Authority’s Order no. 743/99, article 3.
DN<100
and
PS x DN< 1000
DN<25 mm
Refrigerant group 1
NWEA 743/99
App. 2 diagramme 6
Pipe system is
gov. by
Art. 3 (3)
yes
no
Pipe system is in
safety category I
yes
no
DN<350
and
PS x DN< 3500
Pipe system is in
safety category II
Pipe system is in
safety category III
yes
no
Determination of pipe system
safety category
The pipe system safety category appears from appendix 2.
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