热点项目当前所在位置 :山东十一运夺金 > 热点项目



According to 94/9/EC, a device that is to be used in an environment at risk of explosion may only be brought into the market if it satisfies the standards specified in the norm.

Compared with the previous directives, it must be noted that the specification refers not only to electrical but also to mechanical equipment (e.g. cylinders).

Devices are divided into categories and groups to accurately define the conditions of use. This definition is marked on the device and may appear as follows:

Example:


Device group

There are 2 groups of devices。

Devices of Group I, Category M are for use in underground mines and their above ground equipment, which are at risk from firedamp and/or inflammable dusts。 (This is not given further coverage in this document)。All other areas at risk of explosion are combined in Device Group II。

Identifier

EEx defines that this is an electrical device。

Ignition protection class

This defines which measures are used to ensure explosion protection。

The following ignition protection classes are used by AIRTEC:

m = Encapsulation, ia = Intrinsic safety, c = Safe by design

Other ignition protection classes are defined in EN 50014: 1997。 The abbreviations are currently under review discussion。

It should be noted that devices in ignition protection class ia may only be supplied from circuits that are certified to be intrinsically safe.

Explosion group

Device group II is sub-divided into Explosion Groups A, B or C.

This classification is dependent on the typical material properties of the gases and vapors that occur。

The hazard level of materials increases from Explosion Group IIA to IIC。 The requirements for the devices increase accordingly。 If a device is approved for IIC, it can be used for all other explosion groups。 Alternatively, the chemical formula or the name of the material can be stated here。

Temperature class



Category

The categories define which zones the devices may be used in. The classification states how frequently and in what concentration the ignitable mixture occurs. Furthermore, differentiation is made as to whether the hazard is due to gases, vapors and mists or due to dust.



Example of zone classification in gas Ex area.

Category 1

For devices, which guarantee a very high level of safety.

Intended for the case where an atmosphere at risk of explosion is to be expected frequently or continuously.

Devices in this category can also be used in Category 2 and 3。

Inflammable gases, vapors or mists

Zone 0 equivalent to Category 1G

Area in which an atmosphere at risk of explosion as a mixture of air and inflammable gases, vapors or mists is continuously or frequently present or present for long periods。

Inflammable dusts

Zone 20 equivalent to Category 1D

Area in which an atmosphere at risk of explosion in the form of a cloud of inflammable dust contained in the air is continuously or frequently present or present for long periods.

Category 2

For devices, which guarantee a high level of safety.

Intended for the case where an atmosphere at risk of explosion is to be expected。

Devices in this category can also be used in Category 3.

Inflammable gases, vapors or mists

Zone 1 equivalent to Category 2G

Area in which an atmosphere at risk of explosion as a mixture of air and inflammable gases, vapors or mists can form occasionally during normal operation.

Inflammable dusts

Zone 21 equivalent to Category 2D

Area in which an atmosphere at risk of explosion in the form of a cloud of inflammable dust contained in the air can form occasionally during normal operation.

Category 3

For devices, which guarantee a normal level of safety.

Intended for the case where an atmosphere at risk of explosion is to be expected rather infrequently and, if so,for only short periods.

Inflammable gases, vapors or mists

Zone 2 equivalent to Category 3G

Area in which an atmosphere at risk of explosion as a mixture of air and inflammable gases, vapors or mists does not normally occur at all or only for short periods during normal operation。

Inflammable dusts

Zone 22 equivalent to Category 3D

Area in which an atmosphere at risk of explosion in the form of a cloud of inflammable dust contained in the air does not normally occur at all or only for short periods during normal operation.


深圳中诺检测技术山东十一运夺金是大型的综合性第三方检测机构,提供检测及认证一站式服务平台。检测服务领域涵盖防爆认证、煤安认证、ATEX、IECEx、现场防爆检查、防爆电气设计、矿用设备检修资质证、汽车整车及零部件、电子电气、日用消费品、食品及食品接触材料、环境检测、电商检测服务等领域。深圳中诺检测凭借超过十年的防爆认证服务经验以合理的成本提供编制防爆认证所需企业标准以及其他相关资料的服务。专业承担厂用防爆、矿用防爆、船用防爆、粉尘防爆等防爆电气产品的设计和研发、改造、样品制作等项目,合作方式灵活,可以整体承包设计,也可以和客户进行联合设计。防爆试验室配备了防爆试验槽、隔爆性能试验系统、落锤式冲击试验机、跌落试验机等仪器设备。可为国内外客户的防爆类产品提供冲击试验、跌落试验、检查熔断器或者热断路器无火花型试验、限流电阻试验、检查电缆套管的抗火试验等在内的全部试验项目检测。 


检测认证咨询热线400-862-6488/18924609560(微信同号)

                                          QQ:156177344


关于我们
公司简介
企业文化
检测领域
汽车整车及零部件检测
电子电器认证
日用消费品检测
食品及食品接触材料
环境检测及环境技术服务
电商检测服务及其他
热点项目
防爆合格证
ATEx&IECEx认证
煤安认证
现场防爆检查
防爆设计
SIL认证
联系我们
  • 联系人:Anna
  • 电 话:0755-2102 2109
  • 手 机:18922836967
  • E-mail:anna@labsts.com
  • 地 址:深圳市光明新区高新西路11号研祥智谷研发楼7楼
河南快赢481 吉林快3 湖南幸运赛车 福建11选5 广西11选5 广东快乐十分 广西11选5 黑龙江11选5 上海时时乐 湖南快乐十分