What Code calculations can be done to validate a Trip-Clamp sanitary fitting for CRN registration in Canada? If they don’t have metal-to-metal contact on the outside rim, then they can not be calculated per ASME VIII-1 Appendix-24 (24-1(b)). The only other options for determining MAWP are either a burst test per UG-101(m) or Finite Element Analysis (FEA) per ASME VIII-2, Part 5. Here is a sample FEA report on a Tri-Clamp connection: Sample Trim-Clamp Report (1.2 MB).