A change in piping material may overlook something else!

A plant decided to change its sulphuric acid piping from Cast Iron to SS. However, they decided to conduct piping design analysis as per code requirement.The analysis found out that design did not adequately consider the difference in cross-sectional thickness between Cast Iron and SS (Cast iron is very thick compared to stainless steel). Also, the heat transfer rates of CI and SS differ. The piping expert redesigned the piping system to account for the thinner cross-section and thermal expansion properties of stainless steel and thus avoided premature failure. 
Read the article in this link.