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)

Info on Hazardous substances

 

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).