What are the specific hangers required for PVC-coated duct in a chemical exhaust system?
3rd YearSpecialty DuctRED · Stop / Verify
You cannot use bare galvanized steel hanger straps, as they will chew through the protective outer coating.
Plain-English answer
You cannot use bare galvanized steel hanger straps, as they will chew through the protective outer coating.
Use PVC-coated or plastic-dipped hanger straps and unistrut trapezes. If those aren't available, wrap the contact points of the pipe with thick structural PVC tape to ensure no bare metal contacts the coated duct skin.
Field checklist
- Stop and verify the approved detail, manufacturer instructions, foreman direction, and project specs before touching it.
- You cannot use bare galvanized steel hanger straps, as they will chew through the protective outer coating.
- Use PVC-coated or plastic-dipped hanger straps and unistrut trapezes. If those aren't available, wrap the contact points of the pipe with thick structural PVC tape to ensure no bare...
Ask Foreman
Hey boss, I’m on specialty duct and need verification before I touch this: What are the specific hangers required for PVC-coated duct in a chemical exhaust system? Do you want me to stop here and check the approved detail, submittal, or inspector/manufacturer requirement first?
Verify before acting
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.