Uses of Seamless Pipes in Steel Structures

Seamless  steel pipes are made of cylindrical blanks through multiple processes such as heating, perforation, rolling or drawing. They have smooth inner surfaces and strong corrosion resistance. They are widely used in many fields such as petroleum, chemical industry, machinery, automobiles, nuclear power, aviation, etc. In the construction industry, seamless pipes are also widely used, especially in steel structures.

Steel structure is a structural form assembled from steel components, with the characteristics of light structure, high strength and convenient construction. Seamless pipes are one of the important components of steel structures. The application of seamless pipes in steel structures can greatly improve the strength and stability of steel structures and ensure the safety of buildings.

Uses of seamless pipes in steel structures

1. Bridge construction: Seamless steel pipes are used in key parts such as piers, arch rings, and inclined cables of bridges. Due to their high strength and high stiffness, they help to ensure the safety and durability of bridges.

2. High-rise buildings: In high-rise buildings, seamless steel pipes are often used in structural frames and support systems, which help to achieve the stability and safety of buildings, while improving seismic and wind resistance.

3. Petrochemical industry: Seamless steel pipes are used for pipelines and reactor supports that withstand high temperature, high pressure and corrosive environments. Their high strength, corrosion resistance and good sealing ensure the safety and normal operation of the equipment.

4. Mechanical structure: Seamless steel pipes for structures (GB/T8162-2008) are mainly used for general structures and mechanical structures. Their representative materials include carbon steel No. 20, No. 45 steel, Q235, alloy steel Q345, etc.

5. Steel structure pipelines: Seamless steel pipes are used to manufacture pipelines, containers, equipment, pipe fittings, etc., and are suitable for corrosion-resistant pipelines and structural parts in the chemical, petroleum, textile, medical, food and other industries.

6. Auto parts: In the manufacture of automobiles and public transportation vehicles, seamless steel pipes are used for the processing of parts to ensure their durability and safety.

7. Agricultural equipment: Seamless precision steel pipes are also widely used in structural components of agricultural equipment. Due to their corrosion resistance and durability, they are suitable for use in various environmental conditions.

8. Traffic facilities: Including pedestrian railings, guardrails, square structures, etc., seamless steel pipes are selected for their stability and safety.

9. Logistics and warehousing: such as supermarket shelves, furniture, etc., seamless steel pipes provide the necessary support and structural strength.

Advantages of seamless pipes in the field of steel structures

 Compared with welded pipes, seamless pipes have the following advantages:

1. High strength

Since there is no weld on the inner wall of the seamless steel pipe, its strength is high, and its toughness and impact toughness are also better. Therefore, its pressure bearing capacity is higher than that of welded pipes of the same specifications and materials. The use of seamless pipes in steel structures can effectively improve the stability and seismic performance of the structure. 

2. Strong corrosion resistance

The surface of the seamless steel pipe is smooth, without iron oxide scale and defects, so its corrosion resistance is better than that of the welded pipe. It can resist the erosion of various chemical substances such as acid, alkali, salt, oxide, etc., and is widely used in marine engineering, petrochemical and other environments.

3. High temperature resistance

The seamless pipe material has the characteristics of anti-oxidation and anti-thermal expansion. It can be used in high temperature environments for a long time and is widely used in nuclear power and aviation fields.

4. Accurate size

There is a significant difference in the diameter accuracy of welded pipes and seamless pipes. The accuracy of welded pipes is lower than that of seamless pipes. The diameter error of welded pipes under different standards is between 2% and 3%, while the diameter error of seamless pipes is only less than 1%. Therefore, seamless pipes are preferred in situations where higher precision is required. Seamless steel pipes can be customized according to customer requirements, with smooth surfaces and precise dimensions, which can meet various high-demand design and manufacturing needs.

5. Low processing cost

Seamless steel pipes do not need to remove welds before processing, so the processing cost is low, and some special-shaped pipes can only be made with seamless steel pipes.

6. Convenient construction

Seamless pipes have advanced design and processing, convenient and fast construction, no cutting is required during installation, and they can be directly connected, reducing construction difficulty and time cost.