ND Steel Advantages

ND steel is the most ideal material for "resistance to low-temperature dew point corrosion" both domestically and internationally, widely used in the manufacturing of devices such as economizers (energy savers), air preheaters, heat exchangers, and evaporators that operate in high-humidity flue gas environments, to combat dew point corrosion in flue gas. ND steel also exhibits resistance to chloride ion corrosion. The main evaluation criteria for 09CrCuSb (ND steel) seamless steel tubes/plates (immersed in 70°50% H2SO4 solution for 24 hours) is a corrosion rate not exceeding 14mg/cm²·h, which is 1.84 times that of Japanese CR1R steel, 2.97 times that of 1Cr18Ni9 steel, 8.63 times that of Corten steel, and 14.11 times that of Q235B steel, when compared to carbon steel, imported Japanese steel, and stainless steel in terms of corrosion resistance. The superior dew point corrosion resistance and excellent cost-performance ratio of ND steel make it a perfect substitute for stainless steel and the best material to surpass stainless steel in terms of dew point corrosion resistance. ND steel holds significant economic importance and aligns with the current "green" concepts of efficiency, longevity, energy conservation, and environmental protection, as well as the national development policy orientation. Comparison of 09CrCuSb (ND steel) with other steel grades.

Steel Grades   09CrCuSb (ND Steel)   CRIR (Japan)   1Cr18Ni9   Corten   S-TEN (Japan)   A3 (Q235B)

Corrosion Rate  7.30  13.40  21.70  63.00  27.4  103.50

Multiples 1 1.84 2.97 8.63 3.75 14.11

Note: Corten steel, also known as weathering steel, is divided into two main categories: Corten A and Corten B. It represents the Cu-P series steel in the United States and is a low-alloy, high-strength atmospheric corrosion-resistant structural steel, known as weather-resistant steel in China.

Performance Introduction

Well-designed: Horizontal internal combustion three-pass full-wet back design, 100% corrugated furnace tube. Excellent thermal expansion properties. Overall water包围fire design, ample heating surface area and reasonable structural arrangement, ensuring high-efficiency operation of the boiler.

Manufacturing Standards: The company has established and reliably operates a comprehensive quality assurance system. The manufacturing process of the products is fully controlled and supervised by a special inspection office on-site.

High Efficiency Energy-Saving: The steam and hot water boiler series feature a thermal efficiency of 92%-99.8%. With a large combustion chamber and a well-designed layout, more heat can be transferred to the water, greatly enhancing the heat exchange capabilities between fuel and steam, and fuel and hot water.

Meets environmental standards: Large combustion space, maximizes radiant heat exchange, and features a high-quality, reliable imported burner for complete fuel combustion, significantly reducing harmful emissions in flue gas. Our company's fuel (gas) steam and hot water boilers have passed government department testing and comply with national environmental standards, making them ideal eco-friendly products.

High heating quality: Steam boilers feature ample steam storage capacity, ensuring the supply of high-quality dry steam during significant load fluctuations.

Superior Configuration: Equipped with world-renowned burners, advanced control systems (main components are imported), valves, and pumps all using national high-quality products. The excellent boiler accessory configuration provides a strong guarantee for the safe operation of the boiler.

Fully Automatic Operation: Simply press the start button, and the boiler will operate according to the set program. Load regulation, water supply, and other processes are all fully automatic, requiring no constant supervision.

Long service life: The professional design of our boiler products, advanced production technology, and high-quality boiler steel ensure that the normal lifespan of the boiler body is over 15 years.

Easy Maintenance: The boiler is equipped with movable ash box doors at both the front and back. The back features observation and inspection holes, allowing access to the furnace chamber for inspection and cleaning. A manhole is also provided on the boiler body, with the structural design taking into account easy future maintenance.