Hollow Sections

Hollow Section Steel Wholesaler

Shape:square,rectangular,circular or custom
Dimensions: square hollow section:
10*10-1200*1200mm
rectangular hollow section:10*15-1200*800mm
circular hollow section:10.3-3620mm or Customizable
W.T.: 0.5-60mm 
Length:0.5-26.5m or custmized
Grade：Gr.A/B/C,S235/275/355/420/460,SS400,etc
Standard：
ASTM A500/501,EN10219/10210,JIS G3466,AS1163,etc.
Surface Treatment：Bare,oil,painted,galvanized,etc.
MOQ:2-5 Tons
Capacity: 5 million tons / year
Packaging:PVC package or follow your needs
Port of origin:Tianjin Port
Payment：TT/LC,etc

Hollow Section Steel Benifit

1. Lightweight
The density of steel hollow slabs is relatively low, usually about one-third of that of concrete products, which makes them lightweight and convenient for construction and transportation.
2. High strength
Hollow steel slabs are composed of steel and have high strength and stiffness. They perform well under natural environmental influences such as heavy loads, wind loads, and earthquakes.
3. Fire resistance and flame retardancy
Fireproof materials are added to the composition of steel hollow panels, which have the characteristics of fire resistance and flame retardancy, making them safer and more reliable.
4. Easy to assemble and install
The steel structure hollow slab adopts factory prefabricated technology, which has the advantages of standardized and precise production and processing. It can be assembled on site and has high installation efficiency.

Pipe Cutting

Yuantai Derun provides steel pipe cutting services for steel pipe users, including value-added services such as square pipe cutting, rectangular pipe cutting, and circular pipe cutting.
Contact Us Now

Pipe Polishing

Yuantai Derun provides steel pipe  polishing services for steel pipe users, including value-added services such as square pipe polishing, rectangular pipe polishing, and circular pipe polishing.

Contact Us Now

Pipe Punching

Yuantai Derun provides steel pipe punching services for steel pipe users, including value-added services such as square pipe punching, rectangular pipe punching, and circular pipe punching.
Contact Us Now

Pipe Threading

Yuantai Derun provides pipe threading services for steel pipe users, including value-added services such as pipe threading outside, pipe threading inside.

Contact Us Now

Pipe Galvanizing

Yuantai Derun provides Pipe Galvanizing services for steel pipe users, including value-added services such as square hollow section galvanizing, rectangular hollow section galvanizing,circular hollow section galvanizing and so on.

Contact Us Now

Pipe Bending

Yuantai Derun provides pipe bending services for steel pipe users, including value-added services such as square pipe bending, round pipe bending,etc.

Contact Us Now

Pipe Painting

Yuantai Derun provides pipe painting services for steel pipe users, including value-added services such as square pipe painting, round pipe painting,etc.

Contact Us Now

Pipe Oiling

Yuantai Derun provides pipe oiling services for steel pipe users, including value-added services such as square pipe oiling, round pipe oiling,etc.

Contact Us Now

Pipe End Groove

Yuantai Derun provides pipe end groove services for steel pipe users, including value-added services such as square pipe end groove, round pipe end groove,etc.

Contact Us Now

Bridge Structures

In our life and industry, Hollow section steel are widely used in large buildings such as bridges and factories because they provide high bearing capacity and structural stability.

Building Structure

Hollow section steel is widely used in building structures because of its excellent yield strength, tensile strength, elongation and corrosion resistance.

Mechanical Manufacturing

In these high-tech fields, the high-temperature stability and mechanical properties of hollow section steel have been fully utilized.

Shipbuilding

Hollow section steel are also widely used in the fields of shipbuilding and mechanical manufacturing, such as manufacturing ship structures, mechanical components, etc.

Manufacturing Process

The manufacturing process of hollow section steel typically involves the following steps:
Raw material preparation: Select suitable steel materials, such as low-carbon steel or alloy steel.
Forming processing: Forming raw steel plates or strips into tube billets through cold rolling, bending and other processes.
Welding: Connect the two edges of the pipe blank by welding to form a closed pipe body. Common welding methods include resistance welding, plasma arc welding, etc.
Heat treatment: To improve the strength and toughness of pipes, annealing, normalizing and other heat treatment processes are required.
Testing and calibration: Conduct size testing on pipes and perform calibration if necessary.
Post processing: Further processing such as cutting and painting as needed.

The hot working process of steel pipes goes through a series of steps such as material preparation, heating treatment, forming processing, surface treatment, testing and quality control, as well as packaging and leaving the factory.
Hot rolling process of steel pipes
Heating: The steel billet is first heated to an appropriate temperature (usually between 1200-1300 ℃). This can be achieved through electric furnaces or other heating methods.
Perforation: The heated steel billet will be fed into the piercing machine and punched to form a tube billet during the rolling process.
Rolling: The pipe blank undergoes a series of rolling processes, including rough rolling and finishing rolling. These rolling opportunities gradually shape the pipe blank into the required size and shape.
Cooling: After rolling, the billet will be cooled to an appropriate temperature to ensure the metal structure and mechanical properties.
Detection and post-processing: After rolling is completed, the steel pipe will undergo size, surface, and internal defect detection. Qualified pipes can undergo further processing such as cutting, welding, and coating.