Not identifying pressure class before sealing method
Pressure class and seal class decide what needs sealed and how. If you do not know the seal class, ask before choosing a product.
Stop if
- What seal class/pressure class applies here, and do we need mastic, tape, fabric reinforcement, or another approved method?
Watch out
- Do not choose a seal method before identifying the system requirement.
Check
- Find the duct system/pressure label if shown.
- Ask where the seal class or sealing requirement is listed.
- Verify transverse joints, longitudinal seams, penetrations, and connections.
- Confirm if fabric-reinforced mastic is required.
- Use the approved method only after verification.
Steps
- Find the duct system/pressure label if shown.
- Ask where the seal class or sealing requirement is listed.
- Verify transverse joints, longitudinal seams, penetrations, and connections.
- Confirm if fabric-reinforced mastic is required.
- Use the approved method only after verification.
Say this to your foreman
What seal class/pressure class applies here, and do we need mastic, tape, fabric reinforcement, or another approved method?
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