As per indian standard, calculation use to calculate tightening torque for all classed bolt,
Bolt Torque Value Calculations
o describe the differential of bolt torque and bolt tap test on derrick structure
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y
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its a material requirement per cu.m.Full description
it can be used for the calculation of labour required as per the quantity of work the calculation is as per the specifications of Book: Estimating & Costing by B.N. Dutta
seal
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CLIENT : TECNIMONT A/C NFL, NANGAL YAMUNA NAGAR INDIA Designed by:
PZG
EQPT. :
MOLECULAR SIEVE DRYER
PAGE:
JOB NO. PV-363/364 DR NO. BOLT TORQUE REQUIRED FOR SEALING FLANGES
DR-PV363 B
REV.
Ref: Procedure No. 2-10 pg. no. 59, Pressure Vessel Design Manual by Dennis Moss, 3rd edition.
DESIGN DATA Flange size Design pressure
P
Test pressure
PT
Moment
M
Radial load
Pr
Friction factor Design temperature
K
= = = = = = = = = = = = = = =
30" ID x Class 600 LWNRTJ 46.6 kg/cm2 46.6 x 9.80665 / 100 4.57 N/mm2 60.827 kg/cm2 60.827 x 9.80665 / 100 5.965 N/mm2 166.594 kN-m 166.594 x 1000 x 1000 166594000 NN-mm 152.2 kN 152.2 x 1000 152200 N 0.3 295 °C
w
=
Octagonal Ring R-95 (5Cr-1/2 Mo) 19.05 mm
m
=
y
=
150 N/mm2
Eg
=
195300 N/mm2
tg G
= =
8.045 mm 857.25 mm
n d
= = = = = =
GASKET DATA
Type Width of ring joint gasket (As per B 16.20) Gasket factor (As per ASME Sec VIII Div 1 Table 2-5.1) Gasket unit seating load (As per ASME Sec VIII Div 1 Table 2-5.1) Modulus of elasticity of gasket material at temperature (As per Sec. II Part D Ta ble TM-1) Thickness of gasket Diameter at location of gasket load reaction (As per B 16.20)
BOLTING DATA Material Nominal size Quantity Root diameter of threads (As per B 18.2)
6
SA-193 B16 (1Cr-1/2Mo-V) 2" UN8 28 1.8466 in 1.8466 x 25.4 46.904 mm
CLIENT : TECNIMONT A/C NFL, NANGAL YAMUNA NAGAR INDIA Designed by:
PZG
EQPT. :
MOLECULAR SIEVE DRYER
JOB NO.
PV-363/364 dm =
Pitch diameter of threads (As per B 18.2) Modulus of elasticity of bolting material at temperature (As per Sec. II Part D Ta ble TM-1) Cross-sectional area of bolts
Eb
= = =
Ab
=
PAGE:
DR NO. DR-PV363 B 1.9188 in 1.9188 x 25.4 48.738 mm 186400 N/mm2
d 2
REV.
n
4
Thickness of nut (As per B 18.2)
tn
= = = = =
( π x 46.904 ^ 2 x 28 ) / 4 48380.202 mm2 1.9688 in 1.9688 x 25.4 50.008 mm
l
Dimension (refer above figure) Effective length of bolt, mid nut to mid nut
x
Equivalent Pressure
Pe
lb
= = = = =
285.56 mm
x t n 285.56 + 50.008 335.568 mm 16 M 4 Pr
=
Hydrostatic end force
H
= =
G
3
G
2
P
( 16 x 166594000 ) / ( π x 857.25 ^ 3 ( 4 x 152200 ) / ( π x 857.25 ^ 2 ) + 4 6.181 N/mm2
G2
Pe
4
Total joint-contact-surface compression load Minimum required bold load for gasket seating Actual joint are contact for gasket
Hp
Wm2 Ag
=
( π x 857.25 ^ 2 x 6.181 ) / 4 3567497 N
= = = = = =
2 w G m Pe 2 x 19.05 x π x 857.25 x 6 x 6.181
3805330.1 N
w G y 7695619.8 N
2 w G
2 x π x 19.05 x 857.25 = = 102608.27 mm2 CLIENT : TECNIMONT A/C NFL, NANGAL YAMUNA NAGAR INDIA Designed by:
PZG
EQPT. :
MOLECULAR SIEVE DRYER
JOB NO.
PV-363/364
Decreasing compression force in gasket
ΔF
DR NO.
= 1
=
Initial required tightening force (tension)
Fbo
Total tightening force required to seal joint
W
Required torque
T
= = = = = = = = = =
PAGE: DR-PV363 B
H Ab E b
Ag
b
E g
REV.
t g l
3567496.967 / ( 1 + ( 48380.202 x 18 x 8.045 ) / ( 102608.265 x 195300 x 335.568 ) ) 3529418.7 N H p F 3805330.098 + 3529418.655 7334748.8 N
Max F bo ,W m 2 Max ( 7334748.753 , 7695619.839 ) 7695619.8 N 7695619.839 / 1000 7695.62 kN K W d m
