Alloy steel pipes are mainly used for high-pressure and high-temperature pipes and equipment in power plants, nuclear power plants, high-pressure boilers, high-temperature superheaters, reheaters, etc. It is made of high-quality carbon steel, alloy structural steel and stainless heat-resistant steel by hot rolling (extrusion, expansion) or cold rolling (drawing).

Metal pipe and seamless pipe have both connections and differences, and cannot be confused. Gold pipe is defined as steel pipe according to the production material (i.e. material), which is the pipe made of alloy as the name implies; Seamless pipe is defined as steel pipe (seam and seamless) according to production process. What is different from seamless pipe is welded pipe, including straight welded pipe and spiral pipe.

Alloy pipe is a kind of seamless steel pipe, which is divided into structural seamless pipe and high-pressure heat-resistant alloy pipe. It is mainly different from the production standard and industry of alloy tubes. The mechanical properties of annealed and tempered alloy tubes are changed. Meet the required processing conditions. Its performance is higher than that of ordinary seamless steel pipe, and its chemical composition contains more Cr, so it has high temperature resistance, low temperature resistance and corrosion resistance. Ordinary carbon seamless pipe does not contain alloy or a small amount of alloy. The reason why alloy tubes are widely used in petroleum, aerospace, chemical, electric power, boiler, military and other industries is that the mechanical properties of alloy tubes are variable and easy to adjust.