The Experts below are selected from a list of 192 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.
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.
J.p. Fillo - One of the best experts on this subject based on the ideXlab platform.
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General demographics survey for Hydrostatic test water discharges from natural gas pipelines. Topical report, March-October 1995
1995Co-Authors: J.t. Tallon, J.m. Fankulewski, J.p. FilloAbstract:The report summarizes information regarding the quantity and frequency of water discharged from mainline transmission Hydrostatic Testing of new and existing natural gas pipelines. The research was used to determine the range and distribution of discharge frequency and water volumes associated with Hydrostatic Testing. The information presented in this report was obtained from a survey conducted during the period March through June 1995. Survey data were received from 27 natural gas transmission/distribution companies and two pipeline subsidiaries of major oil/gas producers. A total of 939 Hydrostatic tests were identified or mainline transmission pipeline Testing conducted in 35 states. Survey data were obtained for the period 1989 to 1995, but focus on data provided for the years 1992, 1993, and 1994, with a total of 624 tests reported for these years. Survey responses for the period 1992 to 1994 were averaged to represent typical Hydrostatic Testing practices on an annual basis.
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Treatment of discharge water from Hydrostatic Testing of natural gas pipelines. Volume 4. Topical report, January 1989-June 1992
1992Co-Authors: J.t. Tallon, P.b. Lee-ryan, K.a. Volpi, J.p. FilloAbstract:The report presents results developed from bench- and full-scale treatment Testing conducted on discharge water from Hydrostatic Testing of natural gas pipelines. Bench-scale Testing examined sedimentation with and without chemical coagulants for reducing iron and total suspended solids, aeration for removal of volatile organics, and activated carbon adsorption for removal of organic constituents. Treatment results are provided for a full-scale treatment process, which utilized a hay bale structure and adsorbent booms for removing suspended solids and oil from the discharge water. Detailed characterization results are presented for test water collected before and after treatment. Results developed from an economic analysis of other potential treatment/disposal alternatives are also presented. A total of eight approaches that may be applied for managing constituents present in Hydrostatic test waters are examined. The report is Volume 4 of a five-volume report series.
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Regulations associated with the Hydrostatic Testing of natural gas pipelines. Volume 2. Topical report, May 1992
1992Co-Authors: L.m. Bruderly, T.a. Halapin, J.p. FilloAbstract:The report examines environmental regulatory issues related to the discharge of Hydrostatic test waters generated from the integrity Testing of natural gas pipelines. Hydrostatic Testing, and proper environmental management of discharged waters is required by DOT regulations. However, disposal of water used to conduct a Hydrostatic pipeline test is regulated on a state-by-state basis. State-specific requirements vary widely, ranging from an authorization letter to a complete NPDES permit. In some cases, both federal and state permits must be obtained. Monitoring may be required before and during discharge. While some states have established state-wide discharge limits, the majority of the monitoring requirements are determined on a site-specific basis and can include a variety of parameters. The report is Volume 2 of a 5-volume report series.
R W Revie - One of the best experts on this subject based on the ideXlab platform.
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investigation of plastic zones near scc tips in a pipeline after Hydrostatic Testing
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2008Co-Authors: Jian Li, Mimoun Elboujdaini, R W RevieAbstract:Stress corrosion cracking (SCC) is an important failure mechanism for oil and gas pipelines. In the past, Hydrostatic Testing has been frequently used to assess and mitigate stress corrosion cracking. It is commonly agreed that an effective Hydrostatic test not only eliminates critical crack-like flaws, but also blunts the sub-critical crack tip thereby suppressing further SCC propagation. However, little study has been done on the plastic deformation that results from the high stress intensity at the crack tip due to Hydrostatic Testing pressure and its possible role in subsequent SCC propagation. In this study, microstructural details were examined of an API 5L X52 SCC-containing pipe removed from field service. Plastic deformation generated by the Hydrostatic Testing pressure was revealed by using high-resolution imaging of a focused ion beam (FIB) microscope. The existence of the microscopic plastic zones around some crack tips suggests that caution should be taken when setting up pipeline Hydrostatic tests.
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Effects of Hydrostatic Testing on the Growth of Stress-Corrosion Cracks
Volume 1: Risk Assessment and Management; Emerging Issues and Innovative Projects; Operations and Maintenance; Corrosion and Integrity Management, 1998Co-Authors: Wenyue Zheng, R W Revie, W. R. Tyson, G. Shen, J. E. M. BraidAbstract:Two Hydrostatic tests were carried out on an X-52 (Grade 359) pipe containing sixteen cracks of depths up to 55% wall thickness. Stress corrosion cracking (SCC) growth rates were measured in full-scale tests performed before and after the first hydrotest in order to demonstrate the effects of Hydrostatic Testing on subsequent crack growth rates. The effects on crack tip deformation were investigated by metallographic examination of crack cross-sections immediately following the second hydrotest. The SCC tests were performed using a saw-tooth type load spectrum with the maximum stress set at 95% of the actual (as opposed to specified minimum) yield strength of the linepipe and R = 0.8. During the first hydrotest, the maximum applied stress was 108% of the yield stress; the total hoop strain in the pipe body reached about 0.2%, which is less than would have been reached in a uniaxial tensile test at this stress level because of the effect of the biaxial stress state in the pipe. The highest SCC growth rate measured before the first hydrotest was about 0.88 mm per year (2.4 * 10−3 mm/day), and the growth rate of the same crack after this hydrotest was about 0.37 mm per year (0.79 * 10−3 mm/day). The other cracks all showed varying degrees of reduction in growth rate. Post-mortem examination indicated that the hydrotests did not cause significant crack blunting. The beneficial effects of hydrotests are attributed primarily to the presence of compressive residual stresses in the heavily deformed region in front of the crack tip. The majority of cracks showed some growth during the first hydrotest. SCC growth and growth during the hydrotests are associated with distinctly different microscopic features on the fracture surface.
