Zetkin Wall Thickness Calculations

Zektin Group 407 Royal Parade Parkville VIC 3052 Ph: (61) 3 8480 1000 Fax: (61) 3 8480 1055

CALCULATION TABLE OF CONTENTS DOCUMENT No : P09QGC02-000-CAL-L-002 PROJECT / JOB TITLE : CLIENT :

QCLNG E05 Pipeline Queensland Gas Company

QGC Doc No: QCLNG-BG00-PLE-CAL-000002 P09QGC02

JOB No. Sheet

2 of 23

CALCULATION TITLE: Pipe Wall Thickness Calculations to AS2885.1

Calculations

G G

1 2 3 4 5 6 7 8 9 10 11 12

Wall thickness Calculation for Design internal pressure Road Crossing Calculation - 1200mm Cover Road Crossing Calculation - 1500mm Cover Road Crossing Calculation - State Controlled Crossing 1200mm Cover Road Crossing Calculation - State Controlled Crossing 1500mm Cover Road Crossing Calculation - Unformed infrequent use Resistance to Penetration Calculation Pipe Ovality Wall thickness Summary Wall thickness Calculation for Design internal pressure of bends Buoyancy of Pipe Permissible External Pressure

page 3 4-6 7-9 10-12 13-15 16-18 19 20 20 21 22 23

Attachments 1 American Lifelines Alliance: Guidelines for the design of Buried Steel Pipe, July 2001. Sections 1-6 2 Density of soils: Marks' Standard Handbook for Mechanical Engineers, 8th Ed, pg 6-8

34 pages 1

Zektin Group 407 Royal Parade Parkville VIC 3052 Ph: (61) 3 8480 1000 Fax: (61) 3 8480 1055

CALCULATION P09QGC02-000-CAL-L-002 QGC Doc No: QCLNG-BG00-PLE-CAL-000002 JOB No. P09QGC02 DOCUMENT No : PROJECT / JOB TITLE : CLIENT :

QCLNG E05 Pipeline Queensland Gas Company

Sheet

3 of 23

CALCULATION TITLE: Pipe Wall Thickness Calculations to AS2885.1

1. Required Wall thickness Calculations as per AS2285.1 Design Pressure Nominal Pipe Outside Diameter Design Factors

PD = D= FD =

10.2 MPa 1067 mm 0.8

Below Ground Pipe - Option 1

FD =

0.72

Below Ground Pipe - Option 2

FD =

0.67

Design Temperature (Below Ground Pipe)

Td1 =

65

Design Temperature (Above Ground Pipe)

Td2 =

85

Pipeline Assemblies - Above ground Pipe o

C

o

C

> 65oC therefore derate of yield strength required as per AS2885.1 3.4.3

Below Ground Piping: Specified Min Yield Strength API5L X70

σYX70 =

485

MPa

API5L - 2007 Standard Table 7

Specified Min Yield Strength API5L X80

σYX80 =

555

MPa

API5L - 2007 Standard Table 7

Above ground Piping Reduction in yield = 0.07%/oC by which the design temperature exceeds 23oC therefore reduction in yield = 4.34 % Specified Min Yield Strength API5L X70

σYX70 =

463.95 MPa

Specified Min Yield Strength API5L X80

σYX80 =

530.91 MPa

1.1. Wall Thickness for design internal pressure (tp) AS2285.1 section 5.4.3

t

p

=

PD D 2 FDσ

equation 5.4.3

Y

For Design Factor FD=0.8 (Below Ground Pipe): Wall thickness for design internal pressure for API5L X70

tpX70 =

14.03 mm

Wall thickness for design internal pressure for API5L X80

tpX80 =

12.26 mm

For Design Factor FD=0.72 (Below Ground Pipe): Wall thickness for design internal pressure for API5L X70

tpX70 =

15.58 mm

Wall thickness for design internal pressure for API5L X80

tpX80 =

13.62 mm

For Design Factor FD=0.67 (pipeline assembly sections - Above Ground Pipe) : tpX70 = Wall thickness for design internal pressure for API5L X70 tpX80 = Wall thickness for design internal pressure for API5L X80 Summary - Calculated wall thickness requirements for internal pressure:

Grade API5L X70 API5L X70 API5L X70 API5L X80 API5L X80 API5L X80

FD 0.80 0.72 0.67 0.80 0.72 0.67

Nominal Thickness (mm) 14.10 15.60 17.60 12.30 13.70 15.30

17.51 mm 15.30 mm

Zektin Group 407 Royal Parade Parkville VIC 3052 Ph: (61) 3 8480 1000 Fax: (61) 3 8480 1055

CALCULATION P09QGC02-000-CAL-L-002 QGC Doc No: QCLNG-BG00-PLE-CAL-000002 JOB No. P09QGC02 DOCUMENT No : PROJECT / JOB TITLE : CLIENT :

QCLNG E05 Pipeline Queensland Gas Company

Sheet

4 of 23

CALCULATION TITLE: Pipe Wall Thickness Calculations to AS2885.1

2. Road Crossings as per AS2885.1 Clause 5.7.3 and API RP 1102 Section 4. All road crossing except for state controlled road crossings, ie council controlled, maintained access roads crossings. Design Pressure Nominal Pipe Outside Diameter Specified Min Yield Strength API5L X70 Specified Min Yield Strength API5L X80 Pipe Wall Thickness for API5L X70 pipe Pipe Wall Thickness for API5L X80 pipe

PD = D= σYX70 = σYX80 = twX70 = twX80 =

Temperature Derating Factor Design Factor Longitudinal joint factor Installation Depth Bored diameter Modulus of soil reaction Resilient Modulus Soil Density

T= F= E= H= Bd = E' = Er = γ=

G

10.2 1067 485 555 18.00 15.20 1 0.72 1 1200 1067 3.4 34 18.9

2.1 Circumferential Stress due to Earth Loads

MPa mm MPa MPa mm mm

API5L - 2007 Standard Table 7 API5L - 2007 Standard Table 7 (min required) (min required) o

AS2885.1 Section 3.4.3, T