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Description of BS EN 558:2017 2017This European Standard specifies the “face–to-face” (FTF) and “ centre-to-face” (CTF) dimensions for PN and Class designated metal valves used in flanged pipe systems. This European Standard covers valves with the following PN, Class and DN values:
For valves in other shell materials than metal the same FTF and CTF dimensions may be used. For relationship between DN and NPS see Annex B.
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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