The Experts below are selected from a list of 8133 Experts worldwide ranked by ideXlab platform
Jing Gong - One of the best experts on this subject based on the ideXlab platform.
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a reliability assessment of the Hydrostatic Test of pipeline with 0 8 design factor in the west east china natural gas pipeline iii
Energies, 2018Co-Authors: Lei He, Weichao Yu, Jing GongAbstract:The use of 0.8 design factor in Chinese pipeline industry is a breakthrough with the success of the Test pipe section in the west–east China gas pipeline III. For such a design factor, the traditional P-V (Pressure-Volume) curve based pressure Test control cannot describe the details of the process, and the 0/1 type failure is not an efficient index to show the safety level of the pipeline. In this paper, a reliability based assessment method is proposed to monitor the real-time failure probability of the pipeline during the Hydrostatic Test process. The reliability index can be used as the degree of risk. Following the actual Hydrostatic Testing of a Test pipe section with 0.8 design factor in the west–east China gas pipeline III, reliability analysis was performed using Monte Carlo technique. The basic values of input parameters of the limit state equations are based on the data collected from either the Tested section or the recommended value in the codes. The analysis of limit states, i.e., the yielding deformation and the excessive plastic deformation of pipeline, proceeded based on these distributions. Finally, it is found that the gradually increased water pressure makes the failure probability increase accordingly. A reliability assessment method was proposed and illustrated with the practical pressure Test process.
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A Reliability Assessment of the Hydrostatic Test of Pipeline with 0.8 Design Factor in the West–East China Natural Gas Pipeline III
Energies, 2018Co-Authors: Lei He, Weichao Yu, Jing GongAbstract:The use of 0.8 design factor in Chinese pipeline industry is a breakthrough with the success of the Test pipe section in the west–east China gas pipeline III. For such a design factor, the traditional P-V (Pressure-Volume) curve based pressure Test control cannot describe the details of the process, and the 0/1 type failure is not an efficient index to show the safety level of the pipeline. In this paper, a reliability based assessment method is proposed to monitor the real-time failure probability of the pipeline during the Hydrostatic Test process. The reliability index can be used as the degree of risk. Following the actual Hydrostatic Testing of a Test pipe section with 0.8 design factor in the west–east China gas pipeline III, reliability analysis was performed using Monte Carlo technique. The basic values of input parameters of the limit state equations are based on the data collected from either the Tested section or the recommended value in the codes. The analysis of limit states, i.e., the yielding deformation and the excessive plastic deformation of pipeline, proceeded based on these distributions. Finally, it is found that the gradually increased water pressure makes the failure probability increase accordingly. A reliability assessment method was proposed and illustrated with the practical pressure Test process.
Sumanta Bagui - One of the best experts on this subject based on the ideXlab platform.
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Failure Analysis of a Steam Superheater Tube of a Vacuum Distillation Unit (VDU) in a Petrochemical Industry
Journal of Failure Analysis and Prevention, 2020Co-Authors: Parikshit Munda, Md. Murtuja Husain, Chandra Veer Singh, Sumanta BaguiAbstract:The aim of this investigation is to examine the premature failure of a low-pressure steam superheater tube used in a vacuum distillation unit of a petrochemical industry. Failure of the heater tube occurred in the form of leakages of fluid during the Hydrostatic Test. Visual observation of the failed tube revealed several fine cracks on the outer surface of the tube and localized corrosion pits/cavities on the inner surface of the tube. Chemical composition, hardness and tensile properties of the failed tube conform to the designated standard of ASTM A335 P11 grade of steel. The microstructure of the tube comprises ferrite–pearlite structure without any remarkable microstructural degradation. SEM micrographs of the leaked surface revealed the presence of fatigue cracks generated because of fluctuating thermal stresses experienced due to frequent shutdowns during plant operation. Fatigue cracks were found to originate from the pits/cavities on the inner surface of the tube. Pits/cavities were formed because of localized corrosion due to the presence of excess dissolved oxygen in the water along with S and Cl.
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Failure Analysis of a Steam Superheater Tube of a Vacuum Distillation Unit (VDU) in a Petrochemical Industry
Journal of Failure Analysis and Prevention, 2020Co-Authors: Parikshit Munda, Md. Murtuja Husain, Chandra Veer Singh, Sumanta BaguiAbstract:The aim of this investigation is to examine the premature failure of a low-pressure steam superheater tube used in a vacuum distillation unit of a petrochemical industry. Failure of the heater tube occurred in the form of leakages of fluid during the Hydrostatic Test. Visual observation of the failed tube revealed several fine cracks on the outer surface of the tube and localized corrosion pits/cavities on the inner surface of the tube. Chemical composition, hardness and tensile properties of the failed tube conform to the designated standard of ASTM A335 P11 grade of steel. The microstructure of the tube comprises ferrite–pearlite structure without any remarkable microstructural degradation. SEM micrographs of the leaked surface revealed the presence of fatigue cracks generated because of fluctuating thermal stresses experienced due to frequent shutdowns during plant operation. Fatigue cracks were found to originate from the pits/cavities on the inner surface of the tube. Pits/cavities were formed because of localized corrosion due to the presence of excess dissolved oxygen in the water along with S and Cl.
Lei He - One of the best experts on this subject based on the ideXlab platform.
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a reliability assessment of the Hydrostatic Test of pipeline with 0 8 design factor in the west east china natural gas pipeline iii
Energies, 2018Co-Authors: Lei He, Weichao Yu, Jing GongAbstract:The use of 0.8 design factor in Chinese pipeline industry is a breakthrough with the success of the Test pipe section in the west–east China gas pipeline III. For such a design factor, the traditional P-V (Pressure-Volume) curve based pressure Test control cannot describe the details of the process, and the 0/1 type failure is not an efficient index to show the safety level of the pipeline. In this paper, a reliability based assessment method is proposed to monitor the real-time failure probability of the pipeline during the Hydrostatic Test process. The reliability index can be used as the degree of risk. Following the actual Hydrostatic Testing of a Test pipe section with 0.8 design factor in the west–east China gas pipeline III, reliability analysis was performed using Monte Carlo technique. The basic values of input parameters of the limit state equations are based on the data collected from either the Tested section or the recommended value in the codes. The analysis of limit states, i.e., the yielding deformation and the excessive plastic deformation of pipeline, proceeded based on these distributions. Finally, it is found that the gradually increased water pressure makes the failure probability increase accordingly. A reliability assessment method was proposed and illustrated with the practical pressure Test process.
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A Reliability Assessment of the Hydrostatic Test of Pipeline with 0.8 Design Factor in the West–East China Natural Gas Pipeline III
Energies, 2018Co-Authors: Lei He, Weichao Yu, Jing GongAbstract:The use of 0.8 design factor in Chinese pipeline industry is a breakthrough with the success of the Test pipe section in the west–east China gas pipeline III. For such a design factor, the traditional P-V (Pressure-Volume) curve based pressure Test control cannot describe the details of the process, and the 0/1 type failure is not an efficient index to show the safety level of the pipeline. In this paper, a reliability based assessment method is proposed to monitor the real-time failure probability of the pipeline during the Hydrostatic Test process. The reliability index can be used as the degree of risk. Following the actual Hydrostatic Testing of a Test pipe section with 0.8 design factor in the west–east China gas pipeline III, reliability analysis was performed using Monte Carlo technique. The basic values of input parameters of the limit state equations are based on the data collected from either the Tested section or the recommended value in the codes. The analysis of limit states, i.e., the yielding deformation and the excessive plastic deformation of pipeline, proceeded based on these distributions. Finally, it is found that the gradually increased water pressure makes the failure probability increase accordingly. A reliability assessment method was proposed and illustrated with the practical pressure Test process.
Weichao Yu - One of the best experts on this subject based on the ideXlab platform.
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a reliability assessment of the Hydrostatic Test of pipeline with 0 8 design factor in the west east china natural gas pipeline iii
Energies, 2018Co-Authors: Lei He, Weichao Yu, Jing GongAbstract:The use of 0.8 design factor in Chinese pipeline industry is a breakthrough with the success of the Test pipe section in the west–east China gas pipeline III. For such a design factor, the traditional P-V (Pressure-Volume) curve based pressure Test control cannot describe the details of the process, and the 0/1 type failure is not an efficient index to show the safety level of the pipeline. In this paper, a reliability based assessment method is proposed to monitor the real-time failure probability of the pipeline during the Hydrostatic Test process. The reliability index can be used as the degree of risk. Following the actual Hydrostatic Testing of a Test pipe section with 0.8 design factor in the west–east China gas pipeline III, reliability analysis was performed using Monte Carlo technique. The basic values of input parameters of the limit state equations are based on the data collected from either the Tested section or the recommended value in the codes. The analysis of limit states, i.e., the yielding deformation and the excessive plastic deformation of pipeline, proceeded based on these distributions. Finally, it is found that the gradually increased water pressure makes the failure probability increase accordingly. A reliability assessment method was proposed and illustrated with the practical pressure Test process.
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A Reliability Assessment of the Hydrostatic Test of Pipeline with 0.8 Design Factor in the West–East China Natural Gas Pipeline III
Energies, 2018Co-Authors: Lei He, Weichao Yu, Jing GongAbstract:The use of 0.8 design factor in Chinese pipeline industry is a breakthrough with the success of the Test pipe section in the west–east China gas pipeline III. For such a design factor, the traditional P-V (Pressure-Volume) curve based pressure Test control cannot describe the details of the process, and the 0/1 type failure is not an efficient index to show the safety level of the pipeline. In this paper, a reliability based assessment method is proposed to monitor the real-time failure probability of the pipeline during the Hydrostatic Test process. The reliability index can be used as the degree of risk. Following the actual Hydrostatic Testing of a Test pipe section with 0.8 design factor in the west–east China gas pipeline III, reliability analysis was performed using Monte Carlo technique. The basic values of input parameters of the limit state equations are based on the data collected from either the Tested section or the recommended value in the codes. The analysis of limit states, i.e., the yielding deformation and the excessive plastic deformation of pipeline, proceeded based on these distributions. Finally, it is found that the gradually increased water pressure makes the failure probability increase accordingly. A reliability assessment method was proposed and illustrated with the practical pressure Test process.
Parikshit Munda - One of the best experts on this subject based on the ideXlab platform.
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Failure Analysis of a Steam Superheater Tube of a Vacuum Distillation Unit (VDU) in a Petrochemical Industry
Journal of Failure Analysis and Prevention, 2020Co-Authors: Parikshit Munda, Md. Murtuja Husain, Chandra Veer Singh, Sumanta BaguiAbstract:The aim of this investigation is to examine the premature failure of a low-pressure steam superheater tube used in a vacuum distillation unit of a petrochemical industry. Failure of the heater tube occurred in the form of leakages of fluid during the Hydrostatic Test. Visual observation of the failed tube revealed several fine cracks on the outer surface of the tube and localized corrosion pits/cavities on the inner surface of the tube. Chemical composition, hardness and tensile properties of the failed tube conform to the designated standard of ASTM A335 P11 grade of steel. The microstructure of the tube comprises ferrite–pearlite structure without any remarkable microstructural degradation. SEM micrographs of the leaked surface revealed the presence of fatigue cracks generated because of fluctuating thermal stresses experienced due to frequent shutdowns during plant operation. Fatigue cracks were found to originate from the pits/cavities on the inner surface of the tube. Pits/cavities were formed because of localized corrosion due to the presence of excess dissolved oxygen in the water along with S and Cl.
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Failure Analysis of a Steam Superheater Tube of a Vacuum Distillation Unit (VDU) in a Petrochemical Industry
Journal of Failure Analysis and Prevention, 2020Co-Authors: Parikshit Munda, Md. Murtuja Husain, Chandra Veer Singh, Sumanta BaguiAbstract:The aim of this investigation is to examine the premature failure of a low-pressure steam superheater tube used in a vacuum distillation unit of a petrochemical industry. Failure of the heater tube occurred in the form of leakages of fluid during the Hydrostatic Test. Visual observation of the failed tube revealed several fine cracks on the outer surface of the tube and localized corrosion pits/cavities on the inner surface of the tube. Chemical composition, hardness and tensile properties of the failed tube conform to the designated standard of ASTM A335 P11 grade of steel. The microstructure of the tube comprises ferrite–pearlite structure without any remarkable microstructural degradation. SEM micrographs of the leaked surface revealed the presence of fatigue cracks generated because of fluctuating thermal stresses experienced due to frequent shutdowns during plant operation. Fatigue cracks were found to originate from the pits/cavities on the inner surface of the tube. Pits/cavities were formed because of localized corrosion due to the presence of excess dissolved oxygen in the water along with S and Cl.
