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Spiral steel pipes for gathering and transportation pipelines have become the preferred material for long-distance transportation in oil and gas, chemical, and municipal engineering due to their unique structure and performance advantages. The following are its core points:
keyword Spiral steel pipes for gathering and transportation pipelines Category Scene photos Related products Get a quoteSpiral steel pipes for gathering and transportation pipelines have become the preferred material for long-distance transportation in oil and gas, chemical, and municipal engineering due to their unique structure and performance advantages. The following are its core points:
1、 Structural features and performance advantages
Superior mechanical performance
Spiral welds make stress distribution more uniform, increasing the pressure bearing capacity by 30% compared to straight seam pipes, especially suitable for high-pressure transportation environments (such as oil/gas).
The continuous spiral forming process can produce large-diameter steel pipes with a diameter of up to 3620mm, suitable for different conveying needs.
Corrosion resistance and durability
Using Q235B, Q345B and other low-carbon steel or low-alloy steel substrates, and treated with 3PE anti-corrosion layer, epoxy coal tar, etc., the corrosion resistance time is extended by 5-10 years.
Economy and construction convenience
Narrow steel strip production with large pipe diameter increases material utilization by 20% and reduces costs.
Supports multiple connection methods such as welding and flanges, increasing installation efficiency by 40% in complex terrains.
2、 Core production process
Raw material control
Strip steel coils, welding wires, and fluxes must undergo strict physical and chemical inspections to ensure that their chemical composition (carbon, silicon, manganese, etc.) meets GB/T standards.
Quality inspection
Non destructive testing: 100% coverage of online ultrasonic testing, automatic marking and re inspection of defective areas.
Hydrostatic pressure test: Each steel pipe is tested at 1.5 times the design pressure for at least 10 seconds to ensure sealing.
3、 Typical application scenarios
Energy transmission
Oil/natural gas long-distance pipelines are resistant to high pressure and corrosion, ensuring safe transportation.
The cooling water system of thermal power plants is resistant to high temperature impact.
Municipal Engineering
The urban heating pipeline network (such as steel sheathed steel buried insulation pipes) is suitable for temperature differences of -30 ℃ to 120 ℃.
Drainage/sewage treatment system to cope with complex geological conditions.
Industrial sector
Chemical medium transportation pipelines are resistant to acid and alkali corrosion through special anti-corrosion treatment.
4、 Technical specifications and standards
Production standards: follow GB/T 9711 (steel pipes for pipeline transportation systems in the petroleum and natural gas industry), etc.
Anti corrosion requirements: The thickness of the 3PE anti-corrosion layer should be ≥ 2.5mm, and the adhesion of the epoxy coating should pass the grid test.
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