TS EN 764-3

TS EN 764-3 is a terminology standard that standardises the names and definitions of the parties involved in pressure equipment and assemblies. Because pressure equipment work typically involves multiple actors across design, manufacture, testing and inspection, a common vocabulary helps prevent ambiguous usage and improves technical communication.

The subject of this part is the set of parties associated with pressure equipment and assemblies addressed by the Pressure Equipment Directive. In general technical terms, these parties may include designers, manufacturers, inspection bodies, testing organisations, authorised representatives or similar responsibility holders. Clearly separating these roles makes it easier to understand who is responsible at each stage of an equipment’s lifecycle and reduces confusion in documentation, quality assurance and conformity assessment activities.

Why role definitions matter in pressure equipment work

Pressure equipment is a field where vessels, piping systems, safety accessories and related components may operate under significant internal pressure. Design, manufacture, testing and inspection are distinct technical functions, so a standard that defines the parties involved brings consistency to the language used across specifications and records. This document focuses on terminology, not on product performance requirements.

Practical scope of the terminology

• It covers the definitions of the parties involved in pressure equipment and assemblies.
• Its scope includes the design, manufacture, testing and inspection stages.
• The emphasis is on terminology, not on design rules or product limits.
• Consistent definitions support communication within regulatory and conformity assessment processes.