Proceedings of the

The 33rd European Safety and Reliability Conference (ESREL 2023)
3 – 8 September 2023, Southampton, UK

From Fault Trees to Piping and Instrumentation Diagrams

Wouter Bos1, Matthias Volk1,a, Mariëlle Stoelinga1, Marc Bouissou2 and Pavel Krčál3

1University of Twente, The Netherlands.

2Électricité de France, France /EADDRESS/
3RiskSpectrum AB, Sweden /EADDRESS/


Piping and Instrumentation Diagrams (P&IDs) are a graphical representation of the design of industrial plants. While images of P&IDs for a given system exist, a formal representation of a P&ID containing safety-relevant information is often missing. Such a formal P&ID model (1) provides a high-level representation of the system including its safety and reliability properties which is easier to understand for non-experts, and (2) enables automatic generation of fault trees by tools like RISKSPECTRUM MODELBUILDER, which allows for systematic updates of the safety model after system modifications.

In this work, we aim to automatically infer a formal representation of (the safety-relevant part of) a P&ID from a given a set of fault trees. Fault trees (FTs) are manually created from P&IDs and capture the safety-relevant part of the system.We present an automatic translation from FTs to P&IDs. The transformation starts by creating the P&ID components from the labels of basic events in the FTs. In a second step, the topology of the P&ID - including the pipe connections - is inferred from the structure of the FTs and their minimal cut sets.

Keywords: Piping and instrumentation diagrams, Fault trees, Automatic translation, Safety analysis, Formalisation.

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