[MW:1549] Re: torque value

You can calculate torque in lbs.ft=KDP/12

K=universal factor=0.2 for finished bolts;0.22 Zn plated;0.3 Black;0.16 Cd plated;0.15-0.18 lubricated;0.1 highly lubricated or waxed.

D=Nom dia of bolt in Inch

P=Bolt's desired tensile load in Lbs(=75% of YSXArea)

Area=0.7854X Square of(D-0.9743/n) where "n" is threads per inch which above 1" size of bolt is 8

P.S.-Bolting stress can be anything from 33% to 75% of SMYS or it can be 50% extra over design stress value.

Regards

Aarpee

On Wed, Feb 11, 2009 at 9:32 AM, sadique sheikh <mails_sadique@yahoo.com> wrote:

Hello all of u can anyone tell me about the torque value required for bolt tightning above 36 inch.Actually i have torque value available upto 24 inch and i search for above 36 inch but i didn't get that. Regards Sadique

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