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All the structures and construction cracks of doors, windows, walls, and
ground (floors) must be sealed.
If there are water supply and drainage pipes in the server room, anti-leakage
and anti-condensation measures should be taken.
If there is water equipment in the main server room, measures must be taken
to prevent water overflow and leakage.
Block cable holes and antenna holes.
Clean and sterilize the server room periodically.
3.
Corrosive Airborne Contaminants
Generally, a small quantity of common corrosive gas pollutants exist in indoor and
outdoor atmospheric environments. Chemical reactions may occur due to long-
term contact between these mixed corrosive gas pollutants or pollutants of one
single corrosive gas and other environmental factors (such as temperature or
relative humidity), which may pose a risk of IT equipment failure from corrosion
and damage circuit boards of IT equipment and system component units with
weak oxidation resistance. This article specifies the limitation on corrosive airborne
contaminants with an aim to avoid such risks.
The concentration level of corrosive airborne contaminants in a data center shall
meet the requirements listed in the white paper entitled Gaseous and Particulate
Contamination Guidelines for Data Centers published in 2011 by American Society
of Heating Refrigerating and Air-conditioning Engineers (ASHRAE) Technical
Committee (TC) 9.9. According to the Guidelines, corrosive airborne contaminants
in a data center shall meet the following requirements:
Copper coupon corrosion rate less than 300 Å/month per ANSI/ISA-71.04-2013
severity level G1.
Silver corrosion rate less than 200 Å/month per ANSI/ISA-71.04-2013 severity
level G1.
According to ANSI/ISA-71.04-2013 Environmental Conditions for Process
Measurement and Control Systems: Airborne Contaminants, the gaseous
corrosively levels are G1 (mild), G2 (moderate), G3 (harsh), and GX (severe), as
described in Table 8-7.
Table 8-7 Gaseous Corrosively Levels per ANSI/ISA-71.04-2013
Gaseous
Corrosivity
Level
Copper Reactivity
Level
Silver Reactivity
Level
Description
G1 (mild)
< 300 Å/month
< 200 Å/month
An environment
sufficiently well-
