Large Size Rectangular Metal Bellows Expansion Joint Compensator
DN2000*DN2000
Large size rectangular metal bellows expansion joint compensators are specialized engineered solutions designed primarily for low-pressure, high-temperature ductwork applications. These units are essential for accommodating thermal expansion and contraction in rectangular duct systems while minimizing forces at fixed points. Constructed from high-grade metals such as stainless steel 304, 321, and 316L, these compensators offer excellent durability, corrosion resistance, and long service life. They are typically fabricated from a rectangular corrugated bellows section with two end nozzles or flanges for connection to the ductwork.
Delivery
FOB
minimum order
1 piece
Supply Ability
50piece / Month
Country of Origin
China
Stock Time
30Day
Quantity:
US $1000.00 - US $10000.00 / piece
Key Performance Parameters
These compensators are engineered to perform under demanding conditions. Operating temperatures can reach up to 1068°C on the internal face, with specialized insulation reducing external skin temperatures to approximately 90°C. Pressure ratings typically range from 30 kPa to 4.0 MPa depending on design specifications. The units are capable of absorbing both axial and lateral movements, with single-convolution designs suitable for lower movement requirements and multi-convolution configurations for applications requiring greater displacement absorption.
These compensators are engineered to perform under demanding conditions. Operating temperatures can reach up to 1068°C on the internal face, with specialized insulation reducing external skin temperatures to approximately 90°C. Pressure ratings typically range from 30 kPa to 4.0 MPa depending on design specifications. The units are capable of absorbing both axial and lateral movements, with single-convolution designs suitable for lower movement requirements and multi-convolution configurations for applications requiring greater displacement absorption.
Design Features and Options
Rectangular metal bellows compensators offer extensive design flexibility. Standard rectangular dimensions range from 300×400 mm up to 8080×7100 mm. The bellows can be manufactured with various convolution profiles including U-shaped convolutions with rounded corners, single- or double-miter corner arrangements. For installations requiring significant lateral movement absorption, twin-bellows arrangements can be supplied. Internal flow liners, typically manufactured from high-temperature resistant materials such as 1.4845, can be incorporated to protect the bellows from direct heat exposure, with expansion gaps to accommodate thermal growth and prevent buckling. High-temperature insulation packing can be installed to reduce external heat transfer.
Rectangular metal bellows compensators offer extensive design flexibility. Standard rectangular dimensions range from 300×400 mm up to 8080×7100 mm. The bellows can be manufactured with various convolution profiles including U-shaped convolutions with rounded corners, single- or double-miter corner arrangements. For installations requiring significant lateral movement absorption, twin-bellows arrangements can be supplied. Internal flow liners, typically manufactured from high-temperature resistant materials such as 1.4845, can be incorporated to protect the bellows from direct heat exposure, with expansion gaps to accommodate thermal growth and prevent buckling. High-temperature insulation packing can be installed to reduce external heat transfer.
Material Options and Construction
The primary bellows material is typically stainless steel, while other structural components can be fabricated from carbon steel with specialized coatings or stainless steel depending on environmental requirements. For enhanced corrosion resistance, products can be tailored for acid, alkali, oil, or heat resistance. Exposed carbon steel surfaces can be blast-cleaned and protected with epoxy paint coatings to match surrounding ductwork finishes, with film thickness verification ensuring quality standards. The use of high-grade materials ensures robust construction and outstanding durability in demanding industrial environments.
The primary bellows material is typically stainless steel, while other structural components can be fabricated from carbon steel with specialized coatings or stainless steel depending on environmental requirements. For enhanced corrosion resistance, products can be tailored for acid, alkali, oil, or heat resistance. Exposed carbon steel surfaces can be blast-cleaned and protected with epoxy paint coatings to match surrounding ductwork finishes, with film thickness verification ensuring quality standards. The use of high-grade materials ensures robust construction and outstanding durability in demanding industrial environments.
Applications
These expansion joints are predominantly utilized in power generation facilities, thermoelectric plants, and industrial ductwork systems. Typical applications include:
These expansion joints are predominantly utilized in power generation facilities, thermoelectric plants, and industrial ductwork systems. Typical applications include:
Gas ductwork and exhaust systems
Smoke ducts in power plants
Fan and blower connections (marine, boiler, air conditioning, exhaust fans)
Combustion turbine exhaust systems
High-temperature industrial processing lines
Construction and Installation Considerations
Due to their substantial size, large rectangular compensators are frequently designed and supplied in sections to facilitate safe and cost-effective transportation. Final assembly is completed on-site to ensure proper alignment and installation under actual operating conditions. Temporary shipping bars are welded to the flange edges to brace the unit during transit and prevent deflection. The end pipes can be supplied either with flanges for bolted connections or without flanges for direct welding to the ductwork.
Due to their substantial size, large rectangular compensators are frequently designed and supplied in sections to facilitate safe and cost-effective transportation. Final assembly is completed on-site to ensure proper alignment and installation under actual operating conditions. Temporary shipping bars are welded to the flange edges to brace the unit during transit and prevent deflection. The end pipes can be supplied either with flanges for bolted connections or without flanges for direct welding to the ductwork.
