NDLI: New Limit State Functions for Determining the Puncture Resistance to External Force

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Liu, Jianhui Francis, Andrew
Copyright Year	2002
Abstract	Traditionally, a key component of the design philosophy applied to high-pressure pipelines has been the stipulation that the nominal hoop stress is less than some fraction of the specified minimum yield strength (SMYS). However, more recently both designers and operators have recognised that whilst this approach generally leads to conservatively safe designs, there may be some situations in which the conservatism is not adequate. This has resulted in a move towards limit state, and structural reliability based, methods that address actual failure modes, and consequently the contributions to structural integrity of other factors in addition to stress. One such failure mode is the puncture of a pipeline wall due an external force. This situation can arise from the impact of excavating machinery for onshore pipelines or drop objects and anchors for offshore lines. A limit state function describing this failure mode is given in DNV guidelines No 13. However, this function does not take account of the internal pressure. In this paper the influence of pressure on the pipeline indentation is addressed using both theoretical and finite element analyses. A closed-form solution of force-deformation relationship based on a consideration of rigid-plastic deformation theory, that gives a good agreement with results from both FE analyses and experimental tests, is presented. The analytical results show that indentation force, and the maximum stress/strain, required to produce a given dent depth, increase with increasing internal pressure. However, the relationship between indentation force and maximum stress/strain is not sensitive to internal pressure. The analysis therefore shows that an indentation force criterion governed solely by the dent depth, such as that given in DNV guidelines No. 13, may be highly unconservative when the pressure in the pipeline is high. Consequently, a new local denting criterion for puncture of pressurised pipes, which is based the maximum acceptable strain of the pipe material, and thereby removes the above unconservatsim, has been proposed and is presented in this paper.
Sponsorship	Ocean, Offshore, and Arctic Engineering Division
Starting Page	25
Ending Page	32
Page Count	8
File Format	PDF
ISBN	0791836142
DOI	10.1115/OMAE2002-28029
e-ISBN	0791835995
Volume Number	21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 4
Conference Proceedings	ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering
Language	English
Publisher Date	2002-06-23
Publisher Place	Oslo, Norway
Access Restriction	Subscribed
Subject Keyword	Deformation Pipelines Machinery Pressure Stress Design High pressure (physics) Ocean engineering Yield strength Hoop stress Finite element analysis Reliability Pipes Failure mechanisms
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Reliability-Based Limit States Design for Onshore Pipelines

Surface Stress Analysis of Internally Corroded Pipes Under External Pressure

Strength and Deformation Capacity of Corroded Pipes: The Joint Industry Project

A Numerical Lab to Predict the Strength Capacity of Offshore Pipelines

Deformation-Based Behavior of X65 Gas Pipeline in Rectangular Concrete Encasement

Structural Design Capacity of X120 Linepipe

HotPipe JI Project: Experimental Test and FE Analyses

Effect of Installation on Collapse Performance of Flexible Pipes

Qualification of an Application System for In-Field External Reinforcement of Pipelines Using Helical Steel Wrap

New Limit State Functions for Determining the Puncture Resistance to External Force

Similar Documents

Reliability-Based Limit States Design for Onshore Pipelines

Surface Stress Analysis of Internally Corroded Pipes Under External Pressure

Strength and Deformation Capacity of Corroded Pipes: The Joint Industry Project

A Numerical Lab to Predict the Strength Capacity of Offshore Pipelines

Deformation-Based Behavior of X65 Gas Pipeline in Rectangular Concrete Encasement

Structural Design Capacity of X120 Linepipe

HotPipe JI Project: Experimental Test and FE Analyses

Effect of Installation on Collapse Performance of Flexible Pipes

Qualification of an Application System for In-Field External Reinforcement of Pipelines Using Helical Steel Wrap

New Limit State Functions for Determining the Puncture Resistance to External Force