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Lord Fin Tube-Ultra-long stainless steel tube

Taiyuan Iron and Steel Stainless Steel Tube Co., Ltd. broke through the specification limit of seamless tubes and produced a 25-meter ultra-long stainless steel tube for cooling the bottom of a blast furnace in a single hot forming process.

In the past, welded steel pipes were mostly used for butt joints of furnace bottom cooling pipes. Due to the existence of welds, the service life and high temperature resistance are far lower than that of one-time forming extruded pipes. Because the product requires large caliber, length exceeds the specification limit, special use position, etc., it has high quality requirements for high temperature resistance, corrosion resistance, etc., which makes production difficult.

In order to meet the needs of users, the company set up a research team to formulate a special process route and make special molds. By controlling the extrusion rhythm and reducing the cooling curvature, the company successfully extruded a 25-meter super long stainless steel tube. The indicators meet the standard requirements and user needs, and are affirmed by users.

On December 16, 2009, since the 6000-ton extruder extruded the first seamless steel pipe in the technical transformation project of TISCO stainless steel seamless steel pipe, the three process routes of large-diameter steel pipe, medium-diameter steel pipe and small-diameter steel pipe have been fully opened up. ", Kunming World Expo Park, Qinshan Nuclear Power Plant, Daya Bay Nuclear Power Plant, Three Gorges and other projects are made of seamless stainless steel pipes from Taiyuan Steel.

The project is a seamless steel pipe extrusion line with an annual output of 50,000 tons, which is currently the largest extrusion equipment in the country. The outer diameter of the product steel pipe is 6mm-630mm, and the wall thickness is 1mm-40mm. The steel types include austenite, super austenite, heat-resistant steel, alloy steel, duplex steel, nickel-based alloy and super martensite, etc., which can be used for power stations Provide high-quality stainless steel pipes in high-end areas such as boilers, oil and gas exploration, petrochemicals, nuclear power, and military industries. The system is jointly designed by German SMS company and IHWT company. The hydraulic system pressure reaches 320MPa, which is currently the largest hydraulic system in China.