Duct Section: Temperature Range -20°C to 400°C

Component Specifications

Definition

A duct section is a prefabricated or custom-fabricated segment of an exhaust duct system, designed to form continuous pathways for airflow. It connects various components like hoods, fans, filters, and stacks, ensuring controlled movement of contaminated air. Key parameters include cross-sectional shape (round, rectangular), size, length, and connection method (flanged, slip-and-drive). It must maintain structural integrity under negative pressure, resist corrosion from exhaust gases, and minimize airflow resistance through smooth interior surfaces.

Working Principle

Operates on fluid dynamics principles, where air moves through the duct due to pressure differentials created by exhaust fans. The section provides a sealed conduit to maintain airflow velocity and direction, preventing leakage and ensuring efficient contaminant capture. Laminar or turbulent flow characteristics depend on duct geometry, surface roughness, and airflow rate.

Materials

Galvanized steel (common for general exhaust), stainless steel (for corrosive or high-temperature applications), aluminum (lightweight, corrosion-resistant), or fiberglass-reinforced plastic (FRP for chemical resistance). Thickness typically ranges from 0.6 mm to 1.5 mm, with gaskets (e.g., neoprene) at joints for sealing.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	Standard 1.2 m to 3 m sections
Leakage Class	Class A to D per SMACNA
Surface Finish	Smooth interior, painted or coated exterior
Pressure Rating	-500 Pa to -2500 Pa
Temperature Range	-20°C to 400°C
Diameter/Rectangular Size	100 mm to 2000 mm

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 6947, DIN 24194, SMACNA HVAC Duct Construction Standards

Parent Products

This component is used in the following industrial products

Exhaust Duct

A duct component designed to transport humid air and exhaust gases away from industrial processes.

View Product Details

Engineering Analysis

Risks & Mitigation

Leakage leading to contaminated air escape
Structural collapse under negative pressure
Corrosion from aggressive exhaust gases
Poor airflow efficiency due to improper sizing

FMEA Triads

Trigger: Inadequate sealing at joints
Failure: Air leakage reduces system efficiency and contaminant control
Mitigation: Use certified gaskets, follow SMACNA sealing protocols, conduct pressure tests post-installation

Trigger: Material corrosion from chemical exposure
Failure: Duct degradation, holes, and potential collapse
Mitigation: Select corrosion-resistant materials (e.g., 316L stainless steel), apply protective coatings, implement regular inspection schedules

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±1.5 mm on dimensions, ±2° on angular alignment per ISO 6947

Test Method

Pressure decay test (EN 12237), smoke test for leakage, ultrasonic thickness measurement for corrosion

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Manufacturers of Duct Section

Manufacturer profiles associated with Duct Section.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between a duct section and duct fitting?

A duct section is a straight segment for linear airflow, while fittings (elbows, reducers, tees) change direction or size. Both are essential for complete ductwork assembly.

How do I select material for a duct section?

Choose based on exhaust content: galvanized steel for general use, stainless for corrosive fumes, aluminum for moisture resistance, and FRP for chemical exposure. Consider temperature and pressure requirements.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Duct Section