ISO/DIS 23632 Industrial valves - Design Validation - testing of valves - Draft for public comment



What is it?: This document specifies requirements and acceptance criteria for type testing of metallic butterfly and ball valves used for isolating services for all industrial applications, and serves to validate the product design for 205 cycles. This document excludes control valves, thermoplastics valves and safety devices. This document defines the procedure for extending the qualification of the tested valve to untested sizes and pressure designations of the same product range.

Why is it important?: The purpose of this type test is to validate the seat performance within manufacturer given pressure/temperature rating, provided by the manufacturer’s technical documentation of the product. This validation testing verifies torque requirements and MAST, as given in the manufacturer technical documentation. This validation test validates the durability of seat performance and operating torque through mechanical and thermal cycles. Type testing is the most reliable method to validate a product, covering many aspects, such as its design, material selection and manufacturing processes. It will also serve as a guide for valve selection, allowing customers to compare different valve types, designs and brands. Having an international standard will reduce manufacturer's cost by decreasing the number of design validations and end-user total cost-of-ownership by eliminating unintentional design flaws and planned obsolescence. The work in the ISO committee will complement the work on prEN17070 in CEN TC69/WG1, which is intended to established performance levels for different valve types for different applications

Supersedes: This is the first draft of a new international standard.

Published in Valve User Magazine Issue 53


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