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Saint Albans, WV, United States

Neely C.,Becht Engineering Co. | Rodery C.,BP Products North America Inc.
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP | Year: 2010

ASME PCC-1 "Guidelines for Pressure Boundary Bolted Joint Assembly" was first published in 2000 [1]. Since that time, there have been advances in bolted joint technology and industry practices that necessitated an update of the original document. The new revision of PCC-1 [2] is over twice the length of the original document and contains many new and updated guidelines. Significant additional detail has been added to the document in an effort to provide the broadest possible array of bolted joint assembly considerations to cover situations commonly encountered in industry, and thereby improve the overall safety and performance of bolted joints. This paper identifies some of the notable changes/additions that are included in the updated document. Copyright © 2010 by ASME. Source


Becht V C.,Becht Engineering Co.
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP | Year: 2010

This paper analyzes waterhammer due to pump transients in pipes containing pockets of non-condensable gases. Solutions ranging between rigid and compressible liquid columns with pressure wave propagation are considered. An energy model is introduced to show if a system is dominated by either rigid or compressible liquid column properties. This "up-front" energy determination results in choosing an efficient formulation for predicting the transient pressure and piping forces for a given system. Example cases are given to demonstrate the solution methods. The effect of different assumptions and parameters are studied. Compressibility of water, gas bubble size, and pump startup are all studied for their effect on the peak pressure reached during a waterhammer event. Copyright © 2009 by ASME. Source


McGill R.O.,Structural Integrity Associates | Antaki G.A.,Becht Engineering Co. | Moenssens M.A.,Westinghouse Electrical Company | Scarth D.A.,Kinectrics Inc.
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP | Year: 2015

ASME Section XI Code Case N-806, for evaluation of metal loss in Class 2 and 3 metallic piping buried in a backfilled trench, was first published in 2012. This Code Case has been prepared by the ASME Section XI Task Group on Evaluation Procedures for Degraded Buried Pipe. The Code Case addresses the nuclear industry need for evaluation procedures and acceptance criteria for the disposition of metal loss that is discovered during the inspection of metallic piping buried in a back-filled trench. A number of additional improvements have been proposed for Code Case N-806. These include expanded guidance for the determination and validation of a corrosion rate and other clarifications to improve ease of use. This paper presents an update of details of the proposed revisions to Code Case N-806 and their technical basis.. Source


Nadarajah C.,Becht Engineering Co.
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP | Year: 2015

Welded full encirclement sleeve repairs are used regularly in petrochemical industries as repairs for piping and pressure vessels. This publication describes a proposed methodology for calculating the stresses on a welded full encirclement sleeve using a simple analytical approximation. The analytical results are compared with finite element results and are found to be in reasonable. © Copyright 2015 by ASME. Source


Stonehouse M.,Becht Engineering Canada Ltd. | Paulin T.,Paulin Research Group | Becht C.,Becht Engineering Co.
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP | Year: 2014

This paper presents the results of a small sample of ASME B16.9 welding tee burst tests. The intent of this study was to make a comparison between what is commonly accepted in industry as a B16.9 welding tee to the burst test requirements of B16.9 paragraph 9. The tests conducted show that the current fabrication techniques and some accepted criteria for B16.9 certification can produce thin sections in the tee which do not meet the required burst test pressures. The test descriptions and results are presented as well as recommendations for future study and potential modifications to the ASME B16.9 standard to address the concerns. Copyright © 2014 by ASME. Source

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