Thick-Walled Round Welded Pipe

Thick-walled round welded pipe is a circular cross-section steel pipe made by rolling steel plates or strips into shape and then welding. Its wall thickness is usually relatively thick (generally greater than 10mm, with different definitions in different scenarios). It uses steel strips and plates as blanks, and is welded by processes such as arc welding, resistance welding (high-frequency, low-frequency), gas welding, furnace welding, covering forms such as straight seam welding and spiral welding. The materials include plain carbon steel (such as Q195, Q235), low-alloy steel (such as Q355, 16Mn), stainless steel (such as 304, 2205), etc., adapting to diverse industrial needs.

Main Features

• Strong Mechanical Properties: The thick-walled design endows it with high compressive and deformation-resistant capabilities, able to bear large loads and pressures. It is stable and reliable in high-pressure transportation and heavy structural support scenarios, such as high-pressure fluid transportation pipelines, ensuring the safety of medium transmission.
• Wide Material Adaptability: Plain carbon steel meets general strength requirements; low-alloy steel can cope with complex working conditions such as high temperature, high pressure, and corrosion; stainless steel has both corrosion resistance and aesthetics, suitable for special environments such as food, medical, and marine industries.
• Flexible Production: There are various production processes. High-frequency welding has high efficiency and is suitable for mass production; spiral welding can produce large-diameter pipes with narrow steel strips; it can also be customized with different calibers, wall thicknesses, and lengths to meet diverse project requirements.
• Cost Advantage: Compared with seamless pipes, the production equipment is lightweight, with less investment and fast forming. The cost is more than 20% lower in mass production, with both economy and practicality.

Application Fields

Industrial transportation: Used in fluid (oil, gas, chemical media) transportation pipelines in petroleum, natural gas, chemical and other industries. With the advantages of thick walls and materials, it resists high pressure and corrosion, ensuring the production process.
Building structure: Used as structural pipes for building pile foundations, bridge supports, steel structure frames, etc., such as pile foundations and trusses of large buildings and bridges. It uses mechanical properties to bear building loads and ensure structural stability.
Machinery manufacturing: It is a key component of heavy machinery, pressure vessels, mining equipment, etc., such as hydraulic cylinders and equipment casings. It relies on thick walls and strength to ensure safe and stable operation of equipment.
Energy and electricity: In power station facilities such as thermal and hydroelectric power generation, it is used for steam-water pipelines and circulating water pipelines, adapting to working conditions such as high temperature, high pressure, and water flow impact, maintaining the operation of energy systems.
Municipal engineering: Used in urban water supply, sewage treatment, gas transportation and other pipe networks, meeting the requirements of municipal construction for pipeline strength, durability and tightness, ensuring urban basic people's livelihood.
Special fields: Stainless steel thick-walled round welded pipes are widely used in food processing, medical equipment, marine engineering (such as shipbuilding, seawater desalination) due to their corrosion resistance and hygiene characteristics, such as transportation pipelines in food factories and structural and fluid transportation components of ships.