There are 4 problems in the forming process of stainless steel seamless elbows:
1. In the tensile deformation zone outside the neutral layer, the large elongation deformation does not exceed the plastic allowable value of the material, resulting in rupture.
2. In the compression deformation zone in the neutral layer of the stainless steel seamless elbow, the structural part subjected to the tangential compressive stress does not exceed instability, resulting in wrinkles.
3. When the stainless steel seamless elbow has a pressure strength requirement, the wall thickness should be controlled to form thinning.
4. When the stainless steel seamless elbow has an ovality requirement, the cross-section should be controlled to produce distortion.