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Analysis of Unburied Pipeline Spans

ABSTRACT: Support requirements for unburied spans on existing pipelines can be difficult to assess. An approach for investigating the adequacy of support of unburied spans is presented. It begins with a screening based on theoretical longitudinal stress evaluation.  An estimate...

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24
Sep 2012

Rational Stress Limits and Load Factors for Finite Element Analyses in Pipeline Applications Part II – Limit State Load Factor Development

ABSTRACT: In this paper, a load factor for use in a limit-load analysis of a pipeline and its      components is established. The load factor is based on the ASME pipeline Code’s design margin for the service and location of the installation . These...

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24
Sep 2012

Elevated Temperature Primary Load Design Method Using Pseudo Elastic-Perfectly Plastic Model

ABSTRACT: A new primary load design method for elevated temperature service has been developed. Codification of the procedure in an ASME Boiler and Pressure Vessel Code, Section III Code Case is being pursued. The proposed primary load design method is intended to provide the same...

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16
Sep 2012

One Power Plant’s Experience in Setting Up, Performing and Acting on a Pipe Hanger Surveillance Program

 ABSTRACT: The ASME B31.1 Power Piping Code, Chapter VII, has stated that Operating Companies shall establish a program to assess and document the condition of their Covered Piping Systems (CPS) especially those that operate in the creep range.  This includes maintaining...

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30
Jul 2012

Using Singularities to Detect and Describe a Notch in a Pipe

ABSTRACT: A hybrid Semi-Analytical Finite Element (SAFE) and standard finite element procedure is adopted to locally detect and characterize an outer surface breaking, axisymmetric notch in an otherwise infinitely long steel pipe.  Numerical simulations demonstrate that...

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15
Jul 2012