Since the size of the gasket is based on the size of the pipe fitting, it is difficult to determine the size of the gasket based on its dimensions. The following are nominal dimensions for Standard 11851 DN Style Gaskets and are for reference only.
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SIZE
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I.D.
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O.D.
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TH |
| DN10/4.5 | 12MM | 20MM | 4MM |
| DN15/4.5 | 18MM | 26MM | 4MM |
| DN20/4.5 | 23MM | 33MM | 5MM |
| DN25 | 30MM | 40MM | 5MM |
| DN32 | 36MM | 46MM | 5MM |
| DN40 | 42MM | 52MM | 5MM |
| DN50 | 54MM | 64MM | 5MM |
| DN65 | 71MM | 81MM | 5MM |
| DN80 | 85MM | 95MM | 5MM |
| DN100 | 104MM | 114MM | 5MM |