Identification
Pipework
In Germany, pipework is identified according to DIN 2403. The identification must be attached at suitable intervals to operationally-critical or hazardous points and contain the following elements:
- Flow arrow
- Flow material (word, chemical formula, identification number or code)
- Danger pictogram, if applicable (e.g. with combustible gases/fluids, acids and alkalis)
|
Flow material |
Group |
Group colour |
Additional colour |
Lettering/arrow/edge colour |
|
Water |
1 |
Green |
– |
White |
|
Water vapour |
2 |
Red |
– |
White |
|
Air |
3 |
Grey |
– |
Black |
|
Combustible gases |
4 |
Yellow |
Red |
Black |
|
Non-combustible gases |
5 |
Yellow |
Black |
Black |
|
Acids |
6 |
Orange |
– |
Black |
|
Alkalis |
7 |
Violet |
– |
White |
|
Combustible liquids and solids |
8 |
Brown |
Red |
White |
|
Non-flammable liquids and solids |
9 |
Brown |
Black |
White |
|
Oxygen |
0 |
Blue |
– |
White |
Identification of pipework according to DIN 2403
|
Group colour/additional colour |
Identification colours according to DIN 5381 |
|
Green |
RAL 6032 signal green |
|
Red |
RAL 3001 signal red |
|
Grey |
RAL 7004 signal grey |
|
Yellow |
RAL 1003 signal yellow |
|
Orange |
RAL 2010 signal orange |
|
Violet |
RAL 4008 signal violet |
|
Brown |
RAL 8002 signal brown |
|
Blue |
RAL 5005 signal blue |
|
Black |
RAL 9004 signal black |
|
White |
RAL 9003 signal white |
Identification colours according to DIN 5381
Hazardous substances
The hazard symbols (identification of hazardous substances) must be implemented according to the European CLP ordinance.
The ordinance (EC) No. 1272/2008 for classification, labelling and packaging of substances and mixtures (CLP ordinance) adapts the EU legal regulations to the globally harmonised system for classification and identification of chemicals (GHS).