Stainless steel elbows buried in the ground can reduce the area, basically from the climate and the season and other external factors, more importantly, can reduce the heat transfer in the heat loss and prevent the pipe and pipe stainless steel elbow heat deformation.
In order to reduce the heat loss and prevent the deformation of the stainless steel elbow, pipe buried depth should be 1.2 meters or more. (Calculated from the top of the tube). Alpine areas buried depth should be properly deepened. At the same time, the pipeline should be avoided at the groundwater level below. The groundwater level is higher or difficult for other reasons difficult to dig deep, should try to take waterproof and then take the safety measures after the pipe, the conditions are not available, but also take a shallow digging deep, that is, ditch to dig above the groundwater level Ten centimeters, and then according to the provisions of casing, the formation of embankment.
But this will be put into operation after the maintenance of a greater difficulty in order to prevent pipe and stainless steel elbow deformation, to ensure that the casing pressure, shallow digging deep section of the casing thickness should not be less than 1.5 meters.
Drawing and analyzing the hydraulic gradient line will help to study the oil pipeline and stainless steel pipe work after a variety of processes and a variety of conditions under the characteristics. For example, the state of the study graph can be said that when the flow rate is working and the viscosity of the liquid becomes large, the pressure at the end point becomes smaller due to the increase in hydraulic gradient.
We use the steady-state pressure distribution diagram to study the working conditions of the pump station in detail. When the pump station is operated by the “tank” process, the pressure diagram of each section is independent of the operation of the adjacent stainless steel pipe fittings. The pressure at the starting section is determined by the work of the pumping station, and the pressure at the end point is determined only by the level of the liquid in the tank.
However, as we have learned about the pump’s characteristic curve, when the flow increases, the pressure generated by the pump is reduced, so the pressure of the pump will be lower than that of the original working unit, and the stiffness of the stainless steel pipe Will also increase. Pumps and piping characteristics are the methods of combining the characteristic curves, and these methods are used when adjusting. Stainless steel elbow to change the characteristics of the pipeline can be used throttling and reflow method.
At the time of throttling, the pressure loss caused by the hydraulic resistance established by the throttling member in the liquid flow limits the pressure behind the throttling member. When changing the hydraulic resistance, the throttle increases the loss and reduces the resistance to reduce the loss. Since the throttle resistance is placed within the pipe and the stainless steel elbow and is always in the liquid flow, there is always a pressure loss, even when there is no need to limit the pressure.
Therefore, in the use of throttling adjustment, in order to compensate for the loss of throttle devices, oil always have additional energy consumption, usually these losses are 10-15 kPa. That is, in the rated conditions, stainless steel elbow throttling device energy loss of less than 1%.