SIST EN 437:2005/kprA1:2008

SLOVENSKI STANDARD
SIST EN 437:2005/oprA1:2007
01-april-2007
Preskusni plini - Preskusni tlaki - Kategorije naprav - Dopolnilo A1
Test gases - Test pressures - Appliance categories - Amendment A1
Prüfgase - Prüfdrücke - Gerätekategorien
Gaz d'essai - Pressions d'essai - Catégories d'appareils
Ta slovenski standard je istoveten z: EN 437:2003/prA1
ICS:
27.060.20 Plinski gorilniki Gas fuel burners
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
SIST EN 437:2005/oprA1:2007 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
DRAFT
EN 437:2003
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
February 2007
ICS 27.060.20; 91.140.40

English Version
Test gases - Test pressures - Appliance categories
Gaz d'essai - Pressions d'essai - Catégories d'appareils Prüfgase - Prüfdrücke - Gerätekategorien
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 238.
This draft amendment A1, if approved, will modify the European Standard EN 437:2003. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.
This draft amendment was established by CEN in three official versions (English, French, German). A version in any other language made
by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 437:2003/prA1:2007: E
worldwide for CEN national Members.

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EN 437:2003/prA1:2007 (E)
Contents Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Gases .4
4.1 Classification.4
4.2 Test gases .4
5 Test pressures .6
6 Classification of appliances .7
6.1.2.2 Appliances designed for use on second family gases only .7
7 Choice of test gases and test pressures.7
8 Marking .7
Annex A (normative)  Conditions for preparation of the test gases.8
Annex B (informative)  National situations.9
B.1 General.9
B.2 Categories listed in the body of the standard marketed in the different countries.9
B.3 Appliance supply pressures corresponding to the categories given in B.2 .12
B.4 Special categories marketed nationally or locally .13
B.5 Test gases and test pressures corresponding to the special categories given in B.4 .18
B.6 Special conditions .20
Annex C (informative) Guidelines for extension to other categories .26
Annex D (informative) National situation of countries whose national bodies are CEN affiliate members27
D.1 General.27
D.2 Categories listed in the body of the standard and marketed in the different countries .27
D.3 Supply pressures of the appliances .28

2

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EN 437:2003/prA1:2007 (E)
Foreword
This document (EN 437:2003/prA1:2007) has been prepared by Technical Committee CEN/TC 238 “Test gases,
test pressures and categories of appliances”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the European
Free Trade Association, and supports essential requirements of EU Directive(s).
In Foreword of EN 437
Replace the four last paragraphs by the following ones:
This standard can be considered as an important stage in the harmonization of test gases, test pressures and
appliance categories and the quality of information on gas usage in Europe.
The standard also applies to Albania, Bulgaria, Croatia, Republic of Macedonia and Turkey, countries whose
national body is affiliate member of CEN (see annex D).

3

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EN 437:2003/prA1:2007 (E)
1 Scope
Unchanged
2 Normative references
Replace the introductory paragraph by the following (revised text in the CEN/CENELEC Internal Regulations, Part
3):
The following referenced documents are indispensable for the application of this European Standard. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced document
(including any amendments) applies.
Replace ISO 6976:1995 by EN ISO 6976:2005
Add:
EN ISO 13443:2005, Natural gas – Standard reference conditions.
3 Terms and definitions
In 3.1 and in its NOTE, replace:
"combustible gases" by "gaseous fuels"
4 Gases
4.1 Classification
Unchanged
4.2 Test gases
th
Replace 4 paragraph by:
The values in Tables 2 and 4, measured and expressed at 15 °C, are derived from EN ISO 6976:2005.
Replace Table 2 by the following one:
4

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EN 437:2003/prA1:2007 (E)
a
Table 2 – Characteristics of the test gases for the first and second families,
gas dry at 15 °C and 1 013,25 mbar
Gas family Test gases Designation Composition by W H W H d
i i s s
and Group volume
  e 3 3 3 3
%
MJ/m MJ/m MJ/m MJ/m
b
Gases of the first family
Group a Reference gas G 110
CH = 26
4
Incomplete combustion, flame 21,76 13,95 24,75 15,87 0,411
H = 50
2
lift and sooting limit gas

N = 24
2
Light back limit gas G 112
CH = 17
4
  19,48 11,81 22,36 13,56 0,367
H = 59
2

N = 24
2
b
Gases of the second family
Group H Reference gas G 20 45,67 34,02 50,72 37,78 0,555
CH = 100
4
Incomplete combustion and G 21 49,60 41,01 54,76 45,28 0,684
CH = 87
4
sooting limit gas
  C H = 13
3 8
Light back limit gas G 222 42,87 28,53 47,87 31,86 0,443
CH = 77
4

H = 23
2
Flame lift limit gas G 23 41,11 31,46 45,66 34,95 0,586
CH = 92,5
4

N = 7,5
2
f
G 24 47,01 35,70 52,09 39,55 0,577
Over heating limit gas
CH = 68
4

C H = 12
3 8

H = 20
2
Group L Reference gas G 25 37,38 29,25 41,52 32,49 0,612
CH = 86
4
light back limit gas

N = 14
2
Incomplete combustion and G 26
CH = 80
4
sooting limit gas
  C H = 7 40,52 33,36 44,83 36,91 0,678
3 8

N = 13
2
Flame lift limit gas G 27 35,17 27,89 39,06 30,98 0,629
CH = 82
4

N = 18
2
Group E Reference gas G 20 45,67 34,02 50,72 37,78 0,555
CH = 100
4
 G 21 49,60 41,01 54,76 45,28 0,684
CH = 87
4
Incomplete combustion and C H = 13
3 8
sooting limit gas
Light back limit gas G 222 42,87 28,53 47,87 31,86 0,443
CH = 77
4

H = 23
2
Flame lift limit gas G 231 36,82 28,91 40,90 32,11 0,617
CH = 85
4

N = 15
2
f G 24 47,01 35,70 52,09 39,55 0,577
Over heating limit gas CH = 68
4

C H = 12
3 8

H = 20
2
5

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EN 437:2003/prA1:2007 (E)
a
For gases used nationally or locally, see B.5.
b
For other groups, see B.5.
c
See also Table 4.
d
The appliance standards may only specify one sooting limit gas.
e
See also Annex A
f
Limit gas used only for certain types of appliance, specified in the individual appliance standards
.
Add:
NOTE Table 3 of EN 437:2003 was integrated into Table 2. This document does not contain a Table 3.
Delete Table 3.
Replace Table 4 by the following one:
Table 4 - Characteristics of the test gases a for the third family,
gas dry at 15 °C and 1 013,25 mbar
Gas family and Test gases Designation Composition by W H W H d
i i s s
Group volume
  e 3 3 MJ/kg 3 3 MJ/kg
%
MJ/m MJ/m MJ/m
MJ/m
b

Gases of the third family
Third family Reference gas n-C H = 50 80,58 116,09 45,65 87,33 125,81 49,47 2,075
4 10
and
Groups B/ P Incomplete combustion G 30 i- C H = 50
4 10
and sooting limit gas
Flame lift limit gas G 31 C H = 100 70,69 88,00 46,34 76,84 95,65 50,37 1,550
3 8
and B Light back limit gas G 32 C3H6 = 100 68,14 82,78 45,77 72,86 88,52 48,94 1,476
Group P Reference gas,  G 31 C H = 100 70,69 88,00 46,34 76,84 95,65 50,37 1,550
3 8
Incomplete combustion,
d
flame lift and sooting limit
gas
Light back and sooting limit G 32 C H = 100 68,14 82,78 45,77 72,86 88,52 48,94 1,476
3 6
d
gas
a

For gases used nationally or locally, see B.5.
b
For other groups, see B.5.
c
See also Table 4.
d
The appliance standards may only specify one sooting limit gas.
e
See also Annex A.
Relace the text of the NOTE by the following one:
NOTE The characteristics for second family gases at reference conditions other than 15 °C for metering and 15 °C for
combustion can be calculated using the coefficients given in EN ISO 13443, Annex A (Normative). As an example the
characteristics of the reference gases of the second family at 0 °C for metering and for combustion and 1 013,25 mbar (dry gas)
are given in Table 5.
5 Test pressures
rd
In Table 6, after the lines 3 family, 3B/P, add a line:
rd
3 family, 3P G 31, G 32 30 25 35

In table 7, replace the first column by the following:
6

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EN 437:2003/prA1:2007 (E)

Appliance categories
having as index
nd
2 family :

2E+
rd
3 family : 3+
(28-30''''37 couple)
rd
3 family : 3+
(50''''67 couple)
rd
3 family : 3+
(112''''148 couple)

6 Classification of appliances
6.1.2.2 Appliances designed for use on second family gases only
Replace definition of I by the following:
2R
Category I2R: appliances having a pressure governor using all the following gases of the second family and/or
gases linked to the second family (gas groups H, E, L and LL) which can be adjusted manually in order to utilize
the various gases of a group of the second family under the local condition of distribution (see Table B.6).
7 Choice of test gases and test pressures
Unchanged
8 Marking
Unchanged

7

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EN 437:2003/prA1:2007 (E)
Annex A
(normative)

Conditions for preparation of the test gases
Delete the reference to table 3 twice in the last paragraph.
8

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EN 437:2003/prA1:2007 (E)
Annex B
(informative)

National situations
B.1 General
Replace Table by the following one:
AT Austria IS Iceland
BE Belgium IT Italy
CH Switzerland LT Lithuania
CY Cyprus LU Luxembourg
CZ Czech Republic LV Latvia
DE Germany MT Malta
DK Denmark NL Netherlands
EE Estonia NO Norway
ES Spain PL Poland
FI Finland PT Portugal
FR France RO Romania
GB United Kingdom SE Sweden
GR Greece SI Slovenia
HU Hungary SK Slovakia
IE Ireland
B.2 Categories listed in the body of the standard marketed in the different countries
Replace Tables B.1 and B.2 by the following ones:
9

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EN 437:2003/prA1:2007 (E)
Table B.1 – Category I (single categories) marketed

a a a a
Country code I I I I I I I
2H 2L 2E 2E+ 2N I 3B/P 3+ I I I
2R 3P 3B 3R
AT x   x x
d
BE  x x x x x x
CH x   x x x
CY    x x x
CZ x   x x x
a c c c
DE  x x x
x x x
DK x   x
EE x   x x  x
a
ES x  x x x x x x
FI x   x
b b a c a
FR x x x x x
x x x x x
d
GB x   x x x x x
x
a
GR x  x x x x x x
x
c
HU   x x x
x
IE x    x x x
IS (?)
IT x   x x x x x
LT x   ? ?
LU (?)  x
LV x
MT
b
NL x   x x
x
NO x   x x  x
PL  x  x x
a
PT x  x x x x x x
x
c
RO x x  x x
x
SE x   x
a
SI x  x x x x x
x
SK x   x   x
a
Categories applicable only to certain types of appliances, specified in the individual appliance standards.
b
Categories applicable only to certain types of appliance, submitted to the on site EC verification procedure; Annex II, article 6 of the
gas appliance Directive (90/396/CEE)].
c
See B.6.
d

Category applicable only for appliances installed in Touring and Motoring Caravans.

The symbol (?) placed alongside the names of the countries means that the country concerned has not indicated its choice of category.

10

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EN 437:2003/prA1:2007 (E)
Table B.2 – Category II (double categories) marketed
Country
a a a a
II II II II II II II
1a2H 2H3B/P 2H3+ II 2L3B/P II II 2E3B/P 2E+3B/P 2E+3+ II
2H3P 2L3P 2R3R 2E+3P
code
x x
AT
a
     x
BE
x
x x x
CH
x x
CY
x x x
CZ
   x X
DE
x x
DK
x   x
EE
  c x  x
ES x
x
FI
  b b x a x x
FR x x x
 x x
GB
x x x  x
GR

HU
 x x
IE

IS
x x x x  x
IT

LT

LU

LV

MT
  x x
NL
x   x
NO
    x
PL
 x x  x
PT
x x x x x
RO
x x
SE
x x x  x
SI
x x x
SK
a
Categories applicable only to certain types of appliance, specified in the individual standards
.
b
Categories applicable only to certain types of appliance, submitted to the on site EC verification procedure ; [Annexe II, article 6 of
the gas appliance Directive (90/396/ EEC)].
c
Appliances of this category set for group H gases of the second family may use air and commercial propane gas mixtures where
3 3
the gross Wobbe index (at 15 °C and 1 013,25 mbar) is between 46 MJ/m and 51,5 MJ/m , at the same supply pressure, without

additional tests.
The symbol (?) placed alongside the names of the countries means that the country concerned has not indicated its choice of
category.

11

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EN 437:2003/prA1:2007 (E)
B.3 Appliance supply pressures corresponding to the categories given in B.2
Modify title by replacing "in B.2" by "in B.1 and B.2".
st
Modify 1 paragraph by replacing "in B.2" by "in B.1 and B.2".
Replace Table B.3 by the following one:
Table B.3 – Normal supply pressures
Category index 1a 2H 2E 2L 2E+ 3B 3P 3B/P 3+

Reference gas G G G G G 20'G 25 G 30 G 31 G 30 G 30'G 31
110 20 20 25

Pressure 8 20 20 25 20''''25 30 50 30 37 50 30 50 28-30''''37 50''''67 112''''148
(mbar)
28-30
Country code
AT x   e x e x
x x
g b b
BE   x x x x x x
x
g
CH
x    x x x x
bc bc bc
CY x  x x  x x x x
d c
CZ x    x x x? x
g h
DE  x   e x e x
x x
g
DK
x x     x
EE x     x
b
ES x  x  x  x
x
FI x     x?
g h
FR  f f x x b x b x x x b
x x x x x
a b
GB   x  x x x
x x
GR  x  x x x x? x? x
g h
HU  i    x
(x )
IE x  x  x  x
IS
g
IT x x    x x x
LT x  ?   ?
LU x
LV x
MT   x?
f
NL  x x  x x x x
NO  x     x?
g h
i
PL  x   x
(x )
PT x  x  x  x x
RO x x i  x  x
(x )
g h
SE x x     x?
SI x    x x x
SK x    x x x x x
a
For certain non-domestic appliances : 17,5 mbar.

b
Only for certain types of non-domestic appliance
c
For certain types of industrial appliances
d
For certain types of appliances.
e
Only for gas appliances in boats and leisure accommodation vehicles.
f
Categories applicable only to certain types of appliance, submitted to the on site EC verification procedure; [Annex II, article 6 of the
Gas Appliance Directive (90/396/CEE)].
g
See also B.4 for specific national categories
h
See also B.5 for specific national groups and pressures
i
See B.6 that gives the specific national pressures
The symbol (?) placed alongside the names of the countries means that the country concerned has not indicated its choice of category.


12

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EN 437:2003/prA1:2007 (E)
B.4 Special categories marketed nationally or locally
Replace Table B.4 by the following one:
Table B.4 – Test gases corresponding to categories marketed nationally or locally
Category Reference gas Incomplete Light back limit Lift limit gas Sooting limit gas Country
combustion gas gas
a
G 20 G 21 G 222 G 231 G 21 BE
I
2E(S)
a
G 20 G 21 G 222 G 231 G 21 BE
I
2E(R)
G 20, G 25 G 21 G 222 G 231, G 21 DE
I
2ELL
G 271
a
G 20, G 25 G 21 G 222 G 231 G 21 FR
I
2Esi
a
G 20, G 25 G 21 G 222 G 231 G 21 FR
I
2Er
b
G 20 G 21 G 222 G 23 G 21 HU
I
2H
b
G 20, G 25.1 G 21, G 26.1 G 222 G 23, G 27.1 G 21, G 26.1 HU
I
2HS
G20, G230 G 21 G 222, G 232 G 23, G 230 G 21 IT
I
2HM
G 20, G,27 G 21 G 222 G 2.412 G 21 PL
I
2ELw
G 20, G 21 G 222 G 2.352 G 21 PL
I
2ELs
G 2.350
G 20 G 21 G 222 G 2.302 G 21 PL
I
2ELn
G 2.300
G 20, G,27, G 21 G 222 G 2.352 G 21 PL
I
2ELwLs
G 2.350
G 20, G 27, G 21 G 222 G 21 PL
I
2ELwLsLn
G 2.350,
G 2.300 G 2.302
b
G 30 G 30 G 32 G 31 G 30 PL
I
3B/P
d
G 31, G 31 G 32, G 31,  PL
I
3P(B/P)
G 30 G 30 G 32 G 31 G 30 ?
G 130, G 20 G 21 G 132, G 231 G 21 FR
II
1c2E
G 222
G 130, G 20 G 21 G 132, G 231 G 21 FR
II
1c2E+
G 222
a
G 130, G 20 G 21 G 132, G 231 G 21 FR
II
1c2Esi
G 25 G 222
a
G 130, G 20 G 21 G 132, G 231 G 21 FR
II
1c2Er
G 25 G 222
G 1.250, G 20 G 21 G 1.252, G 222 G 1.252 G 21 PL
II
1Lm2E
G 1.250, G 20, G 21 G 1.252, G 222 G 1.252 G 21 PL
II
1Lm2ELwLsLn
G 27, G 2.350,
G 2.300
a
G 20, G30 G 21 G 222, G 32 G 231, G 31 G 30 BE
II
2E+3B
a
G 20, G 31 G 21, G31 G 222, G 32 G 231, G 31 G 21, G31, G 32 BE
II
2E(S)3P
a
G 20, G 31 G 21, G31 G 222, G 32 G 231, G 31 G 21, G31, G 32 BE
II
2E(R)3P
a
G 20, G 25, G 21 G 222, G 231, FR
II
2Esi3+
G 30
G 30 G 32 G 31
a
II
2Er3+
a
G 20, G 25, G 21 G 222, G 231, G 31, G 32 FR
II
2Esi3P
G 31 G 32 G 31
a
II
2Er3P
G 20, G 25, G 21, G 30 G 222, G 231, G 30 DE
II
2ELL3B/P
G 30 G 32 G 271
b
G 20, G 25.1, G 21, G 26.1, G 30 G 222, G 32 G 23, G 27.1, G 31 G 21, G 26.1, G 30 HU
II2HS3B/P
G 30
b
G 20, G 25.1, G 21, G 26.1, G 30 G 222, G 32 G 23, G 27.1, G 31 G 21, G 26.1, G 30 HU
II
2HS3B
G 30
G 20, G 230 G 21 G 222, G232 G 23, G 230 G30 IT
II
2HM3+
G 30
G 32 G 31
G 20, G 230 G 21 G 222, G232 G 23, G 230 G30 IT
II
2HM3B/P
G 30
G 32 G 31
13

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EN 437:2003/prA1:2007 (E)
Category Reference gas Incomplete Light back limit Lift limit gas Sooting limit gas Country
combustion gas gas
G 20, G 230 G 21 G 222, G232 G 23, G 230 G31, G 32 IT
II
2HM3P
G 31
G 32 G 31
G 20, G 30 G 21 G 222, G 32 G 231, G 31 G 30 PL
II
2E3B/P
G 20, G 31 G 21 G 222, G 32 G 231, G 31 – PL
II
2E3P
d
G 20, G 30, G 21 G 222, G 32 G 231, G 31 G 30 PL
II
2E3P(B/P)
G 31
G 20, G 2.350, G 21 G 222, G 2.352,  PL
II
2ELs3B/P
G 30 G 32 G 31 G 30
G 20, G 2.350, G 21 G 222, G 2.352, G 31 – PL
II
2ELs3P
G 31 G 32
G 20, G 27, G 21 G 222, G 32 G 2.352, G 31 G 30 PL
II2ELwLs3B/P
G 2.350, G 30
G 20, G 27, G 21 G 222, G 32 G 2.352, G 31 PL
II
2ELwLs3P
G 2.350, G 31
d
G 20, G 27, G 21 G 222, G 32 G 2.352, G 31 G 30 PL
II
2ELwLs3P(B/P)
G 2.350, G 31,
G 30
d
G 20, G 27, G 21 G 222, G 32 G 2.302, G 31 G 30 PL
II
2ELwLsLn3P(B/P)
G 2.350, G
2.300, G 31,
G 30
G 110, G 21 G 112, G 23, G 31 G 30 DK
III
1a2H3B/P
G 20, G 30 G 222, IT
G 32
G 130, G 21 G 132, G 231, G 30 FR
III
1c2E+3+
G 20, G 30 G 222, G 31
G 32
G 130, G 21 G 132, G 231, G 32 FR
III
1c2E+3P
G 20, G 31 G 222, G 31
G 32
G 130, G 132, G 231,

III
1c2Esi3+
G 20, G 21 G 222, G 31 G 30 FR
G 25, G 30 G 32

G 130, G 132, G 231,

III
1c2Esi3P
G 20, G 21 G 222, G 31 G 32 FR
G 25, G 31 G 32

G 130, G 132,

III
1c2Er3+
G 20, G 21 G 222, G 231, G 30 FR
G 25, G 30 G 32 G 31

G 130, G 132,

G 20, G 21 G 222, G 231
III
1c2Er3P
G 25, G 31 G 32 G 31 G 32 FR

G 110, G 21 G 112, G 23, G 31 G 30 IT
III
1a2H3+
G 20, G 30 G 222,
G 32
G 112, G 222,
G 110, G 20 G 21 G 23, G 230 G 30 IT
III1a2HM3B/P
G 232, G 32
G 230, G 30 G 31
G 112, G 222,
G 110, G 20 G 21 G 23, G 230 G 30 IT
III
1a2HM3+
G 232, G 32
G 230, G 30 G 31
G 112, G 222,
G 110, G 20 G 21 G 23, G 230 G 31, G 32 IT
III
1a2HM3P
G 232, G 32
G 230, G 31 G 31
G 130, G20, G 21 G 132, G 222, G 32 G 31 PL
III
1c2E3B/P
G 30 G 30
14

---------------------- Page: 15 ----------------------

EN 437:2003/prA1:2007 (E)

Category Reference gas Incomplete Light back limit Lift limit gas Sooting limit gas Country
combustion gas gas
G 1.250, G 20, G 21 G 1.252, G 222, G G 1.252, G 31 G 30 PL
III
1Lm2ELwLsLn
G 27, 32
3B/P
G 2.350,
G 2.300,
G 30
G 110, G 112

G 120, G 21 G 222, G 23, G 31 G 30 SE
III
1ab2H3B/P
G 20, G 30 G 32

c
G 150.1, G 20, G 21 G 152, G 222, G 32 G 23, G 31 G 30 DK
III
1e2H3B/P
G 30
a
Categories applicable only to certain types of appliance, specified in the individual standards.
b
see B.6 for specific pressure
c
The category is valid in DK from 10/2007
d
Only used on appliances less than 12 kW and at normal pressure of 37 mbar for both butane and propane


B.4.2.1.1 Appliances designed for the use of gases linked to the first family
Add:
Category I : appliances using only of group Lm gases linked to the first family at the prescribed supply pressure
1Lm
(this category is not used).
B.4.2.1.2 Appliances designed for the use of gases of the second family and the gases linked to it
Reorder I and I to first and second paragraphs.
2E(S)B 2E(R)B
Reorder I and I to third and fourth paragraphs.
2LL 2ELL
After last paragraph, add:
Category I : appliances using only gases of group S linked to the second family at the prescribed supply pressure.
2S
(this category is not used).
Category I : appliances capable of using gases of group H of the second family and gases of group S linked to
2HS
the second family. The gases of group H of the second family are used under the same conditions as for category
I . The gases of group S of the second family are used under the same conditions as for category I .
2H 2S
Category I : appliances using only gases of group M linked to the second family at the prescribed supply
2M
pressure. (this category is not used).
Category I : appliances capable of using gases of group H of the second family and gases of group M linked to
2HM
the second family. The gases of group H of the second family are used under the same conditions as for category
I . The gases of group M of the second family are used under the same conditions as for category I .
2H 2M
Category I : appliances using only of group Lw gases linked to the second family at the prescribed supply
2Lw
pressure. (this category is not used).
Category I : appliances using only of group Ls gases linked to the second family at the prescribed supply
2Ls
pressure. (this category is not used).
Category I : appliances using only of group Ln gases linked to the second family at the prescribed supply
2Ln
pressure. (this category is not used).
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EN 437:2003/prA1:2007 (E)
Category I : appliances capable of using gases of group E second family and gases group Lw and Ls linked to
2ELwLs
the second family. The gases of group E are used under the same conditions as for category I . The gases group
2E
Lw and Ls are used accordingly under the same conditions as for category I and category I .
2Lw 2Ls
Category I : appliances capable of using gases of group E second family and gases group Lw, Ls and Ln
2ELwLsLn
linked to the second family. The gases of group E are used under the same conditions as for category I . The
2E
gases group Lw , Ls and Ln are used accordingly under the same conditions as for category I , category I .and
2Lw 2Ls
category I .
2Ln
B.4.2.1.3 Appliances designed for the use of gases of the third family
Add:
Category I : appliances capable of using gases of group P and B/P third family. The gases of group P are used
3P(B/P)
under the same conditions as for category I . The gases group B/P are used under the same conditions as for
3P
category I .
3B/P
B.4.2.2 Category II
B.4.2.2.1 Appliances designed to use gases of the first family or that are linked to it and gases of the
second family or that are linked to it
Add
Category II : appliances capable of using of group Lm gases linked to the first family and gases of group E,
1Lm2ELwLsLn
Lw, Ls, Ln of the second family or linked to the second family. The gases linked to the first family are used under
the same conditions as for category I . The second family gases are used under the same conditions as for
1Lm
category I
.
2ELwLsLn
Category II : appliances capable of using gases of group E of the second family and gases of group P of the
2E(S)B3P
third family. The second family gases are used under the same conditions as for category I . The third family
2E(S)B
gases are used under the same conditions as for category I .
3P
Category II : appliances capable of using gases of group E of the second family and gases of group P of the
2E(R)B3P
third family. The second family gases are used under the same conditions as for category I . The third family
2E(R)B
gases are used under the same conditions as for category I .
3P
B.4.2.2.2 Appliances designed for the use of gases of the second family or that are linked to it and gases
of third family
After last paragraph, add:
Category II : appliances capable of using gases of group H of the second family, gases of group M linked to
2HM3+
the second family and gases of the third family. The second family gases or the gases that are linked to it are used
under the same conditions as for category I . Gases of the third family are used under the same conditions as for
2HM
category I .
3+
Category II : appliances capable of using gases of group H of the second family, gases of group M linked to
2HM3B/P
the second family and gases of the third family. The second family gases or the gases that are linked to it are used
under the same conditions as for category I . Gases of the third family are used under the same conditions as for
2HM
category I .
3B/P
Category II : appliances capable of using gases of group H of the second family, gases of group M linked to
2HM3P
the second family and gases of group P of the third family. The second family gases or the gases that are linked to
it are used under the same conditions as for category I . Gases of the third family are used under the same
2HM
conditions as for category I .
3P
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EN 437:2003/prA1:2
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