TinnerFlow™3rd YearPressure TestingYELLOW · Check First
A round joint that pops during testing is a mechanical engagement problem first, sealing problem second. Shut down, inspect overlap/fit/fasteners, then reassemble and seal per the pressure class/project method.
If a spiral/round slip joint blows apart during a leak or pressure test, tape was not the connection. The joint needs proper insertion depth, alignment, fastening, and approved seal method.
Do not just add more foil tape. Check if the joint was barely engaged, wrong coupler, undersized/oversized, missing screws/fasteners, distorted out of round, or under the wrong pressure class. Rebuild it correctly and retest.
Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.