专注通风管道加工·排烟罩

一、 管道耐火限度要求

1、 Fire resistance limit requirements for pipelines

1.机械加压送风管道的设置和耐火限度应符合下列规定：

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

1 竖向设置的送风管道应独立设置在管道井内，当确有困难时，未设置在管道井内或与其他管道合用管道井的送风管道，其耐火限度不应低于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 水平设置的送风管道，当设置在吊顶内时，其耐火限度不应低于0.50h；当未设置在吊顶内时，其耐火限度不应低于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、 排烟管道的设置和耐火限度应符合下列规定：

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

1竖向设置的排烟管道应设置在独立的管道井内，排烟管道的耐火限度不应低于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 水平设置的排烟管道应设置在吊顶内，其耐火限度不应低于0.50h；当确有困难时，可直接设置在室内，但管道的耐火限度不应小于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 设置在走道部位吊顶内的排烟管道，以及穿越防火分区的排烟管道，其管道的耐火限度不应小于1.00h，但设备用房和汽车库的排烟管道耐火限度可不低于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.补风管道耐火限度不应低于0.50h，当补风管道跨越防火分区时，管道的耐火限度不应小于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、管道隔热要求

3、 Pipeline insulation requirements

1.当吊顶内有可燃物时，吊顶内的排烟管道应采用不燃材料进行隔热，并应与可燃物保持不小于150mm的距离。

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.

条文说明为了防止排烟管道本身的高温引燃吊顶中的可燃物，本条规定安装在吊顶内的排烟风管应采取隔热措施，如在排烟风管外，包敷具有耐火限度的材料，并与可燃物保持不小于150mm的距离。

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.

金属风管的制作和连接应符合下列规定：

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

排烟风管的隔热层应采用厚度不小于40mm的不燃绝热材料，绝热材料的施工及风管加固、导流片的设置应按现行******标准《通风与空调工程施工质量验收规范》GB50243的有关规定执行。

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.

风管的安装应符合下列规定：

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

吊顶内的排烟管道应采用不燃材料隔热，并应与可燃物保持不小于150mm的距离。

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、由上述规定可知，当排烟管道设置在吊顶内且有可燃物时，应同时满足耐火极 限和不小于40mm隔热层要求。

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、耐火极 限其实已经包括了耐火隔热性，又规定了不小于40mm隔热层，是进一步提出更高要求，故二者都应满足，现实应用中经常被忽略。

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.

不适用于：

Not applicable to:

a）耐火性能取决于吊顶耐火性能的管道；

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

b）带检修门的管道，除非将检修门纳入到管道中一起试验；

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

c）两面或三面的管道；

c) Two or three sided pipes;

d）排烟管道；

d) Smoke exhaust duct;

e）与墙或楼板连接的吊挂固定件。

e) Hanging fixtures connected to walls or floors.

本文由济南排烟罩友情奉献.更多有关的知识请点击:http://www.jnqsg.com真诚的态度.为您提供为的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

This article is a friendly contribution from Jinan smoke exhaust hood. For more related knowledge, please click: http://www.jnqsg.com Sincere attitude. We will provide you with comprehensive service. We will gradually contribute more relevant knowledge to everyone. Stay tuned

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