0
Research Papers: Structures and Safety Reliability

Reliability Analysis of Pipelines With Local Corrosion Defects Under External Pressure

[+] Author and Article Information
A. P. Teixeira

Centre for Marine Technology and Ocean
Engineering (CENTEC),
Instituto Superior Técnico,
Universidade de Lisboa,
Avenida Rovisco Pais, No. 1,
Lisboa, 1049-001, Portugal
e-mail: teixeira@centec.tecnico.ulisboa.pt

O. G. Palencia

Centre for Marine Technology and Ocean
Engineering (CENTEC),
Instituto Superior Técnico,
Universidade de Lisboa,
Avenida Rovisco Pais, No. 1,
Lisboa, 1049-001, Portugal
e-mail: oscar.palencia@centec.tecnico.ulisboa.pt

C. Guedes Soares

Fellow ASME
Centre for Marine Technology and Ocean
Engineering (CENTEC),
Instituto Superior Técnico,
Universidade de Lisboa,
Avenida Rovisco Pais, No. 1,
Lisboa, 1049-001, Portugal;
Ocean Engineering Department,
COPPE,
Federal University of Rio de Janeiro,
Rio de Janeiro, 21941-972, Brazil
e-mail: c.guedes.soares@centec.tecnico.ulisboa.pt

1Corresponding author.

Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received August 18, 2017; final manuscript received December 19, 2018; published online February 15, 2019. Assoc. Editor: Theodoro Antoun Netto.

J. Offshore Mech. Arct. Eng 141(5), 051601 (Feb 15, 2019) (10 pages) Paper No: OMAE-17-1149; doi: 10.1115/1.4042384 History: Received August 18, 2017; Revised December 19, 2018

This paper aims at assessing the reliability of pipelines with local corrosion defects subjected to external pressure. Several collapse strength models are calibrated and then used to formulate the reliability problem of corroded pipelines. Model uncertainty factors are derived for the various collapse strength models based on available experimental results to better predict the effect of local corrosion defects on the reduction of the collapse strength of pipelines. The model uncertainty factor is defined as function of the depth of the local corrosion defect and calibrates the overconservative predictions of collapse strength models that deal with the effect of corrosion defects by considering a uniform reduction of the pipe thickness. The collapse strength models together with the corresponding model uncertainty factors are then used to formulate the reliability problem of pipelines with local corrosion defects subjected to external pressure. Parametric and sensitivity analyses are performed for different levels of corrosion damages to identify the influence of the various parameters on the collapse probability of corroded pipelines under external pressure. Finally, an approach is suggested to calibrate a design code formulation that is conservative when the minimum pipe thickness is used to represent a local corrosion defect. The approach consists of identifying an equivalent depth of the corrosion defect, corresponding to an intermediate thickness of the corroded pipeline larger than the minimum thickness, that adjusts the design code to match the safety levels of the collapse strength model calibrated to the experimental results.

FIGURES IN THIS ARTICLE
<>
Copyright © 2019 by ASME
Your Session has timed out. Please sign back in to continue.

References

Ahammed, M. , and Melchers, R. E. , 1996, “Reliability Estimation of Pressurised Pipelines Subject to Localised Corrosion Defects,” Int. J. Pressure Vessel Piping, 69(3), pp. 267–72. [CrossRef]
Leira, B. J. , Næss, A. , and Brandrud Næss, O. E. , 2016, “Reliability Analysis of Corroding Pipelines by Enhanced Monte Carlo Simulation,” Int. J. Pressure Vessel Piping, 144, pp. 11–17. [CrossRef]
Teixeira, A. P. , Guedes Soares, C. , Netto, T. A. , and Estefen, S. F. , 2008, “Reliability of Pipelines With Corrosion Defects,” Int. J. Pressure Vessel Piping, 85(4), pp. 228–237. [CrossRef]
Teixeira, A. P. , Zayed, A. , and Guedes Soares, C. , 2010, “Reliability of Pipelines With Non-Uniform Corrosion,” J. Ocean Sh. Technol., 1(1), pp. 12–30. http://www.narosa.com/jrnl_0610.asp
Bisaggio, H. D. C. , and Netto, T. A. , 2015, “Predictive Analyses of the Integrity of Corroded Pipelines Based on Concepts of Structural Reliability and Bayesian Inference,” Mar. Struct., 41, pp. 180–199. [CrossRef]
Aljaroudi, A. , Khan, F. , Akinturk, A. , Haddara, M. , and Thodi, P. , 2015, “Risk Assessment of Offshore Crude Oil Pipeline Failure,” J. Loss Prev. Process Ind., 37, pp. 101–109. [CrossRef]
ASME, 2012, “Manual for Determining the Remaining Strength of Corroded Pipelines,” Supplement to ASME B31 Code for Pressure Piping, American Society of Mechanical Engineers, New York, Standard No. ASME B31G-2012.
Netto, T. A. , Ferraz, U. S. , and Estefen, S. F. , 2005, “The Effect of Corrosion Defects on the Burst Pressure of Pipelines,” J. Constr. Steel Res., 61(8), pp. 1185–1204. [CrossRef]
DNV, 2015, “Recommended Practice—Corroded Pipelines,” Det Norske Veritas, Oslo, Norway.
Hasan, S. , Khan, F. , and Kenny, S. , 2012, “Probability Assessment of Burst Limit State Due to Internal Corrosion,” Int. J. Pressure Vessels Piping, 89, pp. 48–58. [CrossRef]
Palencia, O. G. , Teixeira, A. P. , and Guedes Soares, C. , 2019, “Safety of Pipelines Subjected to Deterioration Processes Modeled Through Dynamic Bayesian Networks,” ASME J. Offshore Mech. Arct. Eng., 141(1), p. 011602. [CrossRef]
Bruschi, R. , Vitali, L. , Marchionni, L. , Parrella, A. , and Mancini, A. , 2015, “Pipe Technology and Installation Equipment for Frontier Deep Water Projects,” Ocean Eng., 108(1), pp. 369–392. [CrossRef]
Timoshenko, S. P. , 1933, “Working Stresses for Columns and Thin-Walled Structures,” Trans. ASME, 55, pp. 173–183.
Bai, Y. , and Hauch, S. , 1998, “Analytical Collapse Capacity of Corroded Pipes,” Eighth International Offshore and Polar Engineering Conference, Montreal, QC, Canada, May 24–29, pp. 182–188. https://www.onepetro.org/conference-paper/ISOPE-I-98-127
Fatt, M. S. H. , 1999, “Elastic-Plastic Collapse of Non-Uniform Cylindrical Shells Subjected to Uniform External Pressure,” Thin-Walled Struct., 35(2), pp. 117–137. [CrossRef]
Netto, T. A. , Ferraz, U. S. , and Botto, A. , 2007, “On the Effect of Corrosion Defects on the Collapse Pressure of Pipelines,” Int. J. Solids Struct., 44(22–23), pp. 7597–7614. [CrossRef]
Timoshenko, S. P. , and Gere, J. M. , 1961, Theory Elastic Stability, McGraw-Hill, New York.
ISO, 2007, “Petroleum and Natural Gas Industries—Equations and Calculations for the Properties of Casing, Tubing, Drill Pipe and Line Pipe Used as Casing or Tubing,” International Organization for Standardization, Geneva, Switzerland, Standard No. ISO/TR 104002007.
Klever, F. J. , and Tamano, T. , 2006, “A New OCTG Strength Equation for Collapse Under Combined Loads,” SPE Drill. Complet., 21(3), pp. 164–179. [CrossRef]
Netto, T. A. , 2009, “On the Effect of Narrow and Long Corrosion Defects on the Collapse Pressure of Pipelines,” Appl. Ocean Res., 31(2), pp. 75–81. [CrossRef]
Netto, T. A. , 2010, “A Simple Procedure for the Prediction of the Collapse Pressure of Pipelines With Narrow and Long Corrosion Defects—Correlation With New Experimental Data,” Appl. Ocean Res., 32(1), pp. 132–134. [CrossRef]
Sakakibara, N. , Kyriakides, S. , and Corona, E. , 2008, “Collapse of Partially Corroded or Worn Pipe Under External Pressure,” Int. J. Mech. Sci., 50(12), pp. 1586–1597. [CrossRef]
Oliveira, N. , Bisaggio, H. , and Netto, T. , 2016, “Probabilistic Analysis of the Collapse Pressure of Corroded Pipelines,” ASME Paper No. OMAE2016-54299.
DNV, 2013, “Submarine Pipeline Systems,” Det Norske Veritas, Oslo, Norway, Standard No. DNV-OS-F101
Melchers, R. E. , 1999, Structural Reliability and Analysis Prediction, 2nd ed., Wiley, Chichester, UK.

Figures

Grahic Jump Location
Fig. 1

Comparison between experimental (measured) [22] and predicted normalized collapse pressures of pipes with defects with constant length and varying depth and width

Grahic Jump Location
Fig. 2

Normalized collapse pressure of the pipes with defects as a function of d/t

Grahic Jump Location
Fig. 3

Normalized collapse pressure of the pipes with defects as a function of normalized defect width c/πD

Grahic Jump Location
Fig. 4

Model uncertainty factor Xc of the collapse strength prediction methods

Grahic Jump Location
Fig. 5

Model uncertainty factor Xc(d/t) of the Netto prediction method as function of the local defect depth (d/t)

Grahic Jump Location
Fig. 6

Model uncertainty factor Xc(d/t) of the DNV prediction method as function of the local defect depth (d/t)

Grahic Jump Location
Fig. 7

Model uncertainty factor Xc(d/t) of the K&T prediction method as function of the local defect depth (d/t)

Grahic Jump Location
Fig. 8

Sensitivity factors—intact pipe (d/t = 0)

Grahic Jump Location
Fig. 9

Sensitivity factors—pipe with corrosion defect (d/t = 0.11)

Grahic Jump Location
Fig. 10

Sensitivity factors—pipe with corrosion defect (d/t = 0.30)

Grahic Jump Location
Fig. 11

Reliability index of the corroded pipe as a function of d/t calculated from the Netto, DNV and K&T LSFs calibrated by the model uncertainty factor Xc (d/t): (a) reliability index of the corroded pipe (βcorr) and (b) reliability index of the corroded pipe (βcorr) normalized by the intact reliability (βo)

Grahic Jump Location
Fig. 12

Equivalent DNV depth of the corrosion defect d' as a function of d/t

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In