Inspectioneering

Amin Muhammed: About the Author
TWI

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Published Articles

  • Avoiding PWHT - Can It Be Justified?
    May/June 2005 Inspectioneering Journal

    <p>Current BSI and ASME codes for the construction of pressure vessels, boilers and piping specify that post-weld heat treatment is required if the thickness of the components being welded exceeds a specified value. This value depends on the type of material being used, and varies from code to code. An alternative procedure is available for deciding whether or not PWHT is necessary to avoid the risk of failure by fracture. This involves conducting a fracture mechanics assessment using procedures such as those in BSI 7910, or API 579. The use of these procedures is permitted in the British pressure vessel standard BS PD 5500:2003.</p>


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