ND Steel Advantages

ND steel is currently the most ideal steel for "withstanding low-temperature dew point corrosion" both domestically and internationally, widely used in the manufacture of devices and equipment such as economizers (energy savers), air preheaters, heat exchangers, and evaporators that operate in high-humidity flue gases, to resist dew point corrosion in flue gases. ND steel also exhibits resistance to chloride ion corrosion. The main assessment criteria for 09CrCuSb (ND steel) seamless steel tubes/plates (soaked in 70° 50% H2SO4 solution for 24 hours) is that the corrosion rate does not exceed 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 of the same type, and stainless steel in terms of corrosion resistance. The superior corrosion resistance of ND steel and its very high cost-performance ratio make it a perfect substitute for stainless steel and the best material that surpasses stainless steel in terms of dew point corrosion resistance. ND steel holds significant economic importance and aligns with today's "green" concepts of high efficiency, longevity, energy conservation, and environmental protection, as well as with the national development policy orientation. Comparison of 09CrCuSb (ND steel) with other steel grades.

Steel Grade    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

Multiple    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 U.S. and is a low-alloy high-strength atmospheric corrosion-resistant structural steel, known as weather-resistant steel domestically.

Performance Introduction

Well-designed: Horizontal internal combustion triple-return full-wet-back design with 100% wave-shaped furnace tube. It boasts good thermal expansion properties. The water-enclosed fire design ensures ample heating surface area and rational structural arrangement, guaranteeing high-efficiency operation of the boiler.

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

High Efficiency & Energy Saving: Steam and hot water boiler series boast heat efficiency between 92% - 99.8%. The spacious combustion chamber combined with reasonable structural arrangement maximizes heat transfer to the water, greatly enhancing the heat exchange capabilities between fuel-steam and fuel-hot water.

Meets environmental standards: Large combustion space, fully utilizes radiant heat exchange, and incorporates high-quality and reliable imported burners, ensuring complete combustion of fuel and significantly reducing harmful emissions in flue gas. Our company's oil (gas) steam and hot water boilers have passed official department testing and meet national environmental protection 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 even during significant load fluctuations.

Superior Configuration: Equipped with world-renowned burners, an advanced control system (main components are imported), valves, and pumps all use top-quality national 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 run according to the pre-set program. Load regulation, water supply, and other operations are all fully automated, requiring no constant supervision.

Long lifespan: The professional design of our boiler products, advanced production technology, and superior boiler-grade steel guarantee a normal lifespan of over 15 years for the boiler itself.

Easy maintenance: The boiler is equipped with movable smoke box doors at both front and back, with observation and inspection holes at the back, allowing access into the furnace for inspection and cleaning. Manholes are provided on the boiler body, with the structural design taking into account ease of maintenance and repair in the future.

Integrated low nitrogen condensing boiler with large vapor phase space, featuring an internal high-efficiency steam-water separator to reduce steam humidity to below 3%; utilizes advanced digital intelligent control technology for precise remote monitoring of the entire combustion process. Reliable imported electrical components ensure safety and reliability during operation. Optional remote communication interface can be added to control multiple boilers in parallel, with real-time printing of boiler operating parameters. The computer memory system can record boiler failures and monitor boiler operation.

Comprehensive safety accessories for boilers: water level control, pressure control, alarm devices, gas leak prevention, flame-out protection, over-temperature and over-pressure protection, explosion-proof door protection, etc., with multiple safety interlock protections ensuring the equipment is free of safety hazards. The boiler is equipped with internationally advanced imported burners, ensuring complete combustion and harmful components in the flue gas below national standards, making it an environmentally friendly product.

Huzhou Boiler Factory Co., Ltd. is a professional manufacturer of boiler and pressure vessel equipment, and also the leading supplier of LPG storage tanks in China. Having evolved, it now encompasses Huzhou Boiler Factory Co., Ltd., the Installation Branch of Huzhou Boiler Factory Co., Ltd., and Shandong Zhongke Neng Artificial Environment Co., Ltd.