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Bolting Calculator

Use this calculator to determine how many and what studs/nuts you will need based on normal flange standards (ASME B16.5, API 6A, MSS SP44 and BS 1650)

Nominal Pipe Size:
Class:



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Valve Tip:
Multiplying 2.4 by the ANSI will give you a rough estimate of working pressure (except for 150# ANSI which is 285 working pressure). The rest of them are close enough to get you in the ballpark.