The Experts below are selected from a list of 7200 Experts worldwide ranked by ideXlab platform

Karan Sotoodeh - One of the best experts on this subject based on the ideXlab platform.

  • analysis and improvement of material selection for Process Piping system in offshore industry
    American journal of mechanical engineering, 2018
    Co-Authors: Karan Sotoodeh
    Abstract:

    Material failure mainly because of corrosion is a highly dangerous and expensive phenomenon in the offshore sector of the oil and gas industry, associated with severe negative consequences such as loss of asset, loss of production due to plant shutdown, loss of human life, and health, safety, and environment (HSE) problems (e.g. environmental pollution). Additionally, Piping systems are produced in large numbers for the topside facilities in the oil and gas plants. Thus, the main aim of this paper is to introduce a novel approach for the Piping material selection in the offshore industry to minimize the risk of Piping corrosion and weight reduction with an optimum cost. The central focus of the study is to develop a material selection tool based on a systematic material selection approach and the existing literature, standards, and specifications. In this study, the optimal material selection strategy includes three well-known methods of screening: Cambridge material selector, value engineering (VE), and technique for order preference by similarity to ideal solution (TOPSIS). The proposed guideline is a practical reference for material and Piping engineers in the offshore industry to select the best choice of material for a specific application. The main finding of this research is that 25% chromium super duplex stainless steel is the best choice of material for Processing Piping systems in offshore plants for non-sour Process (hydrocarbon) services. Super duplex stainless steel provides a high corrosion resistance and mechanical strength with the advantage of weight reduction for the selected facilities. A method of Piping cost analysis is introduced to validate super duplex stainless steel as the most economical option.

  • analysis and improvement of material selection for Process Piping system in offshore industry
    American journal of mechanical engineering, 2018
    Co-Authors: Karan Sotoodeh
    Abstract:

    Material failure mainly because of corrosion is a highly dangerous and expensive phenomenon in the offshore sector of the oil and gas industry, associated with severe negative consequences such as loss of asset, loss of production due to plant shutdown, loss of human life, and health, safety, and environment (HSE) problems (e.g. environmental pollution). Additionally, Piping systems are produced in large numbers for the topside facilities in the oil and gas plants. Thus, the main aim of this paper is to introduce a novel approach for the Piping material selection in the offshore industry to minimize the risk of Piping corrosion and weight reduction with an optimum cost. The central focus of the study is to develop a material selection tool based on a systematic material selection approach and the existing literature, standards, and specifications. In this study, the optimal material selection strategy includes three well-known methods of screening: Cambridge material selector, value engineering (VE), and technique for order preference by similarity to ideal solution (TOPSIS). The proposed guideline is a practical reference for material and Piping engineers in the offshore industry to select the best choice of material for a specific application. The main finding of this research is that 25% chromium super duplex stainless steel is the best choice of material for Processing Piping systems in offshore plants for non-sour Process (hydrocarbon) services. Super duplex stainless steel provides a high corrosion resistance and mechanical strength with the advantage of weight reduction for the selected facilities. A method of Piping cost analysis is introduced to validate super duplex stainless steel as the most economical option.

Takashi Ohno - One of the best experts on this subject based on the ideXlab platform.

  • plastic collapse assessment procedure in p m diagram method for pipe bends with a local thin area under combined pressure and out of plane bending moment
    ASME 2012 Pressure Vessels and Piping Conference, 2012
    Co-Authors: Kenji Oyamada, Shinji Konosu, Takashi Ohno
    Abstract:

    Pipe bends are common elements in Piping system such as power or Process Piping, and local thinning are typically occurred on pipe bends due to erosion or corrosion. Therefore, it is important to establish the plastic collapse condition for pipe bends having a local thin area (LTA) under combined internal pressure and external bending moment. In this paper, a simplified plastic collapse assessment procedure in p-M (internal pressure ratio and external bending moment ratio) diagram method for pipe bends with a local thin area simultaneously subjected to internal pressure, p, and external out-of-plane bending moment, M, due to earthquake, etc., is proposed, which is derived from the reference stress. In this paper, only cases of that an LTA is located in the crown of pipe bends are considered. The plastic collapse loads derived from the p-M diagram method are compared with the results of both experiments and FEA for pipe bends of the same size with various configurations of an LTA.Copyright © 2012 by ASME

  • development of a plastic collapse assessment procedure in the p m diagram method for pipe bends with a local thin area under combined internal pressure and external in plane bending moment
    Nuclear Engineering and Design, 2012
    Co-Authors: Kenji Oyamada, Shinji Konosu, Takashi Ohno
    Abstract:

    Abstract Pipe bends are common elements in Piping systems such as power or Process Piping, and local thinning typically occurs on pipe bends due to erosion and/or corrosion. Therefore, it is important to establish the plastic collapse condition for pipe bends having a local thin area (LTA) under combined internal pressure and external bending moment. In this paper, a simplified plastic collapse assessment procedure in the p – M (internal pressure ratio and external bending moment ratio) diagram method for pipe bends with a local thin area simultaneously subjected to internal pressure, p , and external in-plane bending moment, M , due to earthquake, etc., is proposed, which is based on the reference stresses derived from the Tresca theory under a three axes condition. The plastic collapse loads derived from the proposed p – M diagram method are ascertained by comparing with the results of experimental testing with full-scale pipe bends and those of FEA for the same sized pipe bends with an LTA having various dimensions as well.

Johannes S. Vrouwenvelder - One of the best experts on this subject based on the ideXlab platform.

  • Forward osmosis niches in seawater desalination and wastewater reuse
    Water Research, 2014
    Co-Authors: R. Valladares Linares, Sarper Sarp, Sz S. Bucs, Zili Li, Gary L Amy, Johannes S. Vrouwenvelder
    Abstract:

    This review focuses on the present status of forward osmosis (FO) niches in two main areas: seawater desalination and wastewater reuse. Specific applications for desalination and impaired-quality water treatment and reuse are described, as well as the benefits, advantages, challenges, costs and knowledge gaps on FO hybrid systems are discussed. FO can play a role as a bridge to integrate upstream and downstream water treatment Processes, to reduce the energy consumption of the entire desalination or water recovery and reuse Processes, thus achieving a sustainable solution for the water-energy nexus. FO hybrid membrane systems showed to have advantages over traditional membrane Process like high pressure reverse osmosis and nanofiltration for desalination and wastewater treatment: (i) chemical storage and feed water systems may be reduced for capital, operational and maintenance cost, (ii) water quality is improved, (iii) reduced Process Piping costs, (iv) more flexible treatment units, and (v) higher overall sustainability of the desalination and wastewater treatment Process. Nevertheless, major challenges make FO systems not yet a commercially viable technology, the most critical being the development of a high flux membrane, capable of maintaining an elevated salt rejection and a reduced internal concentration polarization effect, and the availability of appropriate draw solutions (cost effective and non-toxic), which can be recirculated via an efficient recovery Process. This review article highlights the features of hybrid FO systems and specifically provides the state-of-the-art applications in the water industry in a novel classification and based on the latest developments toward scaling up these systems.

Cornelius Jacobus Muller - One of the best experts on this subject based on the ideXlab platform.

  • economic hybrid non linear model predictive control of a dual circuit induced draft cooling water system
    Journal of Process Control, 2017
    Co-Authors: Cornelius Jacobus Muller, I K Craig
    Abstract:

    Abstract Petrochemical plants require the addition and removal of energy to and from the Process and the movement of material to, from, and within the Process Piping and vessels. These fundamental mass and energy transfer requirements are typically achieved through the use of Process utilities, which include electricity, steam, fuel gas, cooling water and compressed air. Utilities are responsible for a significant portion of the operating cost of a plant. Therefore, reduction in the consumption of utilities is a common Process optimisation area. The situation is different when it comes to the generation and transportation of these utilities, which are often overlooked with regard to optimisation. In this paper, the potential benefits of utility optimisation are illustrated with particular focus on the generation and transportation areas. The main objectives are reductions in electrical energy consumption and cost and are illustrated for a dual circuit cooling water system. This system is non-linear and also hybrid in the sense that it contains both continuous and discrete input variables, which significantly complicates the design and implementation of control and optimisation solutions. This paper illustrates how the cost and energy consumption of a hybrid system can be reduced through the implementation of hybrid non-linear model predictive control (HNMPC) and economic HNMPC (EHNMPC). The results are compared to that of a base case and an Advanced Regulatory Control (ARC) case, showing that significant additional benefit may be achieved through the implementation of these advanced control and optimisation techniques. The paper further illustrates that additional capital is not necessarily required for the implementation of these techniques.

Kenji Oyamada - One of the best experts on this subject based on the ideXlab platform.

  • plastic collapse assessment procedure in p m diagram method for pipe bends with a local thin area under combined pressure and out of plane bending moment
    ASME 2012 Pressure Vessels and Piping Conference, 2012
    Co-Authors: Kenji Oyamada, Shinji Konosu, Takashi Ohno
    Abstract:

    Pipe bends are common elements in Piping system such as power or Process Piping, and local thinning are typically occurred on pipe bends due to erosion or corrosion. Therefore, it is important to establish the plastic collapse condition for pipe bends having a local thin area (LTA) under combined internal pressure and external bending moment. In this paper, a simplified plastic collapse assessment procedure in p-M (internal pressure ratio and external bending moment ratio) diagram method for pipe bends with a local thin area simultaneously subjected to internal pressure, p, and external out-of-plane bending moment, M, due to earthquake, etc., is proposed, which is derived from the reference stress. In this paper, only cases of that an LTA is located in the crown of pipe bends are considered. The plastic collapse loads derived from the p-M diagram method are compared with the results of both experiments and FEA for pipe bends of the same size with various configurations of an LTA.Copyright © 2012 by ASME

  • development of a plastic collapse assessment procedure in the p m diagram method for pipe bends with a local thin area under combined internal pressure and external in plane bending moment
    Nuclear Engineering and Design, 2012
    Co-Authors: Kenji Oyamada, Shinji Konosu, Takashi Ohno
    Abstract:

    Abstract Pipe bends are common elements in Piping systems such as power or Process Piping, and local thinning typically occurs on pipe bends due to erosion and/or corrosion. Therefore, it is important to establish the plastic collapse condition for pipe bends having a local thin area (LTA) under combined internal pressure and external bending moment. In this paper, a simplified plastic collapse assessment procedure in the p – M (internal pressure ratio and external bending moment ratio) diagram method for pipe bends with a local thin area simultaneously subjected to internal pressure, p , and external in-plane bending moment, M , due to earthquake, etc., is proposed, which is based on the reference stresses derived from the Tresca theory under a three axes condition. The plastic collapse loads derived from the proposed p – M diagram method are ascertained by comparing with the results of experimental testing with full-scale pipe bends and those of FEA for the same sized pipe bends with an LTA having various dimensions as well.