区域

风险

保护概念

0

在其中爆炸性气体/空气混合物长时间连续存在。

Exia 或 Exs

1

在正常操作中，可能会发生爆炸性气体/空气混合物。

Exd. Exe, Exib, Exp, Exia, Exs

2

在正常操作中不太可能发生爆炸性气体/空气混合物。

适于区0和1，EXN，ExN和EXQ所有概念

Zone

Hazard

Protection Concepts

0

In which an explosive gas/air mixture is continuously present for long periods.

Exia or Exs

1

In which an explosive gas/air mixture is likely to occur in normal operation.

Exd. Exe, Exib, Exp, Exia, Exs

2

In which an explosive gas/air mixture is not likely to occur in normal operation.

All concepts suitable for Zone 0 & 1, ExN, ExO and Exq

保护方式

英国允许使用区域

代码字母IEC，EX ..，CENELEC，EEX

一般要求

—

—

油浸

2

o

加压

1 or 2

p

粉末填充

2

q

隔爆

1 or 2

d

增安

1 or 2

e

本安

* 0, 1 or 2

ia or ib

不易燃

2

n #

封装形式

1 or 2

m

特殊

1 or 2

s

* ia：区域0、1、2 / ib：区域1或2，但不是区域0 | ＃n：在英国本地使用

Method Of Protection

Permitted Zone Of Use In UK

Code Letter IEC, EX.., CENELEC, EEX

General requirement

—

—

Oil immersion

2

o

Pressurisation

1 or 2

p

Powder filling

2

q

Flameproof

1 or 2

d

Increased safety

1 or 2

e

Intrinsic safety

* 0, 1 or 2

ia or ib

Non-incendive

2

n #

Encapsulation

1 or 2

m

Special

1 or 2

s

* ia: Zone 0, 1, 2 / ib: Zone 1 or 2 but not Zone 0 | # n: used locally in UK

气体#组CENELEC EN 5014, IEC

代表型气体

I * (矿业)

甲烷

IIA

丙烷

IIB

乙烯

IIC

氢

Gas # Group CENELEC EN 5014, IEC

Representative Gas

I * (mining)

Methane

IIA

Propane

IIB

Ethylene

IIC

Hydrogen

T级/ IEC 79-7

最高表面温度°C

T1

450°C

T2

300°C

T3

200°C

T4

135°C

T5

100°C

T6

85°C

T Class / IEC 79-7

Max. Surface Temp °C

T1

450°C

T2

300°C

T3

200°C

T4

135°C

T5

100°C

T6

85°C

[

E

Ex

ia

]

IIC

T4

相关设备*

通过CENELEC标准认证

防爆保护

保护概念（IS）

相关设备*

设备组
（气体组）

温度等级
（非Gp I）

*（位于安全区域中，可能连接到危险区域）

[

E

Ex

ia

]

IIC

T4

Associated apparatus*

Certified to the CENELEC standard

Explosion protected

Protection concept (IS)

Associated apparatus*

Apparatus group (gas group)

Temperature classification (not Gp I)

* (located in safe area and may be connected to hazardous area)

设备组

设备类别

区

I

M = 矿业

—

矿业

M 1

—

矿坑气体/或可燃粉尘

M 2

—

II

G = 气体

其他领域

1 G

0, 1, 2

易爆气体环境

2 G

1, 2

3 G

2

在认证类别编号中的G之后添加D

D = 灰尘

（即GD）（如果设备也通过了粉尘类别批准）

1 D

20, 21, 22

2 D

21, 22

3 D

22

类别说明：

1-极高的安全性=即使出现罕见的设备故障情况下，也必须保证设备的安全性，例如两个组件同时故障。

2-高安全性=如果可以预期会频繁发生故障，则必须确保设备安全。一个组件的故障。

3 –正常运行中的安全=正常运行中必须确保设备安全。

注意：在指定设备类别之前，方括号中的数字表示设备符合指定的主要类别中其他类别的要求。
示例：II（1）2G表示该设备同时满足1 G和2 G类别的要求。

Device Group

Device Category

Zone

I

M = Mining

—

Mining

M 1

—

Pit Gas &/or Flammable Dusts

M 2

—

II

G = Gas

Other Areas

1 G

0, 1, 2

Explosive Atmosphere

2 G

1, 2

3 G

2

D is added after G in the certification class number

D = Dust

(i.e. GD) if device is dust category approved also

1 D

20, 21, 22

2 D

21, 22

3 D

22

Explanation of the categories:

1 - Very high safety = device safety must be guaranteed even in case of rare device failures, e.g. simultaneous failure of two components.

2 - High safety = device safety must be guaranteed if frequent failures can be expected, e.g. failure of one component.

3 – Safe in normal operation = device safety must be guaranteed in normal operation.

Note: A number in brackets before device category designation signifies that the device meets the requirements of an additional category to the main one that is specified.
Example: II (1) 2G signifies that the device meets requirements for both 1 G and 2 G categories

温度等级

最高表面温度

T1

<450ºC

T2

<300ºC

T3

<200ºC

T4

<135ºC

T5

<100ºC

T6

<85ºC

Temp. Class

Max. Surface Temp.

T1

<450ºC

T2

<300ºC

T3

<200ºC

T4

<135ºC

T5

<100ºC

T6

<85ºC

丙酮

19ºC

IIA

535ºC

T1

丁烷

-60ºC

IIA

365ºC

T2

庚烷

-4ºC

IIA

215ºC

T3

乙基甲醚

37ºC

IIB

190ºC

T4

注意：点火能量和点火温度之间无关

Gas/Vapour

Flashpoint

Gas Group

Ignition Temp.

Temp. Class

Acetone

19ºC

IIA

535ºC

T1

Butane

-60ºC

IIA

365ºC

T2

Heptane

-4ºC

IIA

215ºC

T3

Ethyl Methyl Ether

37ºC

IIB

190ºC

T4

Note: There is no connection between ignition energy and ignition temperature