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ASME STP/PT-028
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ASME STP/PT-028 2009 Edition, January 29, 2009 IMPACT TESTING EXEMPTION CURVES FOR LOW TEMPERATURE OPERATION OF PRESSURE PIPING
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Description / Abstract:
INTRODUCTION
This study investigated the impact test exemption curves of ASME Section VIII, UCS-66, with the objective of extending them to thicknesses representative of piping components. Specifically, the purposes of the investigation included:
This study investigated the impact test exemption curves of ASME Section VIII, UCS-66, with the objective of extending them to thicknesses representative of piping components. Specifically, the purposes of the investigation included:
- Extension of the curves (particularly Curves for material groups A and B) to lower temperatures and to thicknesses less than 0.394 inches
- To understand the technical and historical origin of these curves
- To expand in a more systematic and complete way the several exceptions to these curves, namely UCS-66(d) and UG-20(f)
- Evaluation of data and history in light of modern steel production methods, which produce materials that are less prone to low temperature failures.