Choose different bending radius according to your craft. Generally, choose 1.5D. Special cases also use 5D and 10d elbow. Using 1D elbow: 1. 1D elbow is used without special pressure drop and fluid flow requirements. 2。 In the case of outer sleeve, 1D elbow is often used. The inner pipe uses 1.5D elbow to cooperate with the outer pipe 1D elbow, so that the inner pipe can be smoothly inserted into the outer pipe, reducing the construction difficulty. 3。 1D elbows may be used to reduce piping vibration. Using 1D elbow can increase the rigidity of the whole pipe. When 1.5D elbow is used: 1. Reduce pipeline stress. The use of long radius elbows can increase the flexibility of the pipe. In the design process of some heat medium oil pipelines, we will also use 3D, 4D elbows instead of pipeline compensators. 2。 Reduce the pressure drop in the pipeline. The equivalent length values of 1D elbow and 1.5D elbow in the calculation of pressure drop are different, but the difference is not big. However, if there are many elbows in the whole pipeline system, there are still some adjustment effects. 3。 Reduce the pulsating force of fluid on the pipeline. The larger the radius of curvature of elbow, the less the dynamic load of fluid on pipe system.
