Welded steel pipe is a steel pipe made of steel plate or strip steel after crimping and welding, the production process of welded steel pipes is simple, the production efficiency is high, the varieties and specifications are many, and the equipment investment is low. Smaller diameter welded pipes are straight seam welded, while large diameter welded pipes are mostly spiral welded.

Petroleum pipe (GB9948-88) is a seamless steel pipe for furnace pipe, heat exchanger and pipe in oil refinery. Steel pipe for geological drilling (YB235-70) is the steel pipe used by geological departments for core drilling, which can be divided into drill pipe, drill collar, core pipe, casing and sedimentation pipe according to the purpose. Petroleum pipe is a kind of long steel with hollow section and no joints around it. Petroleum cracking pipe is a kind of economic section steel.

Steel round bar is a solid circular profile is available in broad range of dimensions. It can be easy formed, bent and machined. Steel round bar is ideal for structural framework, braces, supports, shafts and axles. The versatility, availability and relatively low cost of this material results in extensive use in a variety of engineering applications.

​Steel rebart is a ferrous steel deformed bar which is used for reinforcement, strengthening & holding concrete.

Flat steel refers to steel with a width of 12-300mm, a thickness of 3-60mm, a rectangular section and slightly blunt edges. Flat steel can be finished steel, also can be used as blank for welded pipe and thin slab for laminated sheet.

Seamless steel pipe is a kind of long section steel with hollow section and no joints around. It is a kind of economical steel, which is widely used as the pipeline for transporting fluid, such as oil, natural gas, gas, water and some solid materials.