Large Caliber Rounded Wave Rectangular Metal Compensator
DN200-DN3200
Rectangular metallic expansion joint (rectangular metal bellows compensator) is a flexible connector for rectangular duct systems. It absorbs thermal expansion‑contraction, vibration and foundation settlement displacement, ensures airtight performance. Mainly constructed by multi‑ply stainless steel bellows, flanges/end pipes, optional flow liner and tie rods. Widely applied in power plant flue gas ducts, metallurgy, chemical, cement and ventilation systems for low‑pressure flue gas, dust‑laden gas and coal gas pipelines. Custom sizes, pressure and temperature available.
Delivery
EXW
minimum order
5 pieces
Supply Ability
100pieces / Week
Country of Origin
CHINA
Stock Time
7Day
Quantity:
US $299.00 - US $15999.00 / pieces
A rectangular metallic expansion joint, also called a rectangular compensator or rectangular metal bellows expansion joint, is a flexible connector specifically engineered for rectangular duct and pipe systems to absorb thermal expansion/contraction, mechanical vibration, and foundation settlement - induced displacements, while maintaining system integrity and hermeticity. Below is a professional English introduction covering its core aspects:
Core Structure
- Bellows: The core component, typically made of multi - ply stainless steel (e.g., 304, 316L) or corrosion - resistant alloys, enabling axial, lateral, and angular displacement compensation.
- End Pipes/Flanges: Used for connection to adjacent pipes or equipment; common materials include carbon steel and stainless steel, which should match the system's media and pressure - temperature conditions.
- Optional Flow Liner: Reduces medium scouring on the bellows and extends service life.
- Outer Cover/Tie Rods: Limits excessive displacement and prevents mechanical damage to the bellows.
Working Principle
It relies on the expansion, contraction, and bending of the bellows to absorb axial, lateral, and angular displacements caused by thermal expansion/contraction, mechanical vibration, or foundation settlement in pipelines, ducts, and vessels. It also helps reduce noise and vibration while ensuring airtightness.
Types
| Type Classification | Specific Variants | Key Characteristics |
|---|---|---|
| By Number of Convolutions | Single - convolution, double - convolution, triple - convolution, multi - convolution | More convolutions mean greater compensation capacity |
| By Corner Profile | Right - angle, rounded, W - shape, V - shape | Influences structural rigidity and displacement adaptability |
| By Restraint Type | Unrestrained, restrained (with tie rods/limit bars) | Restrained types control pressure thrust and excessive deflection |
Key Features
- Multi - directional Compensation: Capable of absorbing axial, lateral, and angular movements simultaneously.
- High Fatigue Resistance: Premium stainless - steel bellows offer excellent cyclic durability.
- Reliable Hermeticity: Engineered structure ensures tight sealing even under dynamic loads.
- Low Flow Resistance: Smooth inner wall minimizes medium flow drag.
- Corrosion Resistance: Stainless - steel construction suits diverse corrosive media.
- Customizable Design: Tailored to non - standard duct sizes, pressure, and temperature requirements.
Applications
Widely used in power plant flue - gas ducts, metallurgical sintering flues, chemical process ducts, and building ventilation systems to compensate for displacements in systems conveying low - pressure dust - laden gas, flue gas, coal gas, and other gases. It is a critical component in industries such as power generation, petrochemicals, steelmaking, and cement production.
Installation & Operation Notes
- Verify the model, specifications, and piping configuration meet design requirements before installation.
- For linered joints, align the liner with the medium flow direction; for hinged joints, ensure the hinge rotation plane matches the displacement direction.
- Remove pre - deformation aids only after the entire pipeline system is fully installed.
- Never use bellows deformation to correct pipeline installation deviations.
- Prevent weld spatter from damaging the bellows during installation.
You can send an email to our email address. We will provide catalogue and pictures of our products for your reference.We can also supply pipe fittings, bolt and nut, gaskets etc. We aim to be your piping system solution provider.
b) How can I get some samples?
If you need, we will offer you samples for free, but new customers are expected to pay express charge.
c) Do you provide customized parts?
Yes, you can give us drawings and we will manufacture accordingly.
d) To which country have you supplied your products?
We have supplied to Thailand, China Taiwan, Vietnam, India, South Africa, Sudan, Peru , Brazil, Trinidad and Tobago, Kuwait, Qatar, Sri Lanka, Pakistan, Romania, France, Spain, Germany, Belgium, Ukraine etc. (Figures here only include our customers in latest 5 years.).
e) I can't see the goods or touch the goods, how can I deal with the risk involved?
Our quality management system conforms to the requirement of ISO 9001:2015 verified by DNV. We are absolutely worth your trust. We can accept trial order to enhance mutual trust.
