TS EN ISO 10628

TS EN ISO 10628 is the standard that sets out general rules for preparing flow diagrams for process plants. In chemical, process, energy and related industries, flow diagrams help present equipment, flow paths and the main process relationships in a common technical language. This document provides the shared framework for organizing such diagrams.

The technical role of flow diagrams

Flow diagrams are high-level engineering documents used before more detailed piping and instrumentation drawings. In general technical practice, they make it easier to read the main equipment, flow directions, key connections and the basic process logic. Consistent symbols, layout and presentation matter because they allow different disciplines to interpret the same document in the same way.

What this standard focuses on

• General rules for preparing flow diagrams for process plants.
• Common presentation principles that support readable and consistent technical drawings.
• A baseline approach that helps users understand industrial process documentation.

The standard provides a common basis for terminology and drawing arrangement in the visual representation of process flow, but it does not by itself describe a plant design. In practice, flow diagrams are used to understand process flow, review equipment relationships and support technical communication across project teams. TS EN ISO 10628 defines the general rules that standardize that communication.