What are the specific hangers required for PVC-coated duct in a chemical exhaust system?

You cannot use bare galvanized steel hanger straps, as they will chew through the protective outer coating.

['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."]

Stop if

• 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.

Steps

• 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...

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