Oxygen blowing pipes are used for steelmaking oxygen blowing pipes. Generally, small-diameter welded steel pipes are used, and the specifications range from 3/8 inch to 2 inch.

Geological pipe is a steel pipe used for core drilling by geological departments. It is a type of seamless pipe. It is a steel pipe with a hollow section and no seams around it. According to the application, it can be divided into drill pipe, drill collar, core pipe, casing and sedimentation pipe, etc.

Cold-drawn pipe is a kind of steel pipe, that is, it is classified according to different production processes, which is different from hot-rolled (expanded) pipes. It is processed by multi-pass cold drawing in the process of expanding the diameter of the blank or raw tube, usually on a single-chain or double-chain cold drawing machine.

Pipeline transportation engineering Construction of pipelines for transporting oil products, natural gas and solid slurry. Including pipeline line engineering, station depot engineering and pipeline ancillary engineering. In a broad sense, pipeline engineering also includes the supply of equipment and equipment.

The production process of large-diameter thick-walled steel pipe generally includes hot rolling, hot coiling, casting and other production methods. Large-diameter thick-walled steel pipes are mostly produced in double-sided submerged arc welding (SSAW pipe). After bending, jointing, internal welding, external welding, straightening, and flattening, the products meet the standards of the American Petroleum Institute.

At present, there are three types of steel piles commonly used in engineering construction, namely steel pipe piles, section steel piles, and steel sheet piles. Compared with other steel piles, steel pipe piles have their unique advantages in many aspects. Such as bending stiffness, single pile bearing capacity and many other aspects.