should not be less than 1.00 hours, but the fire resistance limit of the smoke exhaust pipes in the equipment room and garage may not be less than 0.50 hours.

3.補(bu)風(feng)管(guan)道(dao)耐火(huo)限度(du)不應(ying)低(di)于0.50h，當補(bu)風(feng)管(guan)道(dao)跨(kua)越防火(huo)分區(qu)時，管(guan)道(dao)的耐火(huo)限度(du)不應(ying)小于1.50h。

3. The fire resistance limit of the air supply pipeline should not be less than 0.50 hours. When the air supply pipeline crosses the fire compartment, the fire resistance limit of the pipeline should not be less than 1.50 hours.

三、管道隔熱要求

3、 Pipeline insulation requirements

1.當吊頂內(nei)有可(ke)燃(ran)物時，吊頂內(nei)的(de)排煙管道應采(cai)用(yong)不燃(ran)材料進行隔熱，并應與(yu)可(ke)燃(ran)物保持不小(xiao)于150mm的(de)距離。

When there is combustible material inside the ceiling, the smoke exhaust pipes inside the ceiling should be insulated with non combustible materials and kept at a distance of no less than 150mm from the combustible material.

條文說明為了防止排(pai)煙(yan)管道本身的(de)(de)(de)高(gao)溫(wen)引燃吊頂中的(de)(de)(de)可燃物，本條規定安裝在吊頂內的(de)(de)(de)排(pai)煙(yan)風(feng)管應采(cai)取隔(ge)熱措施(shi)，如在排(pai)煙(yan)風(feng)管外，包敷(fu)具有耐火限度的(de)(de)(de)材(cai)料，并與可燃物保持不小于150mm的(de)(de)(de)距離。

In order to prevent the high temperature of the smoke exhaust duct itself from igniting combustibles in the ceiling, this provision stipulates that smoke exhaust ducts installed in the ceiling should take insulation measures. For example, materials with fire resistance limits should be wrapped outside the smoke exhaust ducts and kept at a distance of no less than 150mm from combustibles.

金屬風管的制(zhi)作(zuo)和連接(jie)應符(fu)合(he)下(xia)列規定：

The production and connection of metal air ducts should comply with the following regulations:

排煙風管的(de)隔熱(re)層(ceng)應(ying)采(cai)用厚度不小于(yu)40mm的(de)不燃絕熱(re)材(cai)(cai)料，絕熱(re)材(cai)(cai)料的(de)施工(gong)及風管加固(gu)、導流片(pian)的(de)設置應(ying)按現(xian)行(xing)******標(biao)準《通(tong)風與空調工(gong)程施工(gong)質(zhi)量驗收(shou)規(gui)范(fan)》GB50243的(de)有關(guan)規(gui)定執行(xing)。

The insulation layer of smoke exhaust ducts should use non combustible insulation materials with a thickness of no less than 40mm. The construction of insulation materials, reinforcement of ducts, and setting of guide vanes should be carried out in accordance with the relevant provisions of the current ****** standard "Code for Acceptance of Construction Quality of Ventilation and Air Conditioning Engineering" GB50243.

風管的安裝應符(fu)合下列規定：

The installation of air ducts should comply with the following regulations:

吊頂(ding)內的排煙管道應(ying)采用不燃材料隔熱，并應(ying)與可燃物保持不小于(yu)150mm的距離。

The smoke exhaust pipes inside the ceiling should be insulated with non combustible materials and kept at a distance of no less than 150mm from combustible materials.

四、分析

4、 Analysis

1、由(you)上述規定可(ke)知(zhi)，當(dang)排煙管道設置在吊頂(ding)內且(qie)有可(ke)燃(ran)物時(shi)，應同時(shi)滿足耐(nai)火極 限(xian)和不小于40mm隔熱層(ceng)要求。

1. According to the above regulations, when the smoke exhaust duct is installed inside the suspended ceiling and there is combustible material, it should meet both the fire resistance limit and the requirement of no less than 40mm insulation layer.

2、耐(nai)火極 限其實(shi)已經(jing)(jing)包括(kuo)了耐(nai)火隔熱性(xing)，又(you)規(gui)定了不小(xiao)于40mm隔熱層，是進一步(bu)提(ti)出更(geng)高要求，故二者都應(ying)滿足，現實(shi)應(ying)用中經(jing)(jing)常被(bei)忽略(lve)。

2. The fire resistance limit actually includes fire resistance and thermal insulation, and specifies a thermal insulation layer of no less than 40mm, which is a further higher requirement. Therefore, both should be met, which is often ignored in practical applications.

不適用于：

Not applicable to:

a）耐(nai)火(huo)性能(neng)取決(jue)于吊頂耐(nai)火(huo)性能(neng)的(de)管道(dao)；

a) The fire resistance performance of the pipeline depends on the fire resistance performance of the ceiling;

b）帶檢(jian)(jian)修(xiu)門的管道，除非將(jiang)檢(jian)(jian)修(xiu)門納入到(dao)管道中一(yi)起試驗；

b) Pipes with access doors, unless the access door is included in the pipeline and tested together;

c）兩面或三面的管道(dao)；

c) Two or three sided pipes;

d）排煙管道；

d) Smoke exhaust duct;

e）與(yu)墻或(huo)樓板連接的(de)吊(diao)掛固定件(jian)。

e) Hanging fixtures connected to walls or floors.

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