[ P&ID SYMBOLS · STANDARD ]
DIN P&ID symbols (R&I-Fließschema)
In Germany a P&ID is the R&I-Fließschema, short for Rohrleitungs- und Instrumentenfließschema. Its equipment, valve and piping symbols follow DIN EN ISO 10628-2, the German edition of ISO 10628-2. Its instrumentation, the PLT-Stellen, follows DIN EN 62424. Older drawings may still use DIN 28004 and DIN 19227, which these standards replaced.
- Equipment, valves, piping
- DIN EN ISO 10628-2:2013 (identical to ISO 10628-2:2012)
- Diagram rules
- DIN EN ISO 10628-1, formerly DIN 28004
- Instrumentation (PLT)
- DIN EN 62424 (VDE 0810-24):2017-12, the German edition of IEC 62424:2016
- Replaced
- DIN 19227 for instrumentation, after a transition from January 2010 to July 2012. DIN 28004 for flow diagrams
- German terms
- R&I-Fließschema, RI-Fließbild, PLT-Stelle (formerly EMSR-Stelle or MSR-Stelle)
Valves DIN
About valvesControl and actuated valves DIN
About control and actuated valvesSafety devices DIN
About safety devicesPumps and compressors DIN
About pumps and compressors- KreiselpumpeCentrifugal pump2322
- VerdrängerpumpePositive displacement pumpX8094
- ZahnradpumpeGear pump8091
- SchraubenspindelpumpeScrew pump8092
- TurboverdichterCentrifugal compressorX8179
- KolbenverdichterReciprocating compressorX8097
- Ventilator, GebläseFan or blowerX8164
- TurbineTurbine2571
- RührwerkAgitator2672
Vessels and tanks DIN
About vessels and tanksHeat exchangers DIN
About heat exchangersFilters and strainers DIN
About filters and strainersInstruments DIN
About instruments- PLT-Stelle vor OrtField-mounted instrument
- PLT-Stelle in der MesswartePanel-mounted instrument
- Funktion im ProzessleitsystemDCS shared display
- ManometerPressure gauge
- DruckmessumformerPressure transmitter
- FüllstandmessumformerLevel transmitter
- DurchflussmessumformerFlow transmitter
- TemperaturmessumformerTemperature transmitter
- StandanzeigerLevel gauge
- MessblendeOrifice plateC0096
Line types DIN
About line typesPiping and fittings DIN
About piping and fittingsGerman and English names
The legend on this page is drawn to DIN EN ISO 10628-2 and DIN EN 62424, with the German name of each symbol. The table lists the ones you will meet most often, with the ISO registration number.
| Deutsch | English | ISO no. |
|---|---|---|
| Absperrschieber | Gate valve | X8074 |
| Durchgangsventil | Globe valve | X8068 |
| Kugelhahn | Ball valve | X8071 |
| Rückschlagventil | Check valve | X8077 |
| Absperrklappe | Butterfly valve | X8075 |
| Nadelventil | Needle valve | X8076 |
| Eckventil | Angle valve | 2102 |
| Dreiwegeventil | Three-way valve | 2103 |
| Stellventil | Control valve | X8087 |
| Sicherheitsventil | Pressure safety valve | X2125 |
| Berstscheibe | Rupture disc | X8080 |
| Flammendurchschlagsicherung | Flame arrestor | 2036 |
| Kreiselpumpe | Centrifugal pump | 2322 |
| Verdrängerpumpe | Positive displacement pump | X8094 |
| Zahnradpumpe | Gear pump | 8091 |
| Schraubenspindelpumpe | Screw pump | 8092 |
| Turboverdichter | Centrifugal compressor | X8179 |
| Kolbenverdichter | Reciprocating compressor | X8097 |
| Ventilator, Gebläse | Fan or blower | X8164 |
| Turbine | Turbine | 2571 |
| Rührwerk | Agitator | 2672 |
| Stehender Behälter | Vertical vessel | 2062 |
| Liegender Behälter | Horizontal vessel | 2062 |
| Kolonne | Column | X8101 |
| Festdachtank | Cone roof tank | X2063 |
| Kugelbehälter | Sphere | X8010 |
| Offener Behälter | Open tank | 2061 |
| Silo, Bunker | Silo or hopper | 2064 |
| Rohrbündelwärmeübertrager | Shell and tube heat exchanger | 2511 |
| Plattenwärmeübertrager | Plate heat exchanger | 2516 |
| Luftkühler | Air cooler | X2505 |
| Ofen | Fired heater | 2533 |
| Kühlturm | Cooling tower | 2521 |
| Verdampfer (Kettle-Reboiler) | Kettle reboiler | X8131 |
| Filter | Filter | X8116 |
| Schmutzfänger (Y-Form) | Y-strainer | X8090 |
| Korbfilter | Basket strainer | X8090 |
| Zyklonabscheider | Cyclone | X2618 |
| PLT-Stelle vor Ort | Field-mounted instrument | IEC 62424 |
| PLT-Stelle in der Messwarte | Panel-mounted instrument | IEC 62424 |
| Funktion im Prozessleitsystem | DCS shared display | IEC 62424 |
| Manometer | Pressure gauge | IEC 62424 |
| Druckmessumformer | Pressure transmitter | IEC 62424 |
| Füllstandmessumformer | Level transmitter | IEC 62424 |
| Durchflussmessumformer | Flow transmitter | IEC 62424 |
| Temperaturmessumformer | Temperature transmitter | IEC 62424 |
| Standanzeiger | Level gauge | IEC 62424 |
| Messblende | Orifice plate | C0096 |
| Hauptrohrleitung | Process line | 405 |
| Rohrleitung mit Begleitheizung | Heat traced line | C0106 |
| Doppelmantelrohr | Jacketed line | X409 |
| Reduzierstück, konzentrisch | Concentric reducer | 516 |
| Flanschverbindung | Flange | 511 |
| Blindflansch | Blind flange | 517 |
| Brillensteckscheibe | Spectacle blind | 2044 |
| Kompensator | Expansion joint | 533 |
| Schlauch | Flexible hose | X411 |
| Kondensatableiter | Steam trap | 2181 |
| Schauglas | Sight glass | 2034 |
| Entleerung | Drain | 2040 |
| Entlüftung | Vent | 2039 |
PLT-Stellen to DIN EN 62424
A PLT-Stelle is drawn as an oval. The letters go in the upper half and the number in the lower half. A horizontal line through the oval means the function is operated or displayed in the control room (Messwarte); no line means it is local. The old DIN 19227 drew the same functions as circles.
The letters changed with the standard, so drawings to DIN 19227 should not be read with the new table without checking. E is now voltage only, V is vibration instead of viscosity, A (analysis) and I (current) are new as first letters, and Z as a following letter now means a safety-relevant binary function.
More on the oval, the letters and how they compare with ISA 5.1 on the IEC 62424 page.
R&I-Fließschema Symbole auf Deutsch
Das R&I-Fließschema zeigt alle Rohrleitungen, Armaturen, Apparate, Maschinen und PLT-Stellen einer Anlage. Die Symbole für Apparate, Maschinen, Armaturen und Rohrleitungen sind in DIN EN ISO 10628-2 festgelegt, die Darstellung der PLT-Stellen in DIN EN 62424. Alle Symbole auf dieser Seite sind kostenlos als SVG und als druckbare PDF-Übersicht verfügbar.
Frequently asked questions
Which DIN standard defines P&ID symbols?
DIN EN ISO 10628-2:2013 defines the symbols for equipment, valves and piping on the R&I-Fließschema. DIN EN 62424 defines how instrumentation and control functions (PLT-Stellen) are drawn.
What replaced DIN 19227?
DIN EN 62424 replaced DIN 19227 for the representation of process control functions, after a transition period from January 2010 to July 2012. The circle became an oval and several letters changed meaning.
What replaced DIN 28004?
DIN 28004 for flow diagrams of process plants was replaced by DIN EN ISO 10628.
What is an R&I-Fließschema?
The German name for a piping and instrumentation diagram: Rohrleitungs- und Instrumentenfließschema, also called RI-Fließbild.
Is there a German P&ID symbols PDF?
Yes. The DIN chart on this page shows every symbol with its German name and is free to download.
The symbols on this page were drawn by Deskely to the forms of the standard and are free to use. Standards are revised and every project issues its own legend sheets, which take precedence.
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