What’s the issue with welded flanges?
Thread Content
The flange ring was welded to the cylinder, and cracking occurred; welding was done in the afternoon, and the cracking was noticed the next day. 1. Looking at the gap after cracking, it seems that the cylinder is clearly not circular; the error is about one or two centimeters. 2. During the design of the ring and cylinder, there are no bevels at the welding areas. 3. Shouldn’t this type of welding be done on both sides? It’s obvious that the ring was welded on only one side. Based on the traces of cleaning the cylinder, it seems to be a welding issue; currently, it is said to be a problem with the flange material. Do anyone have any comments? Can the cause be identified from the photos?
First, the images should be comprehensive; when taking pictures of an elephant’s tusks, start with an overall view of the elephant, then show the location of the tusks, and finally display the texture and shine of their surface. If one simply takes a photo of a certain part of the ivory, the outcome is uncertain and not suitable for discussion. In terms of welding, some involve continuous circumferential welding, where the stress is greatest at the end, and cracking can also occur in materials with special properties. There are many factors; it’s best to describe the issue in full detail to facilitate discussion and for reference.
It’s the flange ring, welded inside the cylinder. It’s just a ring
Well, it’s just a ring that is welded inside the cylinder. This photo shows images of cracks that have formed during welding, images of the ring after it has cracked and been removed, and images of the cylinder section after it has been taken out. Which other one is needed?
Consider the following issues: 1) Based on the materials of the two welded parts and their wall thickness, select the appropriate welding material and welding method (including the choice of groove type)； 2) Surface treatment and environmental conditions prior to welding are met ；
I’ve thought about it – is the situation I mentioned possible?
It probably didn’t undergo heat treatment – preheating before welding, and heat treatment after welding