copy of pipe bend againts coating 3lpe analisis

8/10/2019 Copy of Pipe Bend Againts Coating 3LPE Analisis

1/25

DESIGN INPUT

Pipeline Size/Nominal D 12.75

Material Carbon Steel API 5L- X52

Design Code ASME B31.8

CA (Corrosion Allowance) A 3

Location Class 1 Div. 2

Design Factor F 0.6

Elastic Roping radius of bend rb 1000000

Steel Coeffisien of Expansion 0.0000117

Modulus of Elasticity E 2.07E+05

Pressure and Temperature Data

Design Pressure P 9.31

Design Temperature (Underground) Td 93

Installation (beckfill) Temp Ti 22

Weld Joint Factor E 1

Temperature Derating Factor T 1

A. WALL THICKNESS

Grade X52

SMYS of Line Pipe S 52200

Wall Thickness Calculated

t requirement t 12.8

t+Coating Requirement (acuan) tc 14.7

t+Coating Requirement (actual) tc 14.73

D/t Check ( Should be < 96 ) 25.3

P

tmin 10.0t=

+


2/25

in 323.85 mm

mm

mm

Per C 6.50E-06 in/in/C

Mpa 3.00E+07 Psi

Mpa 1350.3 psi g 10.0

C 200 F

C 71.6 F

Psi 360 Mpa

mm 0.50 inch SCH80

mm 0.6 inch

mm 0.6 inch

Accept

0.13

peline Wall Thickness Calculation

mm 0.39 inch

(As Per ASME B31.8,Table 841.1.7-1)

(As Per ASME B31.8,Table 841.1.8-1)


3/25

0.39

0.39 10.0


4/25

DESIGN INPUT

Pipeline Size/Nominal OD 12.75 in

Material Carbon Steel API 5L- X52

Design Code ASME B31.8Selected Wall Thickness WT 0.50 in

Selected Wall Thickness + Coating WC 0.6 in

ID ID 12.25

Maximum Allowable Stress Sa 46980 Psi

Design Factor F 0.6

Pipe Length L 12 M

Spicified Minimum Yield Strength SMYS 52200 Psi

Modulus of Elasticity E 1.99E+05 Mpa

Design Pressure Internal Pi 9.31 Mpa

Joint factor (ASME B31.8) E 1

A. Natural Bend

Section Modulus of Pipe Z 30.29 in3

Moment Inertia of Pipe I 193.09 in4

Radius of Curvature 5862 in

R 9770 in

Max Bend Deg per Pipe 1.1 deg/Pipe


5/25

0.00

0.50

1.00

1.50

2.00

2.50

3.00

0 20 40 60 80 100

RADIUS

Pengaruh Radius terhadap B,Thinning

Percentage, Thinning Nominal, Pipe

Wall Thickness

B (deg)

Thinning Percentage (%)

Thinning Nominal (inch)

(tAB) Thickness Pipe After

Bend (inch)


6/25

323.85 mm

12.8 mm

14.7 mm

3.60E+02 Mpa

2.88E+07 Psi

1350 Psi

B. Field Cold Bend

Radius Tg (m) Lb (m) H (Inch) B (deg)

25 1.25 9.5 15 2.70

30 1.25 9.5 15 2.25

40 1.25 9.5 15 1.69

50 1.25 9.5 15 1.35

60 1.25 9.5 15 1.12

70 1.25 9.5 15 0.96

90 1.25 9.5 15 0.75

Field Bend Calculation


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0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

0 20 40 60 80 100

CBMAX

RADIUS

Pengaruh Radius terhadap CBmax

Cbmax (deg)


8/25

G (Point) Cbmax (deg)Thinning

Percentage (%)

Thinning Nominal

(inch)


Bend (inch)

25 67.3 0.16 0.080 0.42

25 56.1 0.13 0.067 0.44

25 42.0 0.10 0.050 0.45

25 33.6 0.08 0.040 0.46

25 28.0 0.07 0.033 0.47

25 24.0 0.06 0.028 0.48

25 18.7 0.04 0.022 0.48


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0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.0 20.0 40.0 60.0 80.0

CBMAX

Pengaruh CBmax terhadap B,Thinning

Percentage, Thinning Nominal, Pipe

Wall Thickness

Thinning Percentage (%)

Thinning Nominal (inch)


Bend (inch)


10/25

(tABC) (Pipe Wall thickness+Coating)

after Bending (inch)

Acceptance Criteria

0.50 Accept

0.51 Accept

0.53 Accept

0.54 Accept

0.55 Accept

0.55 Accept

0.56 Accept


11/25


12/25

Wall Thickness ( t ) 14.7

Hoop Stress (Sh) 128.6

Longitudinal Stress due to Thermal Expansion (St) 172.0

Longitudinal Stress due to Pressure (Sp) 38.6

Longitudinal Stress due to Bending Load (Sb) 33.5

Longitudinal Stress due to External Force (Sf) 0

Total Longitudinal Stress, SL

SL1= Sp + St + Sb + Sf 244.0

SL2= Sp + St - Sb + Sf 177.0

SL = MAX (|SL1|, |SL2|) 0.9 x SMYS = 324Mpa 244.0

Longitudinal Stress Check Accept

Combined Stress, Sc

Tresca

SCT1 = |Sh- SL1| 115.5SCT2 = |Sh- SL2| 48.4

Maximum Tresca Combined Stress, SCT 115.5

Von Mises

211.45

158.44

Maximum Von Mises Combined Stress, Scv 211.45

Maximum Combined Stress 0.9 x SMYS = 324Mpa 211.45

Combined Stress Check Accept

A. Stress Check Before Bend For Corroded Pipe Condition

1 = [ . 1 1]/

2 = [ . 2 2]/


13/25

mm

Mpa

Mpa

Mpa

Mpa

Mpa

Mpa

Mpa

Mpa

MpaMpa

Mpa

Mpa

Mpa

Mpa

Mpa

PIPELINE BEND STRE


14/25

Wall Thickness ( t ) 12.7 mm

Hoop Stress (Sh) 155.7 Mpa

Longitudinal Stress due to Thermal Expansion (St) 172.0 Mpa

Longitudinal Stress due to Pressure (Sp) 46.7 Mpa

Longitudinal Stress due to Bending Load (Sb) 33.5 Mpa

Longitudinal Stress due to External Force (Sf) 0 Mpa

Total Longitudinal Stress, SL

SL1= Sp + St + Sb + Sf 252 Mpa

Longitudinal Stress Check Accept

B. Stress Check After Bend For Corroded Pipe Condition

S ANALYSIS


15/25

Radius

25

30

40

50

60

70

90


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0.00

2.00

4.00

6.00

8.00

10.00

12.00

14.00

16.00

0 20 40

THICKNESS

Pengaruh


17/25

B (deg) Cbmax (deg)(tAB) Thickness Pipe After Bend

(mm)

2.70 67.3 10.75

2.25 56.1 11.10

1.69 42.0 11.53

1.35 33.6 11.78

1.12 28.0 11.95

0.96 24.0 12.08

0.75 18.7 12.24

FBE (Premier Epoxy) (m) Copolymer Layer (m)

Pada saat Pipa lurus80 350

FBE (Premier Epoxy) (m) Adhesive Layer (m)

80.00 350.00


18/25

0.041450777 0.18134715

60 80 100

ADIUS

adius terhadap tAB dan tABC


Bend (mm)

(tABC) (Pipe Wall

thickness+Coating) after

Bending (mm)

0.00

2.00

4.00

6.00

8.00

10.00

12.00

14.00

16.00

0.0 20.0

THICKNESS

Pengaru


19/25

(tABC) (Pipe Wall


Bending (mm)

Total thickness Coating 3LPE

After Bend(mm)

FBE (Premier Epoxy)

(m)

12.68 1.66 69

13.03 1.71 71

13.46 1.76 73

13.71 1.80 75

13.88 1.82 75

14.01 1.84 76

14.17 1.86 77

17%

Polyethilene ( Top Coat Layer)

(mm)


Before Bend(mm)

1.5 1.93 ACUAN

Polyethilene ( Top Coat Layer)

(mm)


Before Bend(mm)

1.5 1.93 ACTUAL

COATING 3LPE BEND CALCULATIO


20/25

0.777202073 1

40.0 60.0 80.0

CBMAX

Cbmax terhadap tABdan

tABC


Bend (mm)

(tABC) (Pipe Wall


Bending (mm)

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

0 20

THICKNESS

Pengar


21/25

Copolymer Layer (m)Polyethilene ( Top Coat Layer)

(mm)

Acceptance Criteria FBE

(Premier Epoxy)

301 1.29 Reject

310 1.33 Reject

320 1.37 Reject

326 1.40 Reject

330 1.41 Reject

333 1.43 Reject

337 1.44 Reject

9% 74%


22/25

40 60 80 100

RADIUS

h Radius terhadap t FBE,t CE, dan

tPE

Polyethilene ( Top Coat

Layer) (mm)

FBE (Premier Epoxy) (m)

Copolymer Layer (m)

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

0.0 2

THICKNESS

Pen


23/25

Acceptance Criteria

Copolymer Layer

Acceptance Criteria

Polyethilene Top Coat

Layer

Reject Reject0.068909








24/25

0.0 40.0 60.0 80.0

CBMAX

aruh CBmax terhadap t FBE,tCE,

dan tPE

FBE (Premier Epoxy) (m)

Copolymer Layer (m)

Polyethilene ( Top CoatLayer) (mm)


25/25

0.301475

0.309678

0.319866

0.325944

0.329982

0.332859

0.336686

copy of pipe bend againts coating 3lpe analisis

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