Overview - EN ISO 16139:2006 (Gate valves of thermoplastics materials)
EN ISO 16139:2006 specifies requirements for the design, functional characteristics, manufacture and testing of gate valves made of thermoplastics intended for isolating service in industrial piping systems. The standard covers hand- or power-operated valves across nominal sizes DN 10–DN 350 and pressure classes PN 6, PN 10, PN 16 and Class 150, with a design service life of 25 years and a pressure/temperature rating range of −40 °C to +120 °C. It also addresses connection to pipe systems, body materials, marking, documentation and testing requirements.
Key topics and technical requirements
- Design & functional characteristics: criteria for valve construction and internal trim to ensure reliable isolation performance.
- Materials: requirements for thermoplastic body and trim materials compatible with pressure/temperature rating and fluid service.
- Pressure/temperature rating: defined PMA (allowable maximum operating pressure) relationships for the stated temperature range.
- Sizes and classes: applicability to DN 10–350 and PN 6/10/16, Class 150.
- Operation: requirements for manual and power operation (torque/force considerations referenced).
- Manufacture & traceability: production controls, traceability and marking provisions (including documentation for storage and transport).
- Testing: initial type tests, pressure tests and functional checks (references include EN 12266-1 and specific ISO test methods for thermoplastic valves).
- Normative references: standards referenced include ISO 7-1, ISO 228-1, ISO 8233, ISO 8659, ISO 15493/15494, EN 558, EN 1092-1, EN 12107 and others that define dimensions, threads, flanges and test procedures.
- Regulatory relationship: informative Annex ZA links the standard to EU Pressure Equipment Directive (97/23/EC / PED) for presumption of conformity where applicable.
- Valve manufacturers and designers specifying and certifying thermoplastic gate valves.
- Procurement and specification engineers preparing tender documents for industrial piping systems.
- Plant operators and asset owners in water treatment, chemical processing, HVAC, drainage/sewerage and general industrial utilities who require reliable isolation valves.
- Third-party testing and inspection bodies verifying compliance with type tests and marking/traceability requirements.
- Installation and maintenance teams using standardized dimensions (DN/PN/Class) for replacement and system compatibility.
Related standards
Relevant companion standards cited in EN ISO 16139:2006 include:
- EN 12266-1 (valve testing procedures)
- ISO 15493 / ISO 15494 / ISO 10931 (thermoplastics system/component specifications)
- EN 558 (face-to-face dimensions)
- EN 1092-1 (flanges)
- ISO 8233 / ISO 8659 (torque and fatigue test methods)
EN ISO 16139:2006 is essential for anyone specifying, manufacturing or maintaining thermoplastic gate valves, ensuring consistent safety, interchangeability and long-term performance.