188
O
5H
For
N
G
5H
with:
k
pipe roughness, in mm (for steel pipes:
k
= 0,5 mm; for stainless steel pipes:
k
= 0,2 mm) is
5HOJ
»
»
¼
º
«
«
¬
ª
¸
¸
¹
·
¨
¨
©
§
O
O
For
d
k
d
k
5H
is
G
N
5H
OJ
»
»
¼
º
«
«
¬
ª
¸
¸
¹
·
¨
¨
©
§
O
O
For
5H !
d
k
is
N
G
OJ
»
¼
º
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¸
¸
¹
·
¨
¨
©
§
O
P.7.2 Friction loss data must be obtained from the foam concentrate manufacturer. Friction loss data
must be provided to the approval body when drawings and calculations are submitted.
P
The capacities of the necessary extinguish water collecting pools shall be determined according to the
national regulation (and CEA recommendations Disposal of foam agent and water foam mixtures shall be
done according to the national rules.
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