The Experts below are selected from a list of 33 Experts worldwide ranked by ideXlab platform

Abdul M. Mouea - One of the best experts on this subject based on the ideXlab platform.

  • Reducing Tee COST O? POWER LINBS THROUGH Tee USB O? ALTERNATIVE CONDUCTOR BUNDLE COM?IWRATIONS
    1993
    Co-Authors: Abdul M. Mouea
    Abstract:

    The concept of using two or more conductors per phase for extra high voltage power lines was mainly introduced to control radio interference and audible noise levels by Reducing the magnitude of the electric fields appearing at the surface of the conductors. The number of conductors in the bundle is usually selected as the minimum needed to achieve the above objective. This is done because the cost of building the power line itself increases when the number of conductors in the bundle is incd. This study, on the other hand, shows that the total cost to the utility is lower when the number of conductors in the bundle is increased. The key in the analysis is to take into consideration the power transfer capability of the line and the amount of the required series and shunt compensation. The study shows that other non-monetary benefits also accrue when the number of conductors in the bundle is increased.

  • Reducing Tee cost o power linbs through Tee usb o alternative conductor bundle com iwrations
    1993
    Co-Authors: Abdul M. Mouea
    Abstract:

    The concept of using two or more conductors per phase for extra high voltage power lines was mainly introduced to control radio interference and audible noise levels by Reducing the magnitude of the electric fields appearing at the surface of the conductors. The number of conductors in the bundle is usually selected as the minimum needed to achieve the above objective. This is done because the cost of building the power line itself increases when the number of conductors in the bundle is incd. This study, on the other hand, shows that the total cost to the utility is lower when the number of conductors in the bundle is increased. The key in the analysis is to take into consideration the power transfer capability of the line and the amount of the required series and shunt compensation. The study shows that other non-monetary benefits also accrue when the number of conductors in the bundle is increased.

Cnpc Bohai - One of the best experts on this subject based on the ideXlab platform.

  • X80 DN1200mm Equal/Reducing Tee
    2011
    Co-Authors: Cnpc Bohai
    Abstract:

    Research and development of "X80 DN1200mm Equal/Reducing Tee" is carried out in order to meet the demand for high-grade and largediameter Tee-joints from the Second West-East Pipeline Project and other key ones.Property parameters of the new product are described specially in this paper;its physical properties,forming process and performance testing are also studied therein.Through successful research and development of this product,Julong STeel Pipe Co.,Ltd.has been fully equipped with the competence in technique,process and equipment for mass production of X80 φ1219mm Tees,and thus achieved a historical leap in pipe fittings manufacturing in China.

  • x80 dn1200mm equal Reducing Tee
    Oil Forum, 2011
    Co-Authors: Cnpc Bohai
    Abstract:

    Research and development of "X80 DN1200mm Equal/Reducing Tee" is carried out in order to meet the demand for high-grade and largediameter Tee-joints from the Second West-East Pipeline Project and other key ones.Property parameters of the new product are described specially in this paper;its physical properties,forming process and performance testing are also studied therein.Through successful research and development of this product,Julong STeel Pipe Co.,Ltd.has been fully equipped with the competence in technique,process and equipment for mass production of X80 φ1219mm Tees,and thus achieved a historical leap in pipe fittings manufacturing in China.

Fan Jian-ling - One of the best experts on this subject based on the ideXlab platform.

  • Finite Element Analysis of Extruded Reducing Tee
    Journal of Petrochemical Universities, 2010
    Co-Authors: Fan Jian-ling
    Abstract:

    The calculation and analysis for extruded Reducing Tees subjected to internal pressure were carried out using ANSYS software. The stress distributions law about the Tee were obtained, and verified in combination with the corresponding references. The results show that the fillet radiuses have apparent effects on the Tee strength. A high stress concentration crops up in the corner, and a quadratic curve relation between the maximum stress and inner radius appears when the outer radius was given. Based on the results and related documents, empirical correlation for calculating the maximum stress of the extruded Tee is put forward.

Rajesh Arjunan - One of the best experts on this subject based on the ideXlab platform.

  • Difficulties in Predicting Cycles of Failure Using Finite Element Analysis of Acoustically Induced Vibration (AIV) Problems in Piping Systems
    Volume 3: Design and Analysis, 2014
    Co-Authors: Arindam Ghosh, Yaying Niu, Rajesh Arjunan
    Abstract:

    While finite element modeling analysis is becoming more frequent for analyzing AIV problems, in the absence of experimental data in large diameter pipe, there is no industry wide accepted methodology for representing the pressure excitation for the pipe so accurate cycles to failure may be predicted. The assumptions involved in determining the actual amplitude of the acoustic excitation, which modes may develop and how they couple with the structure all contribute to the overall uncertainty of the problem.Depending on the degree of correlation assumed between the structural and acoustical mode shapes the results vary dramatically. There are also variations based on the number of participating modes assumed. Relative strengths of a Weldolet®, an Insert Weldolet® that is a variation of Sweepolet® and a Reducing Tee connection were analyzed for a 24×6 inch Sch. 10S and STD connection assuming various degrees of correlation and mode participation. Wide fluctuations in the cycles to failure were observed based on the assumptions; however, the stress ratios between the connections are relatively stable. This suggests the use of an acoustic Stress Intensification Factor (SIF) in conjunction with Fatigue Strength Reduction Factors (FSRF) to determine suitability of connections in AIV service rather than an absolute value of cycles to failure.Further investigation of the trends in the value of SIF as the D/d (branch to header diameter) and D/t (diameter to thickness) ratios over a range of pipe diameter are required before these SIF’s could be put into use. Experimental data for a few controlled failure cases are required to ground the finite element prediction in reality. As the experiment is more likely to be conducted with air the possible pitfalls in extending the results from air to commonly used process fluid are also discussed.© 2014 ASME

Arindam Ghosh - One of the best experts on this subject based on the ideXlab platform.

  • Difficulties in Predicting Cycles of Failure Using Finite Element Analysis of Acoustically Induced Vibration (AIV) Problems in Piping Systems
    Volume 3: Design and Analysis, 2014
    Co-Authors: Arindam Ghosh, Yaying Niu, Rajesh Arjunan
    Abstract:

    While finite element modeling analysis is becoming more frequent for analyzing AIV problems, in the absence of experimental data in large diameter pipe, there is no industry wide accepted methodology for representing the pressure excitation for the pipe so accurate cycles to failure may be predicted. The assumptions involved in determining the actual amplitude of the acoustic excitation, which modes may develop and how they couple with the structure all contribute to the overall uncertainty of the problem.Depending on the degree of correlation assumed between the structural and acoustical mode shapes the results vary dramatically. There are also variations based on the number of participating modes assumed. Relative strengths of a Weldolet®, an Insert Weldolet® that is a variation of Sweepolet® and a Reducing Tee connection were analyzed for a 24×6 inch Sch. 10S and STD connection assuming various degrees of correlation and mode participation. Wide fluctuations in the cycles to failure were observed based on the assumptions; however, the stress ratios between the connections are relatively stable. This suggests the use of an acoustic Stress Intensification Factor (SIF) in conjunction with Fatigue Strength Reduction Factors (FSRF) to determine suitability of connections in AIV service rather than an absolute value of cycles to failure.Further investigation of the trends in the value of SIF as the D/d (branch to header diameter) and D/t (diameter to thickness) ratios over a range of pipe diameter are required before these SIF’s could be put into use. Experimental data for a few controlled failure cases are required to ground the finite element prediction in reality. As the experiment is more likely to be conducted with air the possible pitfalls in extending the results from air to commonly used process fluid are also discussed.© 2014 ASME