DN200 Dual Sleeve Pipe

DN200 Dual Sleeve Pipe

Dn200 dual sleeve pipe offers superior abrasion resistance and corrosion protection with a ceramic-lined, double-walled design, ensuring durability in harsh industrial applications.

DN200 Dual Sleeve Pipe

Dn200 dual sleeve pipe offers superior abrasion resistance and corrosion protection with a ceramic-lined, double-walled design, ensuring durability in harsh industrial applications.

The DN200 Dual Sleeve Pipe is a high-performance piping solution designed for industrial applications requiring exceptional abrasion resistance and corrosion protection. With a nominal diameter of 200 mm (DN200), this dual sleeve pipe features a double-walled construction: an outer steel shell for structural integrity and an inner ceramic lining, typically made of high-purity alumina (Al₂O₃) or silicon carbide (SiC). This combination makes it ideal for handling abrasive and corrosive materials in industries such as mining, power generation, cement production, chemical processing, and pneumatic conveying systems.

The ceramic lining, with a Mohs hardness of 8-9 or Vickers hardness of HV1100-1500, provides 10-20 times the wear resistance of standard carbon steel pipes. This ensures the DN200 Dual Sleeve Pipe can withstand the erosive effects of abrasive materials like coal, ash, slurries, or cement clinker, commonly transported in industrial piping systems. The seamless ceramic lining, such as G 2T® or CER-500, minimizes wear points and prevents clogging, while tiled linings with pre-engineered alumina tiles accommodate complex pipe geometries, ensuring versatility for various applications.

In addition to abrasion resistance, the ceramic lining offers robust corrosion protection, resisting harsh chemicals and high temperatures up to 2200°F (1200°C). This makes the dual sleeve pipe suitable for corrosive environments, such as chemical plants or boiler systems handling flue gas and ash. The double-walled design also provides thermal insulation, reducing heat loss and enhancing energy efficiency in high-temperature processes.

The structure of a double-jacket pipe consists of a large outer pipe which houses a smaller inner pipe. Specifically, the inner pipe has regularly spaced openings. The principle behind double-jacketed pipes is to use them in pneumatic conveying systems, particularly in horizontal pipelines, to effectively prevent blockages. This prevention mechanism is due to the unique structure of the double sleeve pipe. As the ash-air mixture flows through the pipe, dry ash deposits gradually accumulate inside the pipe for various reasons, leading to blockages. When dry ash begins to accumulate and threatens to block, compressed air is passed through the small pipe. By passing through the openings and orifices on the small pipe, the compressed air disturbs the obstructed areas, gradually dislodging the accumulated dry ash. This action helps to prevent clogging of the conveying pipe.
30%
Higher Efficiency

Compared to conventional systems

2000m
Conveying Distance

Maximum transport range

10+
Years Service Life

Extended operational lifespan

98%
System Availability

Reliable operation uptime

What is Turbulent Flow Double-walled Pipe

What is Turbulent Flow Double-walled Pipe?

Turbulent Flow Double-walled Pipe represents a revolutionary advancement in pneumatic conveying technology, specifically engineered to address the critical challenges of material blockage, wear resistance, and energy efficiency in industrial bulk material transportation systems.

Anti-blocking Technology

Intelligent air injection system automatically detects potential blockage conditions and responds with targeted air bursts to dislodge accumulated material.

Enhanced Heat Transfer

Turbulent flow creates chaotic fluid movement with rapid changes in velocity and direction, resulting in superior mixing and heat transfer performance.

Dual-tube Configuration

Inner auxiliary air pipe strategically positioned within the main conveying pipeline, equipped with precisely engineered nozzles and throttle orifices.

Technical Specifications

These technical specifications outline the dimensions, materials, and performance parameters of our Turbulent Flow Double-walled Pipe & Sleeve System.

Dimensional Specifications
Parameter Specification
Outer Pipe Diameter 50mm – 300mm (2" – 12")
Inner Pipe Diameter 10mm – 45mm (0.4" – 1.8")
Wall Thickness (Outer) 3mm – 12mm
Wall Thickness (Inner) 2mm – 6mm
Standard Lengths 3m, 6m, 12m
Custom Lengths Up to 18m
Performance Parameters
Parameter Specification
Conveying Velocity 2–5 m/s (starting velocity)
Maximum Velocity 15 m/s
Solid-to-Gas Ratio 50–100 kg/kg
Conveying Distance Up to 2000+ meters
Operating Pressure 0.5–6 bar gauge
Temperature Range –20°C to 400°C
Material Options
Category Available Grades / Types
Carbon Steel ASTM A53, ASTM A106, API 5L
Stainless Steel 304, 316, 321, 347, Duplex grades
Alloy Steel Chrome-Molybdenum, Inconel, Hastelloy
Specialized Coatings Ceramic Lining, Polymer Coating, Rubber Lining

Key Benefits

Energy Efficiency

30–50% reduction in energy consumption compared to conventional systems due to lower conveying velocities and higher material loading ratios.

Reduced Maintenance

60–80% reduction in maintenance costs due to elimination of blockage-related downtime and reduced wear rates from low-velocity operation.

Extended Service Life

10–15 years service life expectation compared to 3–5 years for conventional systems, with pipe wear rates below 0.1mm/year.

Improved Reliability

98–99.5% system availability with blockage incidents less than 0.1% of operating time, enabling continuous production.

Cost Effectiveness

1–3 year payback period with 35–50% IRR, providing substantial long-term value through reduced operating costs.

Operational Flexibility

Start/stop capability without blockages, modular operation, and fully automated program control for enhanced operational flexibility.

Industrial Applications

Engineered for durability, our products support critical operations in energy, cement, chemical, and food sectors.

Power Generation

Coal handling, fly ash removal, limestone injection systems, and biomass fuel transport in power plants.

Cement Industry

Raw material transport, cement powder handling, kiln dust collection, and finished product loading systems.

Chemical Processing

Catalyst transport, polymer powder handling, chemical intermediate transport, and hazardous material containment.

Food & Pharmaceutical

Flour transport, pharmaceutical powder handling, vitamin distribution, and nutritional supplement processing.

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