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Well control equipment

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A=2⋅(T+0,5⋅t+d)+S<br />

A - stud bolt length exclusive of negative length<br />

tolerance, m<br />

T – flange thickness, m<br />

t – plus tolerance for flange thickness, m<br />

d – nut thickness (equals nominal bolt<br />

diameter), m<br />

S – flange face standoff (for BX<br />

assemblies it is zero), m<br />

n – negative tolerance on bolt length :<br />

1,5875 mm (1/16") for lengths up to 304,8<br />

mm (12"); 3,175 mm (1/8") for lengths over<br />

304,8 mm (12") to 457,2 mm<br />

(18"); 6,35 mm (1/4") for lengths over<br />

457,2 mm (18"), m

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