What Pressure Class Means
Building light-class duct on a high-class run; seal/support fails
Stop if
- What pressure class is this section and where does it step down?
Watch out
- Assume all supply is the same class
Check
- Which pressure class the run is, positive or negative, and where it changes
Steps
- Which pressure class the run is, positive or negative, and where it changes
Say this to your foreman
What pressure class is this section and where does it step down?
More in Joints, TDC, Flanges & Connections