Inspur NF5260FM6 User Manual page 62

ANSI/ISA-71.04-2013 Environmental Conditions for Process Measurement and

Control Systems: Airborne Contaminants classifies gaseous corrosivity levels
into G1 (mild), G2 (moderate), G3 (hash), and GX (severe). Table 11-8 shows
the Gaseous Corrosivity Levels per ANSI/ISA-71.04-2013.
Table 11-8 Gaseous Corrosivity Levels per ANSI/ISA-71.04-2013
Gaseous
Corrosivity Reactivity
Level
G1 (Mild) < 300 Å/month
G2 < 1000
(Moderate) Å/month
G3 (Harsh) < 2000
Å/month
GX (Severe) ≥ 2000
Å/month
Make sure that the corrosion rates of the tested copper and silver samples meet the
requirements of the corrosion concentration levels specified in "Gaseous
Corrosivity Levels per ANSI/ISA-71.04-2013." To do so, see the selected types of
corrosive gases and their concentration limits provided in the table "Concentration
Limits of Corrosive Gases in Data Centers."
Table 11-9 Concentration Limits of Corrosive Gases in Data Centers
Corrosive Gas
Group
Hydrogen
sulfide (H
Sulfur dioxide
(SO
Group A
Chlorine (Cl
Nitrogen
dioxide (NO
Copper Silver Reactivity
Level
< 200 Å/month
< 1000 Å/month
< 2000 Å/month
≥ 2000 Å/month
ppba
S)
2
ppb
)
2
) ppb
2
ppb
)
2
Level
An environment sufficiently
well-controlled so that
corrosion is not a factor in
determining equipment
reliability.
An environment in which
the effects of corrosion are
measurable and may be a
factor in determining
equipment reliability.
An environment in which
there is high probability that
a corrosive attack will occur.
An environment in which
only specially designed and
packaged equipment would
be expected to survive.
Unit
< 3
< 10
< 1
< 50
54
Description
Concentration