ISO 16137:2006/Amd 1:2019 PDF

Overview

ISO 16137:2006/Amd 1:2019 is an amendment to the international standard governing industrial valves, specifically check valves made from thermoplastic materials. Developed by ISO Technical Committee ISO/TC 138 and Subcommittee SC 7, this amendment updates key clauses related to dimensions, materials, testing, and design criteria for thermoplastic check valves. The standard targets valves ranging from DN 8 to DN 600 with pressure ratings PN 6 to PN 25 and Classes 150 and 300.

This amendment aims to ensure enhanced reliability, safety, and interoperability of industrial thermoplastic check valves and aligns with European Pressure Equipment Directive 2014/68/EU requirements. It provides manufacturers, installers, and quality controllers with updated guidelines on valve design, performance testing, and material specifications.

Key Topics

• Scope and Dimensions The standard addresses check valves across a broad diameter range (DN 8 through DN 600), covering various pressure ratings (PN 6 to PN 25) and class ratings (Class 150 and 300). Manufacturers may declare alternate DN and PN values, allowing for flexibility aligned with specific applications.

• Material Specifications Valve body and bonnet materials must conform to recognized ISO standards such as ISO 15493, ISO 15494, and ISO 10931. Approved thermoplastic materials include ABS, PE, PP, PVC-C, PVC-U, and PVDF, chosen based on durability and chemical resistance suitable for fluid transport systems.

• Design and Testing

  • Face-to-face valve dimensions align with EN 558 for flanged systems.
  • Design strength and long-term mechanical performance require conformance with ISO 9393-2 through pressure and operational tests.
  • Seat and shell leaktightness tests follow ISO 9393-2 and must meet leak rate requirements per EN 12266-1, ensuring minimal fluid escape through valve sealing components.
  • Materials undergo rigorous testing per ISO 1167-1 to verify resistance to internal pressure and long-term service.

• Rating Factors and Temperature Considerations The amendment provides updated rating factors for different thermoplastic materials relative to temperature exposure over expected lifetimes-critical for selecting appropriate valve materials based on operating environments.

• Normative References Update The amendment adds, replaces, or deletes normative references to harmonize with latest ISO and EN standards related to fasteners, mechanical properties, piping systems, and valving terminology, ensuring current best practices are reflected.

Applications

• Industrial Fluid Systems This standard supports the design and selection of thermoplastic check valves in chemical processing, water treatment, and fluid transport industries-where corrosion resistance, chemical compatibility, and lightweight construction are needed.

• Pressure Equipment Compliance With alignment to the EU Pressure Equipment Directive 2014/68/EU, the standard provides manufacturers and users a path to regulatory conformity for fluid pressure systems within European markets.

• Pipeline and Process Installations Updated face-to-face dimension requirements facilitate compatibility with existing piping systems, and durability tests ensure reliable check valve operation under varying pressures and temperatures.

• Quality Assurance and Traceability Manufacturers and quality controllers can apply this standard to verify materials, design strength, performance under test conditions, and full traceability of thermoplastic check valves in critical installations.

Related Standards

• ISO 15493 & ISO 15494 - Specifications for thermoplastic piping system components used alongside ISO 16137 materials guidelines.
• ISO 1167-1:2006 - Test methods for determining resistance to internal pressure in thermoplastic pipes and fittings.
• EN 558:2017 - Standardizes face-to-face and center-to-face dimensions for industrial valves, important for flange-compatible valves.
• EN 12266-1:2012 - Requirements for seat and shell leaktightness testing of valves.
• ISO 9393-2 - Protocols for assessing the design strength of valve components under pressure.
• ISO 898-1:2013 - Mechanical properties of fasteners used in valve assembly for ensuring structural integrity.
• EU Directive 2014/68/EU (Pressure Equipment Directive) - Provides regulatory framework for pressure equipment safety and market compliance in the EU.

Keywords: ISO 16137 amendment, thermoplastic check valves, industrial valves standard, thermoplastic valve materials, valve design testing ISO, check valve dimensions EN 558, valve leak tightness EN 12266, pressure equipment directive, fluid transport valves, polymer valves for pressure systems.