Thin-walled elbows in stainless steel pipe fittings are a common pipe connection component, generally sanitary grade, and the groove generally adopts a flat mouth, which has excellent corrosion resistance and pressure resistance. It is widely used in pipeline systems in chemical, petroleum, natural gas, papermaking and other industries. The bending characteristics of stainless steel thin-walled elbows will be introduced below.
Deformation characteristics of thin-walled elbows during bending:
The deformation of stainless steel elbows during bending is mainly manifested in the following aspects:
First, the inner and outer diameter deformations produced during the bending process are small. Due to stainless steel elbow thin-walled structure, the inner and outer diameters of stainless steel elbow thin-walled elbows will change during the bending process. It has been verified in practice that the inner diameter deformation rate of stainless steel thin-walled elbows is usually controlled within 2%, and the outer diameter deformation rate is usually controlled within 4%.
Secondly, the cross-sectional shape changes produced during the bending process are small. Stainless steel thin-walled elbows are subjected to tensile and compressive forces during the bending process, causing their cross-sectional shape to change. However, due to the excellent performance of stainless steel elbow material, the cross-sectional shape of the stainless steel thin-walled elbow changes little and can maintain a good fluid channel.
The wall thickness changes during the bending process are small. The wall thickness of the stainless steel thin-walled elbow will change during the bending process, but the range of change is relatively small. After process control, the wall thickness change of the stainless steel thin-walled elbow is usually controlled within 10%.
Stress distribution during bending:
During the bending process, the wall of the stainless steel thin-walled elbow is subjected to stress, and its stress distribution characteristics are as follows:
First, the stress concentration area generated during the bending process is 1.5 times the distance from the bending radius. The larger the bending radius of the stainless steel thin-walled elbow, the smaller the distance between the stress concentration area and the bending radius.
Secondly, the stress distribution during the bending process is symmetrical. During the bending process, the stress distribution of the inner and outer diameters of the stainless steel thin-walled elbow is symmetrical. This symmetrical feature can ensure the stability of the pipeline system and the smooth flow of the fluid channel.
The stress change rate during the bending process is large. During the bending process, the stainless steel thin-walled elbow has a large stress change rate due to the action of tensile and compressive forces. In order to ensure the safe operation of the pipeline system, the stress during the bending process must be fully calculated and controlled.
