Super Duplex Stainless Steel + Spiral Structure: A Reliable Solution for Corrosive Applications

Aug 03, 2026 Leave a message

Based on the operating characteristics of seawater-cooled phosphoric acid processes, UKADA developed a customized solution utilizing super duplex stainless steel combined with a spiral plate heat exchanger design to improve equipment reliability under extreme conditions.

 

1. Super Duplex Stainless Steel for Superior Corrosion Resistance

The heat exchanger in this project is manufactured using super duplex stainless steel.

This advanced material combines the advantages of austenitic and ferritic stainless steels and provides excellent performance in chloride-containing, high-salt, and acidic environments.

Key advantages include:

  • Excellent resistance to pitting corrosion;
  • Strong resistance to crevice corrosion;
  • High mechanical strength;
  • Extended equipment service life.

Compared with conventional stainless steel materials, super duplex stainless steel is particularly suitable for:

  • Seawater cooling systems;
  • Phosphoric acid production plants;
  • Wet-process phosphoric acid applications;
  • Highly corrosive industrial heat transfer systems.

 

2. Spiral Plate Heat Exchanger Design for Efficient Heat Transfer and Self-Cleaning Performance

The equipment adopts a dedicated spiral flow channel design, which generates high turbulence during operation.

This structure provides several advantages:

High-Efficiency Heat Transfer

The continuous spiral flow path enhances fluid turbulence and improves heat transfer performance, achieving higher thermal efficiency with a compact equipment design.

Excellent Fouling Resistance

Higher flow velocity generates shear forces on the heat transfer surface, reducing the accumulation of deposits and helping maintain stable heat transfer performance.

Lower Maintenance Requirements

The self-cleaning effect of the spiral structure reduces cleaning frequency, minimizes downtime, and lowers overall operating costs.

 

Project Application Value

This customized heat exchanger is applied in a large-scale continuous phosphate chemical production system.

Item

Description

Industry

Phosphate mining and phosphate chemical production

Application

Seawater cooling of phosphoric acid

Equipment Type

Spiral Plate Heat Exchanger

Main Material

Super Duplex Stainless Steel

Operating Conditions

Highly corrosive and high-salinity environment

Key Advantages

Corrosion resistance, anti-fouling performance, high-efficiency heat transfer, low maintenance

Through advanced material selection and optimized structural design, the equipment improves heat transfer stability, reduces maintenance requirements, and enhances the long-term economic performance of phosphate chemical production systems.

 

UKADA: Professional Customized Industrial Heat Exchanger Manufacturer

Suzhou UKADA Energy Saving Technology Co., Ltd. specializes in the research, development, and manufacturing of industrial heat exchangers, providing customized solutions for challenging industrial applications worldwide.

Main products include:

  • Spiral Plate Heat Exchangers
  • Spiral Wound Heat Exchangers
  • Silicon Carbide Heat Exchangers
  • Double Tube Sheet Heat Exchangers

With extensive engineering experience and strong material application capabilities, UKADA provides reliable heat transfer solutions for industries including:

  • Phosphate chemicals;
  • Petrochemicals;
  • Biodiesel production;
  • Food processing;
  • Mining and mineral processing;
  • Renewable energy.