Pipeline marking

Lines to the condenser of an air conditioning system

Marking of the connections for sprinkler pipes and dry risers on a high-rise in San Francisco

The pipe marking is of great importance primarily in industrial plants and commercial buildings with complex building technology, such as hospitals . The pipelines to be marked are marked on the outside by color and number code, depending on the flow material. Pipelines can be marked with marking tapes or arrow-shaped signs. The flow substance is displayed as text and, depending on the type of substance, special colors indicate hazards. Basis: According to VBG 1 § 49 as well as that of DIN 2403 . VBG 1 has been replaced by BGV A1 and no longer contains Section 49. The labeling of pipelines for technical gases and liquids is also specifically standardized in other standards: Ship pipe identification ISO 14726, ship pipe identification SBG VG85009, identification tapes DIN 2404 heating systems, medical pipe identification EN 15908 and DIN 2405 (pipelines in refrigeration systems and cooling equipment - labeling). Large industrial plants and power plants have their own regulations, which are mostly based on DIN 2403.

The color code selected in DIN 2403 corresponds in some cases to the color code of the gas cylinder .

Another common marking is to mark the pipe according to the intended use, which is especially common in fire protection (example: riser pipe , sprinkler pipe )

Heating and plumbing installation

In building technology, the following abbreviations are used in heating and sanitary installations to identify the pipes and on planning documents.

Water supply

• TW - drinking water
• BW - operating water (does not meet the requirements for drinking water, for example. Clarified water )

Marking according to DIN EN 806 part 1:

• PWC - Potable Water Cold, ie: drinking water , cold - color code: green - previous code: "KW" for cold water
• PWH - Potable Water Hot, ie: drinking water, warm - color code: red - previous code: "WW" for hot water
• PWH-C - Potable Water Hot-Circulation, i.e.: drinking water pipe, warm, circulation - color coding: purple

Water disposal

• SW - black water ( dirty water with faeces )
• GW - gray water (waste water without faeces); GW-A - gray water system
• KW - clear water (purified gray water)

Heating systems

• VL - flow of the heating circuit ; alternatively: Hz V
• RL - Return of the heating circuit : alternatively: Hz R

See also

• Piping and instrument flow diagram
• Power plant identification system

Web links

• bg-verkehr.de: Marking of pipelines on seagoing ships (PDF; 237 kB), accessed on April 28, 2013
• Introduction to DIN 2403 at the DIN German Institute for Standardization e. V.
• Overview of the colors used according to flow substances in DIN 2403

Individual evidence

1. ↑ berufssicherheit.de , accessed on April 28, 2013
2. ↑ Archived copy ( Memento of the original dated December 6, 2013 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved April 28, 2013 
3. ↑ ^{a b} Frank Hartmann: Dirty water in housing , Forum Wohnenergie, SBZ 06/16, p. 62
4. ↑ Bruno Bosy: Abbreviations in SHK-Handwerk - Sanitär , In: Haustechnikdialog.de