DINKONDA GLOBAL Power Plants Special Underground Unconstrained Internal And External Pressure Corrugated Expansion Joint (Rectangular Metal Compensator)

DINKONDA GLOBAL Power Plants Special Underground Unconstrained Internal And External Pressure Corrugated Expansion Joint (Rectangular Metal Compensator)

Product Overview

The buried unconstrained internal and external pressure corrugated expansion joint (rectangular metal compensator) belongs to the series of rectangular metal corrugated compensator products. The product is designed specifically for buried large section rectangular flues, hot air ducts, and dust removal pipelines. It adopts an unconstrained structure that can absorb the thermal expansion displacement generated by pipeline operation, withstand bidirectional loads of internal and external pressure, and solve the problem of expansion compensation under the combined action of soil external pressure and medium internal pressure of buried pipelines. It is widely used in flue gas, hot air, and dust removal rectangular buried conveying pipelines in industries such as thermal power plants, metallurgy, cement, and garbage incineration. It is used to compensate for the displacement caused by pipeline thermal expansion and contraction, release pipeline thermal stress, and protect pipelines and equipment from thermal deformation and damage.

Structural Composition

1. Rectangular metal corrugated pipe body**
The corrugated body is made of austenitic stainless steel plate formed as a whole, with a multi wave corrugated structure and good elastic deformation ability, used to absorb axial and small lateral displacement. Ripple has excellent fatigue resistance, can repeatedly stretch and deform, and is resistant to corrosion from smoke media and temperature fluctuations.

2. Rectangular flange and pipeline connection frame**
Square steel flange frame, evenly reserved bolt holes on the flange surface for easy welding or bolt fastening with rectangular pipes; The flange has strong rigidity, ensuring sealing and structural stability after installation. The interior of the pipeline is coated with anti-corrosion red paint to enhance the rust and corrosion resistance of the medium side.

3. * * Limit rod assembly**
External configuration includes limit rods and support structures as unconstrained core components. It can limit the excessive stretching and compression of the corrugated pipe, absorb pressure thrust, and not transmit internal pressure thrust to the equipment at both ends, achieving unconstrained design; Prevent damage to corrugated pipes due to excessive displacement under buried conditions.

4. * * Draft tube**
Install a metal guide tube internally to reduce the direct erosion of the corrugated pipe by high-speed flow of the medium, minimize turbulence and wear, protect the ripples, and reduce fluid resistance.

5. * * External protective structure (buried only)**
The external supporting pressure bearing protective shell can resist the external pressure generated by soil backfilling, isolate the mechanical scratches of soil sand and gravel on the corrugated pipe, adapt to underground burial conditions, and prevent damage to the expansion joint during backfilling construction.

Core Features

1. Unrestricted structure, offsetting internal pressure thrust**
Unrestricted design, the pressure thrust generated by the pipeline medium is borne by the limit structure itself, and the thrust will not be transmitted to the back-end equipment such as boilers and dust collectors, greatly reducing the thrust load borne by pipeline supports and equipment, simplifying the design of pipeline support, which is the core advantage of buried pipelines.

2. * * Compatible with internal and external pressure, suitable for buried working conditions**
Simultaneously bearing the internal pressure of the medium and the external pressure of the backfill soil, specifically developed for buried rectangular flue gas ducts; The outer protective shell resists soil compression and sand and gravel friction, while the corrugated pipe compensates for thermal displacement, solving the shortcoming of ordinary compensators that cannot withstand external soil pressure.

3. * * Rectangular large cross-section, suitable for high flow media in flue gas ducts**
The rectangular large-diameter structure meets the requirements of high flow transportation of flue gas and hot air. Compared with circular compensators, it is more suitable for rectangular flue gas pipeline renovation and new construction projects, reducing pipeline diameter changes and lowering fluid resistance.

4. * * Excellent temperature and corrosion resistance, suitable for flue gas media**
The corrugated pipe is made of stainless steel material, which is resistant to high temperatures and corrosion by trace sulfur oxides in flue gas; Internal anti-corrosion coating, delaying corrosion on the medium side, suitable for media such as boiler flue gas, kiln hot air, and dust removal exhaust gas.

5. Strong displacement compensation capability**
Absorb mainly axial displacement with a small amount of lateral displacement, release the thermal stress generated by temperature changes in the pipeline, and avoid thermal expansion, deformation, tearing, and support damage of the pipeline.

6. * * Customizable production**
The cross-sectional size, number of ripples, material, pressure rating, and temperature resistance range can all be customized according to the project drawings, adapting to the burial depth, medium temperature, and pressure parameters of different projects.

Technical Parameters

-Product Name: Underground unconstrained internal and external pressure corrugated expansion joint (rectangular metal compensator)
-Structural form: unconstrained rectangular corrugated compensator
-Bellows material: 304/316L stainless steel (optional)
-Connection method: flange connection/welding connection
-Applicable media: boiler flue gas, hot air, dust removal exhaust gas, industrial high-temperature gas
-Compensation displacement: mainly axial displacement, can absorb a small amount of lateral displacement
-Working condition characteristics: able to withstand internal pressure of the medium+external pressure of the soil, suitable for underground laying
-Applicable temperature range: normal temperature~600 ℃ (optional according to material)
-Protection: Internal guide tube, external buried pressure bearing protective shell
-Processing method: Customized production according to project size

FAQ:
Q1.What about the lead time?
A: 5-7 days for Sample preparing ,15-20 working days for mass production.

Q2. Is it OK to print my logo on led light product?
A: Yes. Please inform us formally before our production.

Q3: Do you offer guarantee for the products?
A: Yes, we offer 1 years warranty to our products.

Q4: How to deal with the faulty?
A: Firstly, Our products are produced in strict quality control system and the defective rate will be less than 0.2%.

Secondly, during the guarantee period, we will send new lights with new order for small quantity. For defective batch products, we will repair them and resend them to you or we can discuss the solution including re-call according to real situation.

Company Profile

DINKONDA GLOBAL has been developing and supplying equipment and components for specialized thermal power plants and related industries for 20 years and is one of the a market-leading global manufacturers and providers in the industry. We have a professional technical research and development team, professional management talents and dozens of quality inspection personnel. The company has more than 50 CNC machining centers, CNC lathes, various inspection equipment and other professional equipments.
Our comprehensive product portfolio and over 20 years of industry knowledge mean customers can rely on us to deliver innovative, reliable and economic products. Chenglei products are designed and manufactured with quality components and clear user interfaces for quick and safe operation in the field. Our strict product development and testing ensures long-lasting performance and continued reliability. Our independently developed and produced CL series valve electric actuators are widely used in various industries such as Oil & Gas, Water & Power, and Chemical, Process & Industrial .
Customers rely on us for innovative, high quality and dependable products for managing the flow of liquids, gases and powders. We help customers around the world to reduce emissions, improve efficiency, minimize their environmental impact and assure safety.