1. Industrial Heating and Power Generation Systems

• Steam Pipeline Networks
  • Used in power plant main steam pipelines (200–540°C), reheater pipelines, and industrial boiler steam outlets to compensate for thermal expansion (axial displacement ≤300mm, lateral displacement ≤150mm).
  • Example: 600MW thermal power units require rectangular compensators with dimensions up to 4000×2000mm to handle large-diameter steam duct expansion.
• Hot Air and Flue Gas Systems
  • Applied in boiler combustion air ducts (300–900°C), waste incineration flue gas pipelines, and steel mill reheating furnace flues, resisting high-temperature oxidation and thermal shock.

2. Petrochemical and Chemical Industry

• High-Temperature Process Pipelines
  • Installed in catalytic cracking units (500–750°C), reforming furnaces, and ethylene cracking furnaces to compensate for thermal deformation of rectangular process ducts.
  • Corrosion-resistant types (e.g., Hastelloy C-276 linings) are used in sulfuric acid, nitric acid, or chloride media systems.
• Exhaust Gas Treatment Facilities
  • Used in desulfurization and denitrification (FGD) systems of chemical plants, with fluororubber seals and glass fiber linings to resist 120–200°C wet flue gas corrosion.

3. Environmental Protection and Waste Treatment

• Waste Incineration Plants
  • Installed in flue gas ducts (800–1100°C) between incinerators and air preheaters, with multi-layer stainless steel (310S) bellows and ceramic fiber linings to withstand high-temperature particle erosion.
• Dust Collection and Ventilation Systems
  • Applied in baghouse dust collector inlet/outlet ducts (150–300°C) and cement kiln exhaust pipes, with wear-resistant linings (e.g., alumina ceramics) for abrasive dust environments.

4. Building and HVAC Engineering

• Large-Scale Ventilation Systems
  • Used in rectangular air ducts of airports, stadiums, and underground garages (temperature ≤80°C), with lightweight EPDM rubber bellows for noise reduction and vibration absorption.
• District Heating Networks
  • Installed in pre-insulated rectangular steam pipes (150–250°C) of urban heating projects, often combined with guide supports to ensure axial compensation.

5. Metallurgical and Mining Industries

• Iron and Steel Manufacturing
  • Applied in hot blast stove gas pipelines (300–600°C), continuous casting machine cooling water ducts, and sintering machine flue systems, with heat-resistant alloy (Inconel 600) bellows for long-term high-temperature operation.
• Mineral Processing Facilities
  • Used in rectangular ducts of ore drying kilns (200–450°C) and pulverized coal transportation systems, requiring anti-static designs and explosion-proof structures.

6. Special Applications in Aerospace and Nuclear Industry

• Aerospace Ground Support
  • Used in rectangular exhaust ducts of rocket engine test stands (1500–2000°C), with tungsten-alloy reinforced bellows and water-cooling jackets for extreme temperature resistance.
• Nuclear Power Plants
  • Installed in safety-related ventilation ducts (Class 1E) of nuclear power stations, with seismic-resistant designs and radiation-resistant 316L stainless steel materials, meeting ASME Section III standards.

Key Application Parameters and Standards

Selection Guidelines

1. Dimension Matching: Calculate the required length based on the rectangular duct size (width × height) and compensate for thermal expansion using the formula ΔL = α×L×ΔT (α: thermal expansion coefficient).
2. Medium Compatibility: Choose materials (stainless steel, nickel alloys, or coated fabrics) based on corrosion, abrasion, or toxicity of the medium.
3. Installation Space: For limited spaces, use hinged or gimbal-type rectangular compensators to achieve lateral/angular compensation.