这些区域建立在正常操作中，在空气中的可燃粉尘云发生时间的差异。
These zones establish the differences in the periods of occurrence of a cloud of combustible dust in the air during normal operations.
叙述了可燃粉尘火灾爆炸的原理，并详细描述了粉尘爆炸的预防和消防措施。
This paper introduces the theory of flammable dust fire and explosion accident, and describes prevention measures of dust explosion accidents and their fire fighting measures.
介绍了可燃粉尘极限氧含量的测试方法和测试设备，并给出了几种常见可燃粉尘的极限氧含量。
The measurement and test apparatus of limiting oxygen concentration (LOC) of combustible dusts were introduced with the LOC of some conventional combustible dusts given.
同时，静电放电产生的火花能引燃袋式除尘器中的可燃粉尘，当粉尘浓度达到一定界线时还可能发生爆炸。
At the same time, electrostatic discharge generated sparks can ignite flammable in the bag filter dust, dust concentration reaches a certain line when the explosion may occur.
当这些工厂企业使用普通搬运设备在可燃性的液体、气体或粉尘存在的环境下进行工业生产时，风险很大。
When the factories use normal handling equipments to work in an environment with existence of flammable liquid, gas or dust, they have high risks.
适用于可燃性粉尘环境。
有可燃性粉尘场合用电气设备。第0部分：一般要求。
Electrical apparatus for use in the presence of combustible dust - Part 0: General requirements.
生产者气体离开作为可燃和非alongwith cobustible气体的混合物气化炉焦油蒸气，水蒸汽，粉尘，矿物蒸汽。
Producer gas leaves the gasifier as the mixture of combustible and non-cobustible gases alongwith tar vapour, water vapour, dust, mineral vapour.
适用于可燃性粉尘场所。
如果不能保证排除可燃性粉尘堆积或粉尘层时，则应划分为21区。
Where, following an abnormal condition, the removal of dust accumulations or layers cannot be assured, then the area is to be classified zone 21.
很多常见的可燃物质在以粉尘状态出现的情况下是可以爆炸的，例如金属、木材、煤。面粉、糖、塑料和其它的化学品和药品。
A wide range of common combustible materials can explode in finely powdered form, including metals, wood, coal, flour, sugar, plastics, and many chemicals and pharmaceuticals.
金属粉尘的燃烧产生更多的热和辐射，有些金属粉尘的燃烧火焰的温度非常高，远高于其他可燃物质。
Metal dust fires have the potential to radiate more heat and some metals burn at extremely high temperatures in comparison to other combustible materials.
粉尘防爆照明应急两用灯，21区，22区危险场所。 含有爆炸性或可燃性粉尘环境。
Can be used in Zone 20 zone 21 and Zone 22 dangerous places. Can be used in explosive or flammable dust atmosphere.
粉尘防爆照明应急两用灯，21区，22区危险场所。 含有爆炸性或可燃性粉尘环境。
Can be used in Zone 20 zone 21 and Zone 22 dangerous places. Can be used in explosive or flammable dust atmosphere.
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