I have a question regarding the welding of different steel types
Thread Content
The 1.5 million-ton atmospheric pressure plant built in 2010 is now also in operation for six years. But recently, it was found that the pipeline materials used were not up to standard. For example, the body is made of chromium-molybdenum tubing, but the scanning wires and instrument nozzles are made of carbon steel. For example, the pipes are made of stainless steel, while the instrument nozzles and similar components are made of chromium-molybdenum or carbon steel. May I ask: what are the disadvantages of using it this way? What should we do next?
The title and content don’t match; it’s impossible to answer
You can refer to this article: Problems associated with contact and welding of dissimilar steels https://mp.wei*n.qq.com/s/yfN_DPTfJO0cM0WOJ4fwnQ
Bro, it’s hard to tell just by looking; maybe wait for some time to see the results: lol
After prolonged operation, fatigue cracks will appear. Generally, after 15 years. It is recommended to carry out the rectifications gradually: first, address the high-temperature and constant-reduction pipelines, followed by the constant-four, constant-five, reduction-four, and reduction-five pipelines, with all issues resolved during maintenance periods.
Thank you to all the teachers who answered the questions