NPT thread strength
NPT thread strength
(OP)
Does anyone know how To find out the amount force is needed to strip a 1 1/2" NPT thread made from 304 Stainless steel assuming a made-up length of engagement of about 0.68"?
Thanks
Thanks
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RE: NPT thread strength
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RE: NPT thread strength
A=0.5*pi*(Pitch Diam at hand tight engagement)*(Length of engagement fully tightened)
then I used the assumption that shear strength is about 0.62 that of 304 Stainless steel's tensile strength. (ASTM A 394)
Then I used F=Pressure*Shear Area to determing the force required to shear the threads from the NPT fitting.
Does this result make sense? I came up with about 90,000LBS. Also I am assuming that the fitting is coupled (ie a male is connected to a female at the time of shearing)