What is the maximum temperature that 15CrMoR material can withstand at room temperature?
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During operation, 15CrMoR experienced overheating, with the temperature reaching nearly 700°C while the pressure remained at atmospheric levels. I would like to know what consequences such severe overheating can have What measures need to be taken to inspect the equipment itself, and what is the maximum temperature that this material can withstand? Thank you all!
The national standard specifies only 550°C, which is no problem at normal pressure. 700℃ has reached the temper embrittlement temperature of chromium-molybdenum steel, resulting in two problems. If the over-temperature condition persists for a long time, two issues may arise: high-temperature oxidation, and temper embrittlement. It is recommended to check the hardness of the material once it returns to normal temperature.
15CrMoR: Heat-resistant container steel, belonging to the medium-temperature hydrogen-resistant steel category. At 550℃, the strength is relatively high. According to Baidu, if that’s the case, you should deal with it right away, bro
I’m currently worried about whether any accidents might occur with the equipment under operating temperature and high pressure Can it be done by checking the hardness?
What should the big brother do? It’s the entire set of equipment – please advise me on what to do
550 has been reached; surely at 700 degrees it will have turned red by now.
Weren’t we saying normal pressure? Why is the pressure high again? Tubes can easily burst under such high temperatures and pressures. If it is a pressure vessel, it is recommended to stop and reinspect it.
If it is a brief period of high temperature, operation can be monitored; prompt action should be taken to develop a shutdown plan； If the over-temperature condition persists for an extended period, it is recommended to stop the machine immediately for inspection. A comprehensive physical and chemical analysis of the container as well as its associated piping systems is necessary; hardness and metallographic testing are essential items. The MT range should also be as large as possible. Special attention should be paid to the pressure-bearing fillet welds and T-joints, as well as to the base material of the wall plates that may have been affected by heat stress. All inspections should preferably be carried out on the inner surfaces. If internal wall inspection is not possible, a comprehensive UT scan of the external wall must be conducted. If inspections reveal material degradation caused by overheating, it is best to scrap it as that is the safest option······ Is it really at atmospheric pressure? It’s not very likely, right? Was the temperature exceeded at normal pressure, or has it always been at normal pressure under normal operating conditions? What is a medium? These are all necessary conditions for making a judgment·········
Air entered the catalyst, causing peroxide to lead to overheating