List of Articles pipes

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  1 - Introduction and technical and economic evaluation of preparation and installation of GRP pipes
  amene fatehi yaghob zoalfeghary
  The growing trend of construction projects, including water supply and sewerage lines, as well as the willingness of employers and investors to use new technologies requires careful technical evaluation and economics in accepting new materials and technologies before im More

  The growing trend of construction projects, including water supply and sewerage lines, as well as the willingness of employers and investors to use new technologies requires careful technical evaluation and economics in accepting new materials and technologies before implementation, because this can avoid negative risks that lead to costs. One of the new materials that is used in water supply, sewerage and water transmission lines with high acidity has significantly increased GRP pipe, which due to the important characteristics of the pipe index, the position against corrosion, no need for Internal and external coatings and cathode protection and light weight have provided the acceptance of this pipe for a suitable replacement of pipes (steel, concrete, asbestos and diameters larger than 400 mm polyethylene). The cost of drilling and placement of the pipe in the drilling method is higher than the cost of preparing and purchasing the pipe for pipe check due to GRP reinforcement for use in the pipe jacking method is more than the open drilling method. The use of GRP pipes is a very good solution, considering that the country produces special GRP pipes, so the use of trenchless drilling can be economical in reducing the social and environmental problems that we see open drilling. Manuscript profile
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  2 - Investigation of corrosion of metals in oil pipes: a case study of Gachsaran Oil Company
  Omid   Fard ali aram
  Analysis of a dynamic light scattering instrument "Wyatt DynoproNanoStar" was used to detect the accumulation of surfactant in the oil phase. Triple measurements were performed for each sample and at least two samples were tested for each level of surfactant concentrati More

  Analysis of a dynamic light scattering instrument "Wyatt DynoproNanoStar" was used to detect the accumulation of surfactant in the oil phase. Triple measurements were performed for each sample and at least two samples were tested for each level of surfactant concentration to ensure reproducibility. The detection temperature was controlled at the same temperature by segmentation experiments. The accumulation properties of BAC surfactant in toluene were investigated using DLS and samples were presented in Figure 3, including the total radius and intensity of the collected light signal, C12, C14, and toluene C16, from the oil phase in the water-oil partitioning equilibrium from the surface. Net BAC was sampled. As can be seen, both the particle radius and the intensity of the C12 and C14 signals varied sharply within the evaluated concentration range, indicating that C12 and C14 do not form micelles in toluene. In this research, a multi-physical model, integrated corrosion inhibition model (ICI), is presented theoretically and empirically to evaluate integrated water-oil separation, aggregation, adsorption / desorption, and corrosion inhibition of mixed surfactant inhibitors in water-containing oils. We pay salt in Gachsaran Oil Company. Steel Pipe Environments (WOS). The ICI model is based on three main sub-models that consider water-oil surfactant classification, micellation, effective adsorption / desorption on the substrate, surfactant type, surfactant-solvent interactions, surfactant-contrion pair, and side surfactant interactions, etc. opnions have been asked. Acts as a basic framework in the design, selection, optimization, and use of various pure and mixed surfactant inhibitors in WOS environments. In summary, a comprehensive model, the ICI model, has been theoretically developed and empirically validated to evaluate the partitioning, aggregation, and corrosion inhibition of surfactant (both homologous and inhomogeneous) inhibitors (water-containing) and oil-steel pipe. Manuscript profile
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  3 - Modeling the behavior of polymer matrix composite pipes carrying fluid exposed to hydrocarbon fire
  Alireza Rahimi Ehsan Selahi
  Despite the very good mechanical properties of composite materials, the strength of these materials is not suitable for heat resistance. Therefore, due to the increasing use of composite pipes, especially in the oil, gas and petrochemical industries, fire analysis in th More

  Despite the very good mechanical properties of composite materials, the strength of these materials is not suitable for heat resistance. Therefore, due to the increasing use of composite pipes, especially in the oil, gas and petrochemical industries, fire analysis in these pipes is very important. The most important goal of this research was to investigate the effects of fire on the strength of composite pipes and their failure time by performing a numerical thermal-mechanical analysis for a fluid-carrying composite pipe using MATLAB software. At the first step thermal modeling is carried out and heat distribution, due to the hydro carbonian fire, in the composite pipes is determined in terms of the location and time and then in the mechanical modeling stage, the loss of mechanical properties of the composite pipe due to this increase in temperature is calculated and considering the stresses from the fluid inside the pipe as well as thermal stresses have been created, the total stresses have been calculated. This Thermo-Mechanical model has been validated with the results found in valid articles and used to analyze the behavior of a fluid-carrying composite pipe exposed to hydrocarbon fire. Finally, the Tsai–Wu failure theory was employed to determine the failure time of the pipe in the above-mentioned conditions. By estimating the failure time of the composite pipe, it was possible to determine the pressure bearing capacity and failure time of pressurized composite pipes subjected to fire Manuscript profile