Timken Bearings

Question by Mike: How do you work out estimated life span of something?
I know that there are L10 calculations for working out the life span of roller bearings based on all the factors which affect its life.

What sort of calculations should I be doing to work out a life span of a steel structure such as a pressure vessel which may have gradual corrosion and may have fatigue considerations?

Best answer:

Answer by oil field trash
For starters, if the item in question has no corrosion allowance, then it can’t tolerate any reduction in thickness or it will technically be outside of its safe working parameters.

If you know the corrosion rate and the corrosion allowance then the calculaltion is pretty simple.

For fatigue you need to know or make a good estimate of the number of cycles and stress limits for fatigue failure. Below are two of many sites that address this question.

Add your own answer in the comments!

question Josh S : I have a bubble, as if something inside the size of a ball bearing on my lip. What is it? It looks great as it is liquid inside, but I’ve never seen anything like this before best answer. Answer

Sam
Hmm I had something when I was really small. I recommend seeing a doctor about this because I had surgery. It leaves a scar, of course, but I’m serious. You should consult a doctor.