Key Takeaways Duct wall thickness is an engineering output, not a catalog value. Duct wall thickness is the measured thickness of the duct wall: metal ductwork reads it from gauge tables, while plastic ductwork derives it from diameter, vacuum, temperature, media, grade and joints. Start from the diameter table, then correct for duty. Published diameter-to-wall…
Air duct design principles for industrial exhaust: airflow balance, pressure drop and noise checks, equivalent-diameter conversion, and a worked example.
Compare PP, PVC and metal ducting by chemical duty, ignition exposure, mechanical design and evidence. Use the RFQ checklist to separate UL 94 material claims from fire-rated or smoke-control system requirements.
PP duct vs galvanized duct: screen chemistry, condensation, temperature, construction, joints, and RFQ scope before choosing a reviewable exhaust system.
PP vs PVC pipe: continuous 60 °C vs 80 °C, two-way chemical resistance, stiffness vs weight, solvent cement vs welding, honest life-cycle cost.
Plastic flame retardant grades V-0, V-1, V-2, HB: what they mean, the exact UL 94 test criteria, and what to verify before ordering duct.
How PP plastic duct is made: pellets are extruded into straight pipe, then hot gas or extrusion welding joins fittings and seams. DVS weld parameters included.
Industrial PP duct insulation and sealing: use the dew-point check to decide, pick R-value and thickness, and specify a SMACNA seal class with leakage testing.
How to specify a custom PP duct: what sizes and tolerances you can set, when custom beats catalog, and what to include in an OEM duct inquiry.
Verify PP duct quality before you buy: check ISO 9001 certificates, read SGS reports, sample key parameters, and add pre-shipment inspection to your order.
