Rev.0Gasket Details :

Gasket Material =Effective gasket width, b = 8.98 mmDiameter of Gasket load reaction, G = 988.64 mmModulus of elasticity of gasket material, Eg = 2.04E+06 Kg/cm2

(Ref: ASME Sec II Part D)Gasket thickness, tg = 4.5 mm

Bolting Details :

Stud Size = 2-1/2" UNCBolting material = SA 193 Gr.B7MPitch diameter of threads, dm = 20.4 mmRoot diameter of threads, d = 18.77 mmNumber of bolts, n = 12Root area of bolts, Ab = 270 mm2

Modulus of elasticity of bolting material, Eb = 2.06E+06 Kg/cm2

Effective length of bolt, lb = 110Hydrostatic End Force, H = 1300 KgTotal joint-contact surface load, Hp = 8660.0 Kg (From Flange Design)Minimum required bolt load, Wm2 = 38269.0 KgFriction Factor, K = 0.2 (Dennis moss)

Calculation :

Actual joint area contact for gasket, Ag

Ag = 2*3.14* bG= 55782.04 mm2

Decreasing Compression force in gasket, F*

F* = H / (1+ (Ab Eb tg / Ag Eg lg))= 1.30E+03 Kg

Initial required tightening force, Fbo

Fbo = Hp + F*= 9959.742 Kg

Total tightening force required to seal joint, W

W = Max ( Fbo (or) Wm2 )= 38269 Kg

Required Torque, T(Max)

T = K W *dm / n= 13.01 Kg.m

Required Torque, T(Min)T = K Wm2*dm / n

= 13.01 Kg.m128.00 N.m

(Ref: ASME Sec II Part D)

BOLT TORQUE REQUIRED FOR SEALING FLANGES 25-D-109A/B(Ref: ASME Sec.VIII Div.2 and Pressure Vessel Design Manual - Dennis Moss )

FLANGE - "M" Body Flange

(From Flange Design.)

SS 316L With SS Inner & CS Outer ring