INDUSTRY COMPONENT

Inlet/Outlet Flange

Inlet/Outlet Flange is a standardized mechanical interface component used to connect exhaust fans/blowers to ductwork or piping systems, ensuring secure, leak-proof connections for airflow management.

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Component Specifications

Definition
The Inlet/Outlet Flange is a critical mounting component in exhaust fan and blower systems, designed as a flat, circular, or rectangular plate with precisely drilled bolt holes and a central opening. It serves as the interface between the fan housing and external ductwork, providing structural support, alignment, and sealing through gaskets. Engineered to withstand operational pressures, vibrations, and thermal expansion, it ensures efficient airflow transfer while preventing leaks, backflow, or detachment. Common in industrial ventilation, HVAC, and process systems, flanges are standardized to facilitate installation, maintenance, and compatibility across equipment.
Working Principle
The flange operates by creating a bolted, gasket-sealed joint between the fan housing and ductwork. When bolts are tightened through aligned holes, compressive force is applied, pressing the gasket between flange faces to form a leak-proof seal. This rigid connection maintains structural integrity under dynamic loads (e.g., pressure fluctuations, vibrations), while the central opening allows unimpeded airflow. Standardized dimensions ensure proper alignment and load distribution, preventing misalignment or stress concentrations that could compromise performance.
Materials
Typically made from carbon steel (e.g., ASTM A36, A105), stainless steel (e.g., 304/316 for corrosion resistance), or aluminum (for lightweight applications). Gaskets are often rubber, silicone, or PTFE. Surface finishes may include galvanization or powder coating for durability.
Technical Parameters
  • Pressure Rating PN10 to PN40 (or Class 150 to 300)
  • Flange Thickness 10mm to 30mm
  • Sealing Face Type Raised face (RF), flat face (FF), or ring-type joint (RTJ)
  • Temperature Range -20°C to 400°C (varies by material)
  • Bolt Hole Quantity 4 to 16 holes (depending on size)
  • Bolt Circle Diameter Standardized per flange size (e.g., 100mm to 500mm)
Standards
ISO 7005-1, DIN 2501, ANSI/ASME B16.5, EN 1092-1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Inlet/Outlet Flange.

exhaust fan flange blower flange inlet flange outlet flange industrial flange duct connection ventilation components ISO flange standards Inlet/Outlet Flange Inlet/Outlet Flange in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Exhaust Fan/Blower

A mechanical device that moves air or gases out of an enclosed space to maintain air quality, remove contaminants, or control temperature.

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Exhaust Fan / Blower

A mechanical device that removes moist air, fumes, or contaminants from an enclosed space by creating airflow.

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Baffle Chamber

A chamber within a silencer containing baffles that disrupt and absorb sound waves to reduce noise.

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Engineering Analysis

Risks & Mitigation
  • Leakage due to improper gasket installation
  • Bolt fatigue from vibration
  • Corrosion in humid or chemical environments
  • Misalignment causing airflow restriction
FMEA Triads
Trigger: Incorrect bolt torque or uneven tightening
Failure: Gasket compression failure leading to air leaks
Mitigation: Use calibrated torque wrenches and follow cross-tightening patterns; inspect gaskets regularly.
Trigger: Material corrosion from exposure to moisture or chemicals
Failure: Flange degradation, holes, or structural weakness
Mitigation: Select corrosion-resistant materials (e.g., stainless steel); apply protective coatings; implement routine inspections.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Bolt hole alignment within ±0.5mm; flange flatness within 0.1mm per 100mm diameter; surface finish Ra ≤ 3.2 μm for sealing faces.
Test Method
Pressure testing per ISO 5208 (e.g., hydrostatic or pneumatic tests), visual inspection for defects, dimensional checks with calipers/gauges, and torque verification of bolts.

Buyer Feedback

★★★★☆ 4.7 / 5.0 (37 reviews)

"The technical documentation for this Inlet/Outlet Flange is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Inlet/Outlet Flange so far."

"Testing the Inlet/Outlet Flange now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

What is the difference between an inlet and outlet flange?

Inlet flanges connect to the suction side of the fan (air intake), while outlet flanges connect to the discharge side (air exhaust). They are often identical in design but must be oriented correctly to match airflow direction and system layout.

How do I select the right flange for my exhaust fan?

Match the flange to the fan's port size, pressure rating, and material compatibility. Consider operational temperature, medium (e.g., corrosive gases), and standards (e.g., ISO, DIN). Always use appropriate gaskets and bolts per manufacturer specifications.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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