Large-diameter square pipe is a long steel material with a hollow cross-section and no seams around it. Steel pipes have hollow sections and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, coal gas, water and certain solid materials. Using steel pipes to manufacture ring-shaped parts can improve material utilization, simplify the manufacturing process, and save materials and processing time, such as rolling bearing rings, jack sets, etc., which are now widely manufactured with steel pipes. Let’s take a look at the uses of large-diameter square pipes and their practical applications.

Uses of large-diameter square pipes

Large-diameter square pipes are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. Large-diameter square tubes are also widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycle frames, and steel scaffolding used in construction.

Advantages and Disadvantages of Steel Pipes

Advantages

Compared with solid steel materials such as round steel, steel pipes are lighter in weight when the bending and torsion strength is the same. An economical cross-section steel that is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle frames, and steel scaffolding used in construction. Using steel pipes to manufacture ring-shaped parts can improve material utilization, simplify the manufacturing process, and save materials and processing time, such as rolling bearing rings, jack sets, etc., which are now widely manufactured with steel pipes.

Disadvantages

Steel pipes are still an indispensable material for various conventional weapons. Gun barrels, barrels, etc. are all made of steel pipes. Steel pipes can be divided into round pipes and special-shaped pipes according to different cross-sectional area shapes. Since the circle area is the largest when the circumferences are equal, more fluid can be transported with circular tubes. In addition, the circular cross section is relatively uniformly stressed when subjected to internal or external radial pressure. Therefore, the vast majority of steel pipes are round pipes. However, round tubes also have certain limitations. For example, under the condition of plane bending, round tubes are not as strong as square and rectangular tubes in bending strength. Square and rectangular tubes are commonly used in some agricultural machinery frames, steel and wood furniture, etc. Special-shaped steel pipes with other cross-sectional shapes are also required according to different uses.

Practical applications of large-diameter square tubes

1. Large-diameter square tubes for structures are large-diameter square tubes used in general structures and mechanical structures.

2. Large-diameter square tubes for fluid transportation are general large-diameter square tubes used to transport fluids such as water, oil, and gas.

3. Large-diameter square tubes for low and medium pressure boilers are used to manufacture superheated steam pipes, boiling water pipes for low and medium pressure boilers of various structures, and superheated steam pipes, large smoke pipes, and small smoke pipes for locomotive boilers. High-quality carbon structural steel hot-rolled and cold-drawn (rolled) large-diameter square tubes for arch brick pipes.

4. Large-diameter square tubes for high-pressure boilers are high-quality carbon steel, alloy steel and stainless heat-resistant steel large-diameter square tubes used for the heating surfaces of water tube boilers with high pressures and above.

5. High-pressure large-diameter square pipes for fertilizer equipment are high-quality carbon structural steel and alloy steel pipes suitable for chemical equipment and pipelines with working temperatures of -40~400℃ and working pressures of 10~30Ma. caliber square tube.

6. Large-diameter square tubes for petroleum cracking are suitable for furnace tubes, heat exchangers and pipelines in petroleum refineries.

7. Steel pipes for geological drilling are steel pipes used by geological departments for core drilling. They can be divided into drill pipes, drill collars, core pipes, casings and sedimentation pipes according to their uses.