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David Kaye - One of the best experts on this subject based on the ideXlab platform.
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design of reelable bulkheads application of pressure vessel and subsea Pipeline Codes
ASME 2015 34th International Conference on Ocean Offshore and Arctic Engineering, 2015Co-Authors: Soheil Manouchehri, David KayeAbstract:Midline bulkheads are often used as a restraining mechanism in High Pressure / High Temperature (HP / HT) pipe-in-pipe (PIP) systems. Their primary function is to share the loads between the inner and outer pipes and / or to minimize the extent of damage in an operational or installation incident. They can also be used during reeled pipelay to facilitate the reel-to-reel or trip-to-trip weld tie-in. Design of a reeled bulkhead, which is categorized as a “Pipeline component” under DNV-OS-F101, requires the careful adaptation of a Pressure Vessel Code (PVC), a subsea Pipeline code and compliance with the additional requirements of reeling, welding and fabrication. Modern Pipeline Codes, such as DNV-OS-F101, are LRFD based Codes in which different limit states (failure modes) have been formulated and calibrated based on a given probability of failure. The PVCs, however, do not specifically address the Pipeline design and careful consideration in selecting load factors, load combinations and the analysis method are necessary.This paper summarizes a procedure that has been adopted in design of reeled midline bulkheads. The methodology can also be used in design of reeled end bulkheads. Firstly, the initial geometric dimensions of the reelable bulkhead are defined and its reelability is confirmed. Then, appropriate load combinations are identified from ASME BPVC Section VIII – Division 2. Finally, a series of Finite Element Analyses (FEA) are performed to show the fitness-for-service of the bulkhead. The importance of selecting an appropriate and justifiable “code break” is highlighted here.Copyright © 2015 by ASME
Soheil Manouchehri - One of the best experts on this subject based on the ideXlab platform.
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design of reelable bulkheads application of pressure vessel and subsea Pipeline Codes
ASME 2015 34th International Conference on Ocean Offshore and Arctic Engineering, 2015Co-Authors: Soheil Manouchehri, David KayeAbstract:Midline bulkheads are often used as a restraining mechanism in High Pressure / High Temperature (HP / HT) pipe-in-pipe (PIP) systems. Their primary function is to share the loads between the inner and outer pipes and / or to minimize the extent of damage in an operational or installation incident. They can also be used during reeled pipelay to facilitate the reel-to-reel or trip-to-trip weld tie-in. Design of a reeled bulkhead, which is categorized as a “Pipeline component” under DNV-OS-F101, requires the careful adaptation of a Pressure Vessel Code (PVC), a subsea Pipeline code and compliance with the additional requirements of reeling, welding and fabrication. Modern Pipeline Codes, such as DNV-OS-F101, are LRFD based Codes in which different limit states (failure modes) have been formulated and calibrated based on a given probability of failure. The PVCs, however, do not specifically address the Pipeline design and careful consideration in selecting load factors, load combinations and the analysis method are necessary.This paper summarizes a procedure that has been adopted in design of reeled midline bulkheads. The methodology can also be used in design of reeled end bulkheads. Firstly, the initial geometric dimensions of the reelable bulkhead are defined and its reelability is confirmed. Then, appropriate load combinations are identified from ASME BPVC Section VIII – Division 2. Finally, a series of Finite Element Analyses (FEA) are performed to show the fitness-for-service of the bulkhead. The importance of selecting an appropriate and justifiable “code break” is highlighted here.Copyright © 2015 by ASME
Chris Alexander - One of the best experts on this subject based on the ideXlab platform.
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GUIDELINES FOR REPAIRING DAMAGED PipelineS USING COMPOSITE MATERIALS
2020Co-Authors: Chris AlexanderAbstract:ABSTRACT For the past decade there has been relatively wide acceptance in using composite materials to repair damaged has and liquid transmission Pipelines. There have been numerous independent research programs performed by Pipeline companies, research organizations, and manufacturers that have contributed to the acceptance of composites as a legitimate repair material. Additionally, insights have been gained by both Pipeline operators and composite repair manufacturers during field installations. ASME has also responded by adding sections to both the ASME B31.4 and B31.8 Pipeline Codes, as well as currently developing a repair standard for nonmetallic composite repair systems by the Post Construction Committee. The purpose of this paper is to provide for the Pipeline industry guidelines for using composite repair systems to repair Pipelines and what information is needed to properly evaluate how composite materials should be used to repair high pressure Pipelines. The contents of the paper will include discussions on what critical elements should be evaluated for each composite system, items of caution and concern, and the importance of evaluation to ensure safe long-term performance. BACKGROUND AND HISTORY There were three principal driving forces that led to the interest and investment in composite materials in the United States in the mid-1950s and 1960s: the designer's demand for lower weight and higher rigidity for aeroor space structures, electronics, sports equipment, and other applications; the solid-state theory's predictions of extremely high potential crystal strengths, more than one million psi tensile strengths, and elastic modulii of more than 100 million psi; and the flourishing U.S. economy
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state of the art assessment of composite systems used to repair transmission Pipelines
Volume 1: Project Management; Design and Construction; Environmental Issues; GIS Database Development; Innovative Projects and Emerging Issues; Operat, 2006Co-Authors: Chris Alexander, Bob FranciniAbstract:For the past decade there has been relatively wide acceptance in using composite materials to repair damaged gas and liquid transmission Pipelines. There have been numerous independent research programs performed by Pipeline companies, research organizations, and manufacturers that have contributed to the acceptance of composites as a legitimate repair material. Additionally, insights have been gained by both Pipeline operators and composite repair manufacturers during field installations. ASME has also responded by adding sections to both the ASME B31.4 and B31.8 Pipeline Codes, as well as currently developing a repair standard for non-metallic composite repair systems by the Post Construction Committee. Stress Engineering Services, Inc. and Kiefner & Associates, Inc. have been integrally involved in assessing the repair of Pipeline systems, with the former having been involved in performing full-scale testing and analysis on most of the major U.S.-based composite repair systems. The purpose of this paper is to provide for the Pipeline industry a third-party evaluation of composite repair systems and information that is needed to properly evaluate how composite materials should be used to repair high pressure Pipelines. The contents of the paper will include discussions on what critical elements should be evaluated for each composite system, items of caution and concern, and the importance of evaluation to ensure safe long-term performance.Copyright © 2006 by ASME
Bob Francini - One of the best experts on this subject based on the ideXlab platform.
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state of the art assessment of composite systems used to repair transmission Pipelines
Volume 1: Project Management; Design and Construction; Environmental Issues; GIS Database Development; Innovative Projects and Emerging Issues; Operat, 2006Co-Authors: Chris Alexander, Bob FranciniAbstract:For the past decade there has been relatively wide acceptance in using composite materials to repair damaged gas and liquid transmission Pipelines. There have been numerous independent research programs performed by Pipeline companies, research organizations, and manufacturers that have contributed to the acceptance of composites as a legitimate repair material. Additionally, insights have been gained by both Pipeline operators and composite repair manufacturers during field installations. ASME has also responded by adding sections to both the ASME B31.4 and B31.8 Pipeline Codes, as well as currently developing a repair standard for non-metallic composite repair systems by the Post Construction Committee. Stress Engineering Services, Inc. and Kiefner & Associates, Inc. have been integrally involved in assessing the repair of Pipeline systems, with the former having been involved in performing full-scale testing and analysis on most of the major U.S.-based composite repair systems. The purpose of this paper is to provide for the Pipeline industry a third-party evaluation of composite repair systems and information that is needed to properly evaluate how composite materials should be used to repair high pressure Pipelines. The contents of the paper will include discussions on what critical elements should be evaluated for each composite system, items of caution and concern, and the importance of evaluation to ensure safe long-term performance.Copyright © 2006 by ASME
Lovekesh Vig - One of the best experts on this subject based on the ideXlab platform.
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Automatic Information Extraction from Piping and Instrumentation Diagrams
arXiv: Computer Vision and Pattern Recognition, 2019Co-Authors: Rohit Rahul, Shubham Paliwal, Monika Sharma, Lovekesh VigAbstract:One of the most common modes of representing engineering schematics are Piping and Instrumentation diagrams (P&IDs) that describe the layout of an engineering process flow along with the interconnected process equipment. Over the years, P&ID diagrams have been manually generated, scanned and stored as image files. These files need to be digitized for purposes of inventory management and updation, and easy reference to different components of the schematics. There are several challenging vision problems associated with digitizing real world P&ID diagrams. Real world P&IDs come in several different resolutions, and often contain noisy textual information. Extraction of instrumentation information from these diagrams involves accurate detection of symbols that frequently have minute visual differences between them. Identification of Pipelines that may converge and diverge at different points in the image is a further cause for concern. Due to these reasons, to the best of our knowledge, no system has been proposed for end-to-end data extraction from P&ID diagrams. However, with the advent of deep learning and the spectacular successes it has achieved in vision, we hypothesized that it is now possible to re-examine this problem armed with the latest deep learning models. To that end, we present a novel Pipeline for information extraction from P&ID sheets via a combination of traditional vision techniques and state-of-the-art deep learning models to identify and isolate Pipeline Codes, Pipelines, inlets and outlets, and for detecting symbols. This is followed by association of the detected components with the appropriate Pipeline. The extracted Pipeline information is used to populate a tree-like data-structure for capturing the structure of the piping schematics. We evaluated proposed method on a real world dataset of P&ID sheets obtained from an oil firm and have obtained promising results.