On October 25, the world leading manufacturers providing an extensive range of products including: • Seamless Piping, • CRA OCTG, • CRA line pipe, • Clad / lined pipe, • Butt Welding Pipe fittings, • Flanges with material grades of stainless steel , (super) duplex, corrosion resistant alloy, high / low temperature resistant alloy and titanium: ZJJL Special Pipeline Technology Group issued an announcement saying that in response to the growing market demand for low-carbon emission coal-fired power generation, ZJJL Group and Sandvik Materials Technology signed a "Cooperation Agreement" to establish a strategic partnership for the supply of high-alloy austenitic stainless steel Sanicro25 for ultra-supercritical (AUSC) boiler superheaters and reheaters.
In recent years, in order to further reduce energy consumption, reduce pollutant emissions, and improve the environment, global conventional thermal power technology has rapidly developed into a higher-parameter ultra-supercritical technology. China's high-parameter power plant critical boiler unit design and manufacturing technology has experienced the introduction, digestion and further development, including the material high-temperature heating surface pipe series, including TP304H, TP347H and S30432, TP310HCbN and so on.
Global conventional thermal power technology is rapidly developing towards ultra-supercritical technology with higher parameters. The development of ultra-supercritical thermal power units. The effect of increasing steam parameters on improving the efficiency of thermal power plants is very obvious. With the increase of steam temperature and pressure, the efficiency of power plant boilers has been greatly improved, and the coal consumption for power supply has been greatly reduced. Austenitic heat-resistant steel is mainly used in the outlet of superheater and reheater tubes. In this pipe segment, in addition to high temperature creep, steam oxidation and flue gas corrosion have become important failure factors. The outlet section of the superheater and reheater has the highest temperature and pressure, and the steam oxidation and flue gas corrosion are the most serious. Super304 has insufficient oxidation resistance and insufficient HR3C strength. To build a high-efficiency ultra-supercritical thermal power unit boiler and ensure the safe operation of the superheater and reheater in the high temperature section, new materials need to be found to meet the requirements.
Sandvik Sanicro 25 is a kind of austenitic stainless steel material (22Cr25NiWCoCu, S31035, EN1.4990). It is an alloy product specially developed by Sandvik for superheater and reheater tubes for ultra-supercritical coal-fired power generation. Sanicro 25 has good creep resistance, excellent water vapor oxidation resistance and high temperature corrosion resistance. It also has good weldability and cold bending forming processing.
The Chinese government is focusing on energy structure adjustments such as the tensile strength of Sanicro 25 chemical components. Clean and efficient coal-fired power generation has become the general trend. The research and application of high-temperature heat-resistant steel has become the key to improving the parameters of coal-fired power plants, reducing coal consumption and reducing emissions.
Former competitors, today ’s partner ZJJL Group and Sandvik Materials Technology partnership are limited to Sanicro 25 ’s use in coal-fired power plants, and are not applicable to other products. At the beginning of the cooperation, Sanicro 25 will continue to be produced at Sandviken's manufacturing plant in Sweden. The steering committee will be composed of company representatives to manage technical marketing and operational activities. Subsequently, Sandvik will supply raw materials to ZJJL Group, and ZJJL Group will be responsible for the later Large-scale production and processing of pipes. Founded in 1987, ZJJL Group is a listed company specializing in the production of industrial stainless steel and special alloy pipes, bimetallic composite pipes and fittings. The company has built a world advanced stainless steel, corrosion-resistant alloy, titanium alloy, high-temperature alloy seamless pipe (hot extrusion / perforation + cold rolling / cold drawing) production line and FFX forming, JCO forming and other welded pipe production lines. Energy equipment such as oil and gas, power, nuclear power, LNG, and petrochemical, chemical, shipbuilding and other industrial equipment provide high-performance, corrosion-resistant, pressure-resistant, and temperature-resistant stainless steel pipes; stainless steel, nickel-based alloys, carbon steel, alloy steel and other material methods Blue, pipe fittings, etc., the pipe production and sales rank first in China for many years.
Sandvik Material Technology Sandvik Material Technology is one of the business units of the Sandvik Group. It is the world's leading material supplier, providing advanced stainless steel and special alloy materials with high added value for the most demanding industries. Its outstanding expertise is based on an integrated production platform and world-leading metallurgy and R & D. The business operation is divided into three product areas, such as pipe, strip and wire. In 2014, sales amounted to 15 billion SEK and the number of employees was approximately 7,000. Sandvik Group Sandvik is a global high-tech industrial group that provides products and services designed to improve customer productivity, profitability and safety. At present, Sandvik has developed into a global industry leader in the fields of metal cutting tools, mining and construction equipment and tools, seamless stainless steel, special alloys, high-temperature materials and transmission systems. In 2014, the Group's business spanned more than 130 countries, with approximately 47,000 employees and annual sales of SEK 89 billion.