“Why did they have a Rupture Disc and a Relief Valve together?”
As I alluded to in my post regarding CBS’s update, this arrangement is fairly common but comes with some very SPECIFIC requirements. These requirements can be found in:
- ASME Section VIII, UG-127
- National Board, Part 4, 2.5.4
- API 520, Part II, 9.1
But the top four (4) requirements, we as safety engineers should be looking for in these designs are: