Let’s analyze why the tee cracks?
Thread Content
The crack appears in the middle. It was cracked after welding. The crack is relatively long and it basically splits into two halves! Pictures cannot be uploaded. Please briefly analyze whether it is a stress problem or a quality problem! Thank you.
It's best to upload photos of the cracked section to see. There are many reasons for this.
What the poster said is too simple. There are no pictures, no materials, and no welding process, so I can't say anything. The original poster is not a mixed post:lol :lol
It should be a stress issue, the support of the pipeline, whether it is vibrating, etc.
1. Maybe during the tee-making process, the wall thickness was not well controlled and the inspection was not strict. ； 2. There was a problem with the piping, the pipes were overstressed and there was no heat treatment after welding.
In pipelines, stress concentration is likely to occur at tee locations. For some thermally stressed pipes, stress analysis is required to confirm the safety of the piping system. If the design is unreasonable, stress damage at the tee is inevitable. In addition, whether the pipeline is severely eroded (elbows and tees are easy to be damaged), whether the pipe rack is reasonably set, whether there is vibration (especially resonance), whether the quality of the tee is acceptable, whether the construction welding is qualified (unqualified problems usually occur at the weld first), etc. may cause damage to the tee. The poster should conduct a stress analysis based on the actual working conditions of the pipeline and eliminate other factors to confirm whether it is a quality problem with the tee itself.
There is a problem with the welding quality, causing excessive stress concentration in the weld.
Agree with the 3rd floor view: furnace steel ； Beach goods ； Scrap steel recycling ； high carbon steel ； cast steel ； Is it possible to use the wrong welding material? There is no on-site situation, so you can make your own guess!
It should be a quality problem with the tee. The welding quality is easy to spot.
What tee? If it is welded, there should be something wrong with the material.