The Main Applications Of Welded Steel Pipes

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Welded steel pipes (referred to as welded pipes) are made from steel plates or strips, rolled into shape, and then welded to form steel pipes. According to the type of weld seam, they can be divided into straight seam welded pipes and spiral welded pipes. According to the cross-sectional shape, they can be classified as round pipes, square and rectangular pipes, etc. Their production efficiency is high, the range of specifications is wide, and the cost is lower than that of seamless steel pipes of the same specifications. They are one of the most widely used steel pipe categories in the national economy, and their core applications cover the following fields:

• Civil and municipal low-pressure fluids: Ordinary straight seam welded pipes (commonly known as water and gas pipes) are the main pipe materials for building water supply and drainage, gas entry, heating and cooling, and fire sprinkler systems; galvanized welded pipes, due to their good rust prevention performance, are widely used in indoor and outdoor transmission networks for tap water, compressed air, and low-pressure steam.
• Long-distance oil and gas transportation: Large-diameter straight seam submerged arc welded pipes (LSAW) and spiral submerged arc welded pipes (SSAW) are the core pipe materials for long-distance oil and gas pipelines, capable of withstanding medium and high-pressure conditions, and are also the main choice for main urban gas transmission networks.
• Municipal water supply and sewage discharge: Large-diameter spiral welded pipes are often used as main water supply pipelines for municipalities, rainwater and sewage separation pipes, and sewage pipelines. After the inner walls are coated with anti-corrosion coatings, the service life can be significantly increased.

• Main steel structure: Square and rectangular welded pipes, as well as structural round welded pipes, are widely used in industrial plants, exhibition venues, and the upright columns, crossbeams, and supporting components of high-rise steel structure buildings, featuring both structural strength and ease of construction.
• Infrastructure and Construction Support: Ordinary straight seam welded pipes are standard pipe materials for scaffolding and formwork supports at construction sites; Large-diameter thick-walled welded pipes can be used as steel casing for pile foundations, driving pipes for bridges, ports, and high-rise buildings.
• Decoration and Municipal Support: Used for structural supports of building curtain walls, outdoor advertising sign frames, road guardrails, street lamps, traffic sign posts, and cable conduit protection pipes.

• As the structural base material for various machinery, it is used for the frames and boom components of construction machinery and agricultural machinery; the drum bodies of belt conveyors and conveying rollers are also commonly processed into shapes using welded pipes.
• In the automotive and motorcycle industries, it is used for low-pressure components such as vehicle frames, bumpers, and exhaust pipes; metal furniture, storage shelves, guardrail nets and other civilian products also use welded pipes as the main raw material.
• It is a common processing blank for pipe fittings such as elbows, three-way valves, and reducers.

•  Power Industry: Used in power plant circulating water systems, ventilation and dust removal pipelines, and low-pressure steam and water pipelines; photovoltaic power station supports and wind turbine tower auxiliary structures also extensively adopt structural welded pipes. Chemicals and Corrosion Protection Scenarios: Plastic-lined, coated, and stainless steel-welded pipes can transport low-pressure corrosive fluids (acid, alkali, salt solutions, chemical materials), meeting the needs of the chemical and water treatment industries.
• Mines and Coal Mines: Used as coal mine gas extraction pipes, underground water supply and drainage pipes, ventilation pipes, and low-pressure mine slurry transportation pipelines.

• Agricultural field: Field irrigation systems and pipeline systems for water supply in gardens.
• Food and pharmaceutical industry: Stainless steel welded pipes for the transportation of clean fluids and food materials, meeting hygiene standards and with significantly lower processing costs for large diameters compared to seamless pipes.
• Shipbuilding and ports: Ballast water pipelines for ships, ventilation ducts, structural supports for port facilities, and water supply and drainage pipelines.

 Typical Application Scenarios of Different Welding Pipe Processes