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UL's
Hazardous Locations Services |
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| Over
75 Years of Domestic & International Hazardous Locations Certificator |
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|
FLAMMABLE
GASES, VAPORS OR LIQUIDS
|
| Class I Area
Classifications |
|
Division
1:
Where ignitable concentrations of flammable gases, vapors
or liquids can exist all of the time or some of the time under
normal operating conditions.
Division
2:
Where ignitable concentrations of flammable gases, vapors
or liquids are not likely to exist under normal operating
conditions.
|
Zone
0:
Where ignitable concentrations of flammable gases, vapors
or liquids can exist all of the time or for long periods of
time under normal operating conditions.
Zone 1:
Where ignitable concentrations of flammable gases, vapors
or liquids can exist some of the time under normal operating
conditions.
Zone 2:
Where ignitable concentrations of flammable gases, vapors
or liquids can exist some of the time under normal operating
conditions.
|
|
|
Division
1 & 2
A (acetylene)
B (hydrogen)
C (ethylene)
D (propane)
|
Zone
0, 1 and 2
IIC (acetylene & hydrogen)
IIB (ethylene)
IIA (propane)
|
|
| Class I Temperature
Codes |
|
Division
1 & 2
T1 ( 450ºC)
|
Zone
0, 1 and 2
T1 (450ºC)
|
|
T2 (300ºC)
|
T2 (300ºC)
|
T2A,
T2B, T2C, T2D
(280ºC,
260ºC,
230ºC,
215ºC)
|
|
T3
(<200ºC)
|
T3
(200ºC) |
T3A,
T3B, T3C
(180ºC,
165ºC,
160ºC)
|
|
T4
(135ºC)
|
T4
(135ºC) |
T4A
(120ºC)
|
|
T5
(100ºC)
|
T5
(100ºC) |
| T6
(85ºC) |
T6
(85ºC) |
|
| Class I, Division
1 and 2 Protection Methods |
| Area |
Protection
Methods |
Applicable
Certification Standards |
| U.S. |
Canada |
|
| Div.
1 |
•
Explosionproof
• Intrinsically safe (2 fault);
• Purged/pressurized (Type X or Y) |
ANSI/UL
1203
ANSI/UL 913
ANSI/NFPA 496 |
CSA-30
CSA-157
ANSI/NFPA 496 |
|
| Div.
2 |
•
Nonincendive
• Non-sparking device
• Purged/pressurized (Type Z)
• Hermetically sealed
• Any Class I, Div. 1 method |
UL
1604
UL 1604
ANSI/NFPA 496
UL 1604
---- |
CSA-213
CSA-213
ANSI/NFPA 496
CSA-213
---- |
|
|
| Class I, Zone
0, 1 and 2 Protection Methods |
| Area |
Protection Methods |
Applicable
Certification Standards |
| U.S.
|
Canada
|
IEC |
Europe |
| Zone 0 |
•
Intrinsically safe, ‘ia’ (2 fault);
• Class I, Div. 1 instrinsically safe (2 fault method) |
UL 2279,
Pt. 11
ANSI/UL 913 |
CSA-E79-11
CSA-157 |
IEC 79-11
---- |
EN 50020
---- |
| Zone 1 |
•
Encapsulation, ‘m’
• Flameproof ‘d’
• Increased safety, ‘e’
• Intrinsically safe ’ib’ (1 fault)
• Oil immersion ‘o’
• Powder filling ‘q’
• Purged/pressurized ‘p’
• Any Class I, Zone 0 method
• Any Class I, Div. 1 method |
UL 2279,
Pt. 18
UL 2279, Pt. 1
UL 2279, Pt. 7
UL 2279, Pt. 11
UL 2279
UL 2279
UL 2279, Pt. 2
----
---- |
CSA-E79-18
CSA-E79-1
CSA-E79-7
CSA-E79-11
CSA-E79-6
CSA-E79-5
CSA-E79-2
----
---- |
IEC 79-18
IEC 79-1
IEC 79-7
IEC 79-11
IEC 79-6
IEC 79-5
IEC 79-2
----
---- |
EN 50028
EN 50018
EN 50019
EN 50020
EN 50015
EN 50017
EN 50016
----
---- |
| Zone 2 |
•
Nonincendive ‘nC’
• Non-sparking device ‘nA’
• Restricted breathing, ‘nR’
• Hermetically sealed ‘nC’
• Any Class I, Zone 0 or 1 method
• Any Class I, Div. 1 or 2 method |
UL 2279,
Pt. 15
UL 2279, Pt. 15
UL 2279, Pt. 15
UL 2279, Pt. 15
----
---- |
CSA-E79-15
CSA-E79-15
CSA-E79-15
CSA-E79-15
----
---- |
IEC 79-15
IEC 79-15
IEC 79-15
IEC 79-15
----
---- |
prEN 50021
prEN 50021
prEN 50021
prEN 50021
----
---- |
|
|
The "Epsilon
Ex" is the European mark indicating compliance with CENELEC requirements.
This mark is recognized by all European Union member countries as
a legal means of entry under the European Directives for Potentially
Explosive Atmospheres, 761/117/EEC and 79/117/EEC. UL's Hazardous
Locations staff can assist in obtaining both this mark and the associated
Certificates of Conformity from a variety of European-Approved (Notified)
Bodies. In addition to Notified Bodies such as KEMA and PTB, UL can
also work directly through DEMKO A/S, a wholly owned subsidiary of
Underwriters Laboratories Inc., to obtain the "Epsilon Ex" mark and
the associated Certificates of Conformity. This relationship with
DEMKO A/S, in conjunction with UL's other domestic and international
services, now makes the process of gaining access to your key markets
easier than ever. |
Underwriters
Laboratories Inc. . 333 Pfingsten Road . Northbrook, IL 60062 . 847-272-8800
(voice) . 847-272-8129 (fax)
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