Do valves smaller than DN50 not require type testing?
Thread Content
Do valves smaller than DN50 not require type testing?
Valves with a nominal diameter of less than DN50 also require type testing, and the type testing of valves has no direct relation to their nominal diameter. .
Is it because it is considered to be outside the scope of the pressure pipeline catalog, so no action is needed?
The list of special equipment for which production licensing is required under the TSG 07-2019 standard excludes valves with a DN of less than 50. Valves that fall within the category of pressure pipeline components must undergo type testing in accordance with the requirements of the \"Rules for Type Testing of Pressure Pipeline Components\"; however, it is not clear how such type testing can be carried out for valves that are outside this scope. In practice, many clients request type test certificates for valves with a DN of less than 50 (consulting type testing agencies reveals that no reports can be issued for valves outside this scope), so as a compromise, it is necessary to submit test reports issued by third-party agencies, along with a large number of explanatory notes