Overview
EN ISO 16136:2006 - Industrial valves - Butterfly valves of thermoplastics materials - specifies requirements for the design, manufacture, functional characteristics and testing of butterfly valves made from thermoplastic materials. The standard applies to hand- or power-operated valves for industrial pipe systems (all fluids), covering nominal sizes DN 15–DN 600, pressure ratings PN 6, PN 10, PN 16 and Class 150, a rated service temperature range of −40 °C to +120 °C, and an intended lifetime of 25 years. It also defines marking, documentation, storage and conformity requirements.
Key topics and requirements
- Design and materials: rules for valve body, trim and connection to piping systems; material suitability for pressure/temperature service.
- Pressure/temperature rating: tables and rating factors for PMA (allowable maximum operating pressure) across −40 °C to +120 °C.
- Dimensions and interfaces: face-to-face / centre-to-face and flange interfaces consistent with established piping dimensions.
- Operation and functional characteristics: requirements for manual and power operation, torque and actuation interfaces.
- Manufacture and traceability: production controls, marking, traceability and documentation requirements including declaration of compliance.
- Testing: specified test procedures including initial type tests and pressure/leakage tests (reference to valve test methods). Test documentation and acceptance criteria are required.
- Marking & storage: mandatory marking elements and preparation for storage/transportation.
- Regulatory linkage: informs conformity with EU Directive 97/23/EC (PED) where applicable (see Annex ZA).
Applications and users
- Valve manufacturers: for design, production and type-testing of thermoplastic butterfly valves.
- Specifiers and purchasers: to write technical specifications and procurement requirements for industrial and municipal piping systems.
- Engineers & designers: selecting valves by DN/PN/Class, temperature rating and expected lifetime for chemical, water, wastewater and process plants.
- Testing laboratories & conformity assessors: to perform the standardized tests and prepare compliance documentation.
- Plant operators / asset managers: for maintenance planning, replacement and verifying suitability of thermoplastic butterfly valves in service.
Related standards
EN ISO 16136 references and aligns with other standards relevant to valves and plastics piping, including:
- ISO 5211 (actuator attachments), EN 12266-1 (valve testing), ISO 8233 / ISO 8659 (torque & fatigue tests), EN 558 (face-to-face dimensions), EN 1092-1 (flanges) and material/system specifications such as ISO 15493 / ISO 15494.
Keywords: EN ISO 16136:2006, butterfly valves, thermoplastics, industrial valves, pressure/temperature rating, DN sizes, PN ratings, valve testing, PED compliance.
