Welding Rectangular Metal Bellows Expansion Joint Compensator
DN1000*DN1000
The Welding Rectangular Metal Bellows Expansion Joint Compensator is a highly engineered flexible connector designed to absorb thermal expansion, contraction, and mechanical vibration in large-scale rectangular ducting systems. Manufactured entirely from high-grade metallic materials, this unit is fusion-welded at all interface points to ensure a leak-tight, maintenance-free solution for demanding industrial applications.
Delivery
FOB
minimum order
1 piece
Supply Ability
50piece / Month
Country of Origin
China
Stock Time
30Day
Quantity:
US $500.00 - US $5000.00 / piece
1. Key Design Features
All-Welded Construction: All end connections, edge bars, and the bellows itself are joined via continuous TIG or MIG welding. This eliminates gasketed flanges, reducing the risk of gas or fluid bypass and improving long-term structural integrity under cyclic loading.
All-Welded Construction: All end connections, edge bars, and the bellows itself are joined via continuous TIG or MIG welding. This eliminates gasketed flanges, reducing the risk of gas or fluid bypass and improving long-term structural integrity under cyclic loading.
Rectangular Bellows Profiling: The convolutions are precision-formed to accommodate multi-directional movement while maintaining a constant cross-sectional area. The corners are reinforced to distribute stress evenly and prevent fatigue failure at high-stress concentration points.
Tie-Rod and Limit Rod Options (Optional): For systems with high pressure thrust forces, the compensator can be fitted with external tie-rods or limit rods. These control the movement range, protect the bellows from over-extension, and transmit the pressure thrust directly to the adjacent piping/duct anchors.
2. Available Movement Capabilities
This compensator is engineered to absorb all three directional movements simultaneously, providing maximum flexibility in constrained layouts:
This compensator is engineered to absorb all three directional movements simultaneously, providing maximum flexibility in constrained layouts:
Axial Compression/Extension: Accommodates thermal growth along the longitudinal axis of the duct.
Lateral Deflection: Absorbs offset or parallel misalignment between connected equipment or duct sections.
Angular Rotation: Allows for slight angular deviations, reducing stress on fixed support structures.
3. Material Specifications
To ensure compatibility with various process media and environmental conditions, the compensator can be manufactured from a range of corrosion-resistant alloys:
To ensure compatibility with various process media and environmental conditions, the compensator can be manufactured from a range of corrosion-resistant alloys:
Bellows Element: Available in 304/316L Stainless Steel, Inconel 625, or Hastelloy C-276 for high-temperature oxidation resistance and pitting protection.
End Fittings / Frame: Typically constructed from carbon steel (with optional anti-corrosion coating) or matching stainless steel grades, based on the customer’s system pressure and temperature requirements.
Internal Liners (Optional): Flow liners can be installed internally to reduce turbulence and protect the bellows internal surface from abrasive particle erosion.
4. Performance & Testing Standards
Pressure Rating: Designed for low to medium pressure systems, typically ranging from -0.5 bar to 10 bar (gauge), depending on size and wall thickness.
Pressure Rating: Designed for low to medium pressure systems, typically ranging from -0.5 bar to 10 bar (gauge), depending on size and wall thickness.
Temperature Range: Suitable for cryogenic applications up to +600°C (1112°F) with proper material selection.
Quality Assurance: Every unit undergoes rigorous non-destructive testing (NDT), including dye penetrant inspection of welds, hydrostatic/pneumatic pressure tests, and cyclic fatigue verification to ensure a service life that meets or exceeds ASME and EJMA (Expansion Joint Manufacturers Association) standards.
5. Typical Applications
The rectangular shape and welded ends make this compensator essential in heavy industrial environments where flat oval or rectangular ducts are standard:
The rectangular shape and welded ends make this compensator essential in heavy industrial environments where flat oval or rectangular ducts are standard:
Power Generation: Flue gas desulfurization (FGD) systems, boiler outlet ducts, and turbine exhaust connections.
Cement & Steel Industry: Hot air ducts, kiln inlet/outlet connections, and primary air fans.
HVAC & Marine: Large shipboard ventilation systems and building air-handling units where space is at a premium.
Chemical Processing: Exhaust lines handling corrosive vapors or high-temperature gaseous by-products.
