Overview
ISO 16138:2006/Amd 1:2019 provides an amendment to the international standard for industrial diaphragm valves made of thermoplastics. Issued by the International Organization for Standardization (ISO), this amendment updates references, clarifies technical requirements, and enhances alignment with evolving best practices in the manufacture and specification of thermoplastic diaphragm valves. Diaphragm valves are critical components in industrial piping systems, particularly for controlling the flow of various fluids where corrosion resistance and non-metallic construction are required.
Key Topics
- Updated Normative References: The amendment updates and replaces several references to other ISO and EN standards, ensuring that manufacturers and users follow the most current methodologies for valve design, testing, and material selection.
- Clarification of Materials: Clear identification of compatible thermoplastic materials - including ABS, PE, PP, PVC-U, PVC-C, and PVDF - and conformance requirements as per relevant international standards.
- Dimensional Requirements: Specification that face-to-face dimensions for flanged valves must comply with EN 558, while other end connections fall under manufacturer responsibility.
- Design Strength and Leaktightness: Requirements for verifying valve strength and shell/seat leaktightness through referenced test methods, particularly ISO 9393-2.
- Manual Operating Forces: Specification of allowable manual forces for lever and hand-wheel operations in accordance with EN 12570 to ensure safe, ergonomic use and protect the integrity of the diaphragm.
Applications
Implementing ISO 16138:2006/Amd 1:2019 is essential for:
- Valve Manufacturers: Ensuring that diaphragm valves of thermoplastic materials meet updated international standards for safety, performance, and compatibility with piping systems in diverse industries.
- Industrial System Designers: Selecting appropriate valve types and materials for chemical processing, water treatment, or fluid handling installations that require corrosion resistance and precise flow control.
- Quality Assurance: Compliance with the latest valve testing procedures enhances long-term reliability and minimizes risks of leakage or mechanical failure.
- Procurement and Supply Chain: Standardization of references supports consistent specification and sourcing of industrial valves across projects and international borders.
Typical industries benefiting from this standard include chemical processing, pharmaceuticals, water and wastewater management, and any application requiring robust, chemically resistant valve solutions.
Related Standards
The amendment references several critical international standards relevant for industrial valve manufacturing and use, including:
- ISO 15493: Specifications for piping systems of ABS, PVC-U, and PVC-C.
- ISO 15494: Specifications for PB, PE, PE-RT, PE-X, PP piping systems.
- ISO 10931: Specifications for poly(vinylidene fluoride) (PVDF) piping systems.
- EN 558: Face-to-face dimensions for metal valves in flanged systems.
- ISO 1167-1: Methods for testing internal pressure resistance in thermoplastics.
- ISO 5210: Attachments for multi-turn valve actuators.
- EN 12570: Guidance on maximum permissible manual forces.
- EN 12266-1: Pressure testing for metallic valves.
- EU Directive 2014/68/EU: Pressure Equipment Directive (PED) for compliance in the European Union.
These referenced standards ensure integrative compliance, guaranteeing that industrial diaphragm valves made from thermoplastics offer reliable, safe, and standardized performance in piping systems worldwide.
Adherence to ISO 16138:2006/Amd 1:2019 is essential for industrial stakeholders seeking robust quality control and international market acceptance for thermoplastic diaphragm valve products.