What are the causes of cracking of stainless steel flanges?

The buried cracks in the stainless steel flange further expanded under the test pressure until the stainless steel flange cracked. It is found that the flange forging blank contains more non-metallic inclusions. During the forging process, forging cracks along the inclusions are generated inside the material.These cracks are mostly buried cracks.After machining and forming the stainless steel flange, there are The buried cracks became surface cracks. The flange production plant adopted the method of grinding to eliminate surface cracks, repair welding, and machining again.In this way, even if the surface cracks are eliminated, the internal cracks still exist, so that after a certain stress, the crack propagation is further exacerbated. Until the flange leaks.



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