trunion_cal[1].1122

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