SIEMENS
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Siemens MD 31.1 · 2016
Options for operation
Climatic stress, corrosivity category, coating system
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Overview
Climatic stress
In order to determine the applicable climatic stress, the climatic
conditions at the site of installation, on the intended transport
routes and in intermediate storage areas (where relevant) must
be taken into account.
The assigned corrosivity category is required for selecting the
correct coating system.
Ordering information
Corrosivity category
The atmospheric ambient conditions have been divided into five
corrosivity categories based on ISO 12944-2. These are
described below.
Coating system
The coating system is selected according to the intended appli-
cation, the prevailing climatic stress and, where appropriate, re-
quirements for explosion protection in accordance with ATEX.
The coating system is selected according to the highest corro-
sivity category that is deemed applicable on the basis of climatic
stress and application or information provided by the customer.
If ATEX requires explosion protection for areas of explosion sub-
group IIC or with minimum ignition energy
3mJ, then it is es-
sential to select an electrostatically conductive coating (order
codes B85, B86, B87) of the relevant corrosion category.
Ordering information
Position of the Article No.
1 to 6
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Order code
Assigned
corrosivity
category
Article No.
2LP202
.
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-Z
Climatic stress
Moderate climate zone (e.g. Central European conditions)
B01
C2
Maritime coastal areas, marine climate, maritime transport, tropical,
subtropical
B02
C4
Corrosive, chemical atmosphere, aggressive environmental conditions
B03
C5
Corrosivity category
Description
C1
• Indoor installation
Normal environmental pollution
• Heated buildings with a neutral atmosphere
C2
• Indoor and outdoor installation
Low environmental pollution
• Unheated buildings with condensation, production areas with low humidity, e.g. warehouses
• Atmospheres with little pollution, rural areas
C3
• Indoor and outdoor installation
Average environmental pollution
• Production areas with high levels of humidity and some air pollution
• Urban and industrial atmospheres with moderate sulfur dioxide loads
• Coastal areas with low salinity
C4
• Indoor and outdoor installation
High environmental pollution
• Environments with high humidity and occasionally high levels of atmospheric and chemical pollution
• Occasional acidic or caustic wet cleaning
• Industrial areas and coastal areas with moderate salt levels
C5
• Indoor and outdoor installation
Very high environmental pollution
• Buildings/areas with almost constant condensation and severe pollution
• Industrial areas with high humidity and aggressive atmosphere
• Regular acidic or caustic wet cleaning, including cleaning with chemical agents
• Coastal and offshore areas with high salinity
Highest calculated
corrosivity category
Standard coating with top coat
Explosion protection ATEX with explosion subgroup IIC or
minimum ignition energy
3mJ as an electrostatically
conductive coating
Order code
-Z
Order code
-Z
C1 - C3
B41
B85
C4
B43
B86
C5
B44
B87
© Siemens AG 2016