hot expand seamless steel pipe

From a single solid steel round billet heated to extreme temperatures, seamless steel pipes are shaped through a pushing or pulling process called mandrel. The finishing touches done on these pipes range from 1/8 inches to 26 inches in diameter and wall thickness. Consisting of iron and carbon, Carbon Steel Seamless Pipes / Tubes are known for their distinct properties which is affected by the percentage of carbon in the alloy. The more carbon is in the steel alloy, the stronger, harder, and more durable it becomes, usually having between 0.30% and 1.70%. To modify their size and shape further, the hot expanding process is often used which involves heating the pipe to an appropriate temperature before expanding it evenly with pressure.

Two types of hot expanding processes exist for seamless steel pipes: internal pressure expansion which involves heating the pipe in a perforated container so that it broadens under its own pressure, and external pressure expansion where the pipe is heated to the suitable temperature and then forced to expand using pressure applied to the mould it’s in.

The hot expanding process associated with seamless steel pipe construction is advantageous for a variety of reasons. Not only does it fast-track the manufacturing process, but it also has been observed to guard against excessive energy usage and material wastage, as well as cut down on eventual expenditure. This practice of hot expanding can likewise be implemented to facilitate production of seamless steel pipe of many diversified materials and specifications.

The expansion of seamless steel pipe is usually completed with a hot expanding machine. This machine consists of a furnace, the expander for the seamless steel pipe, a container or mold featuring small holes, and a cooling system.

The creation of seamless steel pipe is achieved through a process of expansion – one that stands out for its intense heat. Here are the essential steps involved:

Seamless steel pipes manufactured adhere to all applicable national standards.

Seamless steel pipes require a heat treatment that typically encompasses either normalizing or normalizing plus tempering.

Cavities in a metal mold or other specially designed holder are filled with seamless steel pipes, which are then submitted to a furnace for the required period of fractional intensity heating.

Heating the seamless steel pipe to the right temperature is necessary before using the seamless steel pipe expander to bring it into its desired form.

Subsequently, to complete the fabrication process, a cooling system is utilized to cool down the expanded seamless steel pipe.

After the seamless steel pipe is cooled, the process of removal from either the perforated container or mould begins followed by surface treatment, inspection, and then lastly packaging.

Post time: 2023-06-26

Related Product

  • Hot Dip Galvanized Round Steel Pipe

    Hot Dip Galvanized Round Steel Pipe

    Yuantai Derun Steel Pipe Manufacturing Group produces hot-dip galvanized round steel pipes, which are sold directly by manufacturers, support customization, and have guaranteed qua […]

  • LSAW Steel Pipe(Longitudinally Submerged Arc Welding Tube)

    LSAW Steel Pipe(Longitudinally Submerged Arc Welding Tube)

    Lsaw Steel Pipe(Longitudinally Submerged Arc Welding Tube) JCOE is a pipe making technology for the production of large diameter thick wall steel pipes. It mainly adopts the produc […]

  • ERW Round Steel Pipe

    ERW Round Steel Pipe

    Standard:Hollow section:ASTM A500/501,EN10219/10210, JIS G3466,GB/T6728/T3094/3091,CSA G40.20/G40.21 Section Shape: round OD(outer meter): 10.3mm-609mm Application: Structural type […]

  • Round Welded Pipe

    Round Welded Pipe

    Since the 1930s, with the rapid development of continuous rolling production of high quality strip steel and the progress of welding and inspection technology, the quality of weld […]

  • Pre Galvanized Round Steel Pipe

    Pre Galvanized Round Steel Pipe

    The round pipe with galvanized strip is made of galvanized strip steel, which is generally 0.6MM-2MM. It is processed and formed at one time, with the specification of 15 * 15-100 […]

  • Scaffold Steel Pipe

    Scaffold Steel Pipe

    Introduction to scaffold steel pipe Scaffold steel pipes are generally called scaffold pipes, which is a special term used by people in building or construction. Scaffold steel pip […]

  • Spiral Welded Steel Pipe

    Spiral Welded Steel Pipe

    Spiral welded steel pipe introduction Spiral welded steel pipe refers to the steel pipe with joints on the surface, which is welded after the steel strip or steel plate is bent and […]

  • GI Circular Steel Pipe

    GI Circular Steel Pipe

    Galvanized round steel pipe Generally, there are two major categories: pre galvanized round steel pipes and hot-dip galvanized round steel pipes. Hot dip galvanized pipe is to make […]

  • UL797 American Standard Certified EMT Threading Pipe EMT Pipe

    UL797 American Standard Certified EMT Threading Pipe EMT Pipe

    OD(outer diameter): 22mm-112mm Thickness: 0.75- 3 mm Place of Origin: Tianjin, China Application: Structural type or fluid transportation Certification:CE,LEED,BV,PHD&EPD,DNV,B […]