ONORM EN 437 : 2009
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
TEST GASES - TEST PRESSURES - APPLIANCE CATEGORIES
15-05-2019
12-01-2013
Foreword
1 Scope
2 Normative references
3 Terms and Definitions
4 Gases
4.1 Classification
4.2 Test gases
5 Test pressures
6 Classification of appliances
6.1 Appliance categories
6.1.1 General
6.1.2 Category I
6.1.3 Category II
6.1.4 Category III
6.2 Operations permitted for a change of gas or
pressure, adjustment and regulating devices
7 Choice of test gases and test pressures
8 Marking
Annex A (normative) - Conditions for preparation of the test
gases
Annex B (informative) - National situations
B.1 - General
B.2 - Categories listed in the body of the standard
marketed in the different countries
B.3 - Appliance supply pressures corresponding to the
categories given in B.2
B.4 - Special categories marketed nationally or locally
B.5 - Test gases and test pressures corresponding to
the special categories given in B.4
B.6 - Special conditions
Annex C (informative) - Guidelines for extension to other
categories
Annex D (informative) - National situation of countries whose
national bodies are CEN affiliate
D.1 - General
D.2 - Categories listed in the body of the standard
marketed in the different countries
D.3 - Supply pressures of the appliances
D.4 - Special categories marketed nationally or locally
D.5 - Gases and test pressures corresponding to
the special categories given in D.4
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