 |
UL's
Hazardous Locations Services |
 |
| Over
75 Years of Domestic & International Hazardous Locations Certificator |
| Class
II Area Classifications |
|
Division
1:
Where ignitable concentrations of cumbustible dusts can exist
all of the time or some of the time under normal operating
conditions.
Division
2:
Where ignitable concentrations of cumbustible dusts are not
likely to exist under normal operating conditions.
|
|
|
Division
1 & 2
E (metals)
F (coal)
G (grain)
|
|
| Class
II Temperature Codes |
|
Division
1 & 2
T1 ( 450ºC)
|
|
T2 (300ºC)
|
T2A,
T2B, T2C, T2D
(280ºC,
260ºC,
230ºC,
215ºC)
|
| T3
(<200ºC) |
T3A,
T3B, T3C
(180ºC,
165ºC,
160ºC)
|
| T4
(135ºC)
|
| T4A
(120ºC)
|
| T5
(100ºC)
|
| T6
(85ºC) |
|
| Class
II, Division 1 and 2 Protection Methods |
| Area |
Protection
Methods |
Applicable
Certification Standards |
| U.S. |
Canada |
|
| Div.
1 |
•
Dust-ignition
• Intrinsically safe
• Pressurized |
ANSI/UL
1203
ANSI/UL 913
ANSI/NFPA 496 |
CSA-25
or CSA-E1241-1-1
CSA-157
ANSI/NFPA 496 |
|
| Div.
2 |
•
Dusttight
• Nonindendive
• Non-sparking
• Pressurized
• Any Class II, Div. 1 method |
UL
1604
UL 1604
UL 1604
ANSI/NFPA 496
---- |
CSA-157
or CSA-E1241-1-1
----
----
ANSI/NFPA 496
---- |
|
|
| Hazardous
Location Markings |
| Class
I, II & III, Division 1 & 2 (U.S. & Canada) - This
marking would include: Class(es), Division(s), Gas/Dust Group(s),
Temperature Code Example: Class I, Division 1, Group C & D,
T4A |
Class
I, Zone 0, 1 and 2 (U.S. & Canada)
- This marking would include: Method A: For Zone Listings based
on UL 2279 or the CSA-E79 Series Class, Zone(s), Ex, Protection
Method(s), Gas Group, Temperature Code Example: Class I, Zone
1, Ex de IIB T4 Method B: For Zone Listings based on UL or CSA
Division Standards Class, Zone(s), Gas Group, Temperature Code
Example: Class I, Zone 1, Group IIB, T4
Note: For Canadian Zone Listings based on the CSA-E79 Series,
the "Class" and "Zone" elements of the markings string are optional |
| Zone
0, 1 and 2 (IEC only) - This marking would include:
Ex, Protection Method(s), Gas Group, Temperature Code Example:
Ex de IIB T4 |
| Zone
0, 1 and 2 (Europe only)
- This marking would include: EEx, Protection Method(s), Gas
Group, Temperature Code Example: EEx de IIB T4 |
|
|
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)
|
