Roof to Shell Compression Area
Roof to Shell Compression Area
(OP)
When working out the roof to shell compression area as per Figure F-2 API 650 please advise if the shell thickness tc should be including the corrosion allowance. ie if the shell plate thickness is 6mm with a 3mm CA is tc 6mm or 9mm.
Thanks
Thanks





RE: Roof to Shell Compression Area
I cannot find tc defined in API650 either. But I stumbled upon an ASME spec Welded Aluminum-Alloy Storage Tanks B96.1. Figure 21 provides permissible details and participating compression region details, with the same details as API 650. B96.1 clearly defines tc as exclusive of corrosion allowance, I hope that helps.
RE: Roof to Shell Compression Area