Buried Piping Stress Calc._worley.xls

Buried Pipe Calculation Report Not Design for Engineering Practice Notes bellow Report)

Ver. 1 (Test Ver.) (See

Buried Pipe Calculation Report

Code: B31.4-2012 American Lifeline Alliance

Input Data

General Information Date Report Name Piping Dimensions Pipe Diameter 508 mm Nominal Pipe Thickness 8.7 mm Sum of Allowance 0 mm Material Specified Min Yield Strength 358.52 Mpa Ultimate Stress 500 MPa Weld Joint Factor 1 Design factor 0.72 Pipe Modulus of Elasticity 203000 Mpa Poisson's Effect 0.3 Thermal Expansion Coefficient 0.0000117 mm/mm°c Lining Thickness 2 mm Coating Thickness 3 mm Lining Modulus of Elasticity 100000 MPa Coating Modulus of Elasticity 125000 MPa Lining/ Coating Mortar-Lined and Coated Design Condition Max. Design Temp. 76.7 °C Installation Temp. 10 °C Design Pressure 8273.7 Kpa(g) Longitudinal Stress Resulting from SUS Loads SL 2.52E+03 MPa Bending Moment due to Weight N/A KN.m Component SIF in Plane of Loading N/A Axial Load 0 KN Longitudinal Stress Resulting from OCC Loads SL 0.00E+00 MPa Bending Moment due to Weight N/A KN Thermal Stress for Unrestrained System SE 0 MPa Analysis Settings Elastic Stability Safe Factor 3 Concentrated Load Impact Factor for N/A Impact Factor for Live Load N/A Impact Factor 1.5 Bedding Constant 0.1 Deflection Lag Factor 1.5 Failure Theory Max Shear Stress Soil Properties Dry Backfill Density 2002.3 kg/m3 Title Name

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1

Buried Pipe Calculation Report Water Density Modulus of Soil Reaction

1000 3000

Concentrated Surface Load Height of Fill Height of Water Offset Distance Height of Cover (for Live )Load Live Load Height of Cover (for Impact Factor) Live Load Case Results Stress Source

Stress Type

Pin Pext EXP (Thermal) EXP (Thermal) SUS+P(υ)+EXP (SL) SUS+P (SL) SUS+P(υ)+EXP+OCC SUS+P+OCC SUS+P+EXP

(6)

Hoop Stress Hoop Stress Longitudinal Longitudinal Longitudinal Longitudinal Longitudinal Longitudinal Combined

(7)

kg/m3 Psi Dead Load 50 KN 1.2192 m 0.5 m 1 m Live Load 1 ft 12.5 Psi 0-1 ft "Highway" Stress

Allowable

Mpa

MPa

241.55 3.41 158.42 0 2607.95 2642.78 2607.95 2642.78 2849.51

258.13 258.13 322.67 -2047.63 322.67 268.89 322.67 286.82 322.67

Code Allowable 0.72.E.Sy 0.72.E.Sy 0.9.Sy

Accept.

System

(1)

Res/Unres Res/Unres Res. Unres. Res. Unres. Res. Unres.

0.9.Sy

Pass Pass Pass Failed Failed Failed Failed Failed Failed Failed

Res.

(2)

SA 0.9.Sy 0.75.Sy 0.9.Sy 0.8.Sy

Res.

Eff. Combined

324.1

322.67

0.9.Sy

(7) EXP+Pin+Pext-Road

Eff. Combined

117.37

322.67

Pass

Unres.

Pext

Elastic Stability

0.12

0.75

0.9.Sy Note (3)

Pass

Res/Unres

2607.95

434.57

Note (3)

Failed

124.06

179.26

0.5.Sy

Pass

Res/Unres

Note (3)

Pass

Res/Unres

EXP+Pin+Pext-Road

SUS+P(υ)+EXP

Source Ovality Warning:

Longitudinal Local Shell Buckling

Pext

Circumferential Through_Wall

Pext

Ring Buckling

Lining Coating Mortar-Lined and Coated

0.12 5 Actual mm 4.5319

1.35

Allowable mm 10.16

Res.

4

3

Accept. Pass

System

(1)

Res/Unres

Notes: 1. Res and Unres stand for Restrained and Unrestrained systems respectively. 2. For calculation of SA, please refer to 403.3.2 of B31.4-2012. Temperature ranges for restrained and unrestrained systems are based on what is mentioned in 402.5.1 and 402.5.2 of B31.4-2012 respectively. All allowable stresses must be less than Ultimate stress (SU). For unrestrained system: SA=f(1.25*(Sc+Sh)-SL), here it is assumed that f=1, Sc=Sh=2/3SY. 3. Refer to Appendix A of ALA.

Not Designed for Engineering Practice. (Refer to disclaimers)

2

Buried Pipe Calculation Report 4. It is checked only in restrained system. User can check it in unrestrained system. 5. ΔY is defined as ovality. 6. In combined stress calculation, it is assumed that SL=|Fa|-|νSH|+|M/z|+|FA/A|. If it fails, user can check the combined stress by correct sign of stress of |FA/A|. 7. In effective stress calculation for a pipe at road (Table 403.3.1-1 B31.4-20012), longitudinal expansion stress, longitudinal and circumferential hoop stresses resulting from internal pressure and circumferential hoop stresses due to external pressure are combined to reach an equivalent stress. Disclaimers 1. The calculated stresses in this sheet may not encompass all analyses which are required in a real engineering practice. For instance, buoyancy, earthquake, landslide, mine subsidence analysis have not been considered. Moreover some buried pipe analysis such as a unrestrained part of a buried pipe needs to be analyzed by a finite element methods. 2. The formula and methods which are used in this calculation sheet are based on those mentioned in the technical papers on the WWW.CALCSTRESS.COM website. User must be aware of the applied method's restrictions. 3. The owners of CALCSTRESS.COM cannot guarantee the completeness and accuracy of any information including formula and methods applied and used in this datasheet. It has been designed for training only. It may not be complete enough for a professional service. So, it must not be used for any professional services. CALCSTRESS IS NOT RESPONSIBLE FOR ANY DAMAGES, OMISSIONS AND ERRORS ARISING FROM USING THIS CALCULATION SHEET. 4. This sheet content may change without any prior notice. 5. Users are highly appreciated if they let CALCSTRESS know any problems or mistakes in the application. 6. User’s knowledge about the proper valid range of inputs and the methods limitations is necessary.

Not Designed for Engineering Practice. (Refer to disclaimers)

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Buried Pipe Calculation Report Ver. 1 (Test Ver.) Code: B31.4-2012 American Lifeline Alliance

Not Designed for Engineering Practice. (Refer to disclaimers)

4

Buried Pipe Calculation Report

Ref B31.4-2012 B31.4-2013 B31.4-2014 B31.4-2015 B31.4-2016 B31.4-2017 B31.4-2018 B31.4-2019 B31.4-2020 B31.4-2021 B31.4-2021 ALA ALA ALA ALA

Ref ALA

ained and unrestrained All allowable stresses re it is assumed that f=1,

Not Designed for Engineering Practice. (Refer to disclaimers)

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Buried Pipe Calculation Report

r can check the combined

al expansion stress, ential hoop stresses due to

a real engineering en considered. Moreover y a finite element

oned in the technical d's restrictions.

ny information including y. It may not be complete LCSTRESS IS NOT USING THIS

the application.

essary.

Not Designed for Engineering Practice. (Refer to disclaimers)

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