PeterHerman
Civil/Environmental
- Jan 16, 2007
- 11
We are calculating the remainign service life of a welded steel gas sphere and it seems the methodology is to develop the (1) corrosion rate and then (2) calculate the remaining life using the rate. The corrosion rate is determined by the change in initial thickness minus the actual thickness over time. What I find very conservative is that the initial thickness is, in practice, increased by the maximum permissible variation in fabrication (for me ASTM A20M-06) and this adds about 10 percent. Naturally, this results in a conservative corrosion rate. Is there a more sophisticated way to approach this?