Severity
Level
Copper Reactivity
Level
Description
G3 (harsh) 1000 Å/month to 2000
Å/month
An environment in which there is high
probability that corrosion will occur.
GX (severe) > 2000 Å/month An environment in which only specially
designed and packaged equipment would be
expected to survive.
See Table 7-6 for the copper and silver corrosion rate requirements.
Table 7-6 Concentration limitation of corrosive airborne contaminants in a data center
Group
Gas Unit Concentration
Group A H
2
S
ppb
a
< 3
SO
2
ppb < 10
Cl
2
ppb < 1
NO
2
ppb < 50
Group B HF ppb < 1
NH
3
ppb < 500
O
3
ppb < 2
a: Part per billion (ppb) is the number of units of mass of a contaminant per billion units of
total mass.
Group A and group B are common gas groups in a data center. The concentration limits of
group A or group B that correspond to copper reactivity level G1 are calculated based on the
premise that relative humidity in the data center is lower than 50% and that the gases in the
group interact with each other. A 10% of increase in the relative humidity will heighten the
gaseous corrosivity level by 1.
Corrosion is not determined by a single factor, but by comprehensive environmental factors
such as temperature, relative humidity, corrosive airborne contaminants, and ventilation. Any
of the environmental factors may affect the gaseous corrosivity level. Therefore, the
concentration limitation values specified in the previous table are for reference only.
7.5 Heat Dissipation and Noise
A storage system can run steadily using the heat dissipation system carried in its own fan
modules. An external device is necessary to remove the hot air discharged from a storage
system into the equipment room to ensure proper air circulation.
OceanStor 2600 V3
Product Description
7 Environmental Requirements
Issue 09 (2019-05-15) Copyright © Huawei Technologies Co., Ltd. 140
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