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trunion_cal[1].1122
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trunion_cal[1].1122
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Author:
Jagadish Jas
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TRUNNION CALCULATION SHEET Client: Project: Location:
Operating Case
Yanbu National Petrochemical Co. HDPE Project Yanbu , Saudi Arabia
Job №:
119784
Area:
Pipe Support Number: GS70-76B-632 By: jagadish Chkd: Date: 21/01/2008 Date:
46
Line Number:
GA №:
46-SM-1111-1CS1S02H1-4"-IH
Stress Sketch Number:
INPUT DATA:
IMP
Metric or Imperial Sizes :
Nominal Pipe Size =
16" (400)
Diameter (D) =
406.4
mm
Radius (R) =
203.2 mm
Nominal Thickness (T) =
12.7
mm
Pipe Minimum Thickness =
9.51 mm
Corrosion Allowance =
1.6
mm
Effective Wall Thickness (t) =
9.51 mm
Nom.Trunnion Size =
14" (350)
Diameter (d) =
355.6
mm
Radius (r) =
177.8 mm
Trunnion Wall Thickness =
9525
mm
Longitudinal Force (Fl) =
2360
Pad Nominal Thickness =
0
mm
Circumferential Force (Fc) =
2434
Moment Arm (L) =
700
mm
Direct Axial Load (Fa) =
33256
Max Design Pressure (P) =
28
bar
Material Type =
CS
HEADER STRESS =
14" TRUNNION
49% OF ALLOWABLE
(Using Kellogg's Method)
fl = [ ( Fl x L ) / πr² ] =
16.63 N/mm
(longitudinal lineal load)
fc = [ ( Fc x L ) / πr² ] =
17.16 N/mm
(circumferential lineal load)
fa = [ Fa / 2πr ] =
29.77 N/mm
(direct lineal load) f2 = [ 1.5 ( fc + fa ) ] =
61.29 N/mm 34.84 N/mm²
(longitudinal bending stress)
Sbc = ( 1.17 x f2 x √ R ) / t1.5 =.
40.01 N/mm²
(circumferential bending stress)
Spl = P x R / 20t =.
29.91 N/mm²
(longitudinal primary stress)
Sph = P x R / 10t =.
59.81 N/mm²
(hoop primary stress)
Sl = Sbl + Spl =.
64.75 N/mm²
(combined longitudinal stress)
Sc = Sbc + Sph =.
99.82 N/mm²
(combined circumferential stress)
137 N/mm²
(allowable stress)
Maximum Combined Stress (Sc or Sl) 1.5 x Sh
Pc
+
70.39 N/mm
Sbl = ( 1.17 x f1 x √ R ) / t1.5 =.
Sh =
f dir
0% OF ALLOWABLE
TRUNNION UNITY CHECK OK
CALCULATION:
UNITY CHECK:
137
(NO REPAD REQUIRED)
UNITY CHECK =
HEADER STRESSES OK
f1 = [ ( 1.5 fa ) + fl ] =
150
Allowable Stress (Sh) =.
16" HEADER
SUMMARY:
Maximum Operating Temp. =
Pc =
80 N/mm²
Pbc =
100 N/mm²
fbc xx + fbc zz Pbc
=
1.5 x Sh =
205.5 N/mm²
0.49 < 1.0 HEADER STRESSES OK
Area (a) = -208909951.52 mm² Section Modulus (Z) =
=
### mm3
fbc xx = ML / Z =
0.00 N/mm²
fbc zz = MC / Z =
0.00 N/mm²
f dir = Fa / a =
0.00 N/mm²
0.00 < 1.0 UNITY CHECK OK
Operating Case GS70-76B-632
1111-1CS1S02H1-4"-IH
(inc. rolling tolerance)
2360
N
2434
N
33256
N
C° N/mm²
OF ALLOWABLE
99.82
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