ASME B16.1
Gray lron Pipe Flanges and Flanged Fittings
This Standard for Classes 25, 125, and 250 Cast Iron Pipe Flanges and Flanged Fittings. It includes (a) pressure-temperature ratings, (b) sizes and method of designating openings of reducing fittings, (c) marking, (d) materials, (e) dimensions and tolerances, (f) bolting and gaskets (g) pressure testing.
ASME B16.1 - SLIP ON FLANGE \ WELD NECK FLANGE
| Nominal Size, NPS | Working Pressures by Classes, bar | ||||||
4 | 125# |
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5 | 125# |
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6 | 125# |
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8 | 125# |
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10 | 125# |
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12 | 125# |
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14 | 125# |
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16 | 125# |
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18 | 125# |
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20 | 125# |
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22 | 125# |
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24 | 125# |
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26 | 125# | 250# |
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28 | 125# | 250# |
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30 | 125# | 250# |
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32 | 125# | 250# |
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34 | 125# | 250# |
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36 | 125# | 250# |
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38 | 125# | 250# |
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40 | 125# | 250# |
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42 | 125# | 250# |
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44 | 125# | 250# |
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46 | 125# | 250# |
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48 | 125# | 250# |
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50 | 125# |
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52 | 125# |
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54 | 125# |
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60 | 125# |
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66 | 125# |
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72 | 125# |
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78 | 125# |
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84 | 125# |
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90 | 125# |
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96 | 125# |
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