GB/T 1047-2019: Translated English of Chinese Standard. (GBT 1047-2019, GB/T1047-2019, GBT1047-2019): Pipework components - Definition and selection of nominal size
https://www.chinesestandard.net, Apr 14, 2019 - Technology & Engineering - 6 pages
This Standard gives the definition of DN (nominal size) of pipework components, and specifies the nominal size series used for pipework components. This Standard applies to pipework components which use the DN designation system.
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