Hi
you can start at http://en.wikipedia.org/wiki/Oil_refinery , but you really have to be more specific.
Ricardo
Risk Based Inspection - RBI at ISQ
http://pt.linkedin.com/pub/ricardo-costa/b/a50/841
HIC resistant material requirement it is only applicable to carbon steel. Mainly it’s related to the maximum value of sulfur content of the steel. A good carbon steel resistant to HIC must have a sulfur content inferior to 0.002%wt.
Regards
Ricardo Costa