Q355b Spiral Steel Pipes For Water Delivery

Spiral Steel Pipe for Conveying Shipments Product Details

Its core advantages lie in its superior diameter capacity and pressure resistance. Thanks to its unique spiral welding structure and submerged arc welding process, the pipe body not only exhibits uniform stress distribution but also flexibly meets the engineering requirements of large-diameter water conveyance projects. The inner wall can be lined with cement mortar or coated with epoxy coal tar according to anti-corrosion requirements, effectively resisting water erosion and scaling; the outer wall adopts a heavy-duty anti-corrosion design to cope with complex soil environments. With its excellent cost-effectiveness and shorter delivery cycle, this product has become an ideal alternative to traditional ductile iron pipes and prestressed concrete pipes, providing a reliable guarantee for building safe and durable water conveyance systems.

Technical specifications 

Quality Inspection of Q355B Spiral Steel Pipes for Water Transmission

The production line first uses a real-time ultrasonic monitoring system to scan 100% of the spiral weld seam, accurately identifying microscopic defects such as internal porosity and slag inclusions. Each formed welded pipe must undergo a hydrostatic pressure test, continuously holding pressure at more than 1.5 times the working pressure to verify its pressure-bearing strength and sealing performance. Considering the characteristics of Q355B material, the laboratory regularly samples for mechanical property retesting, confirming key indicators such as yield strength ≥355MPa and impact energy ≥34J. Finally, an electric spark leak detector is used to scan the anti-corrosion coating throughout the entire line, supplemented by precise three-dimensional dimension verification of the pipe ends. This closed-loop quality control system, from material performance and welding quality to anti-corrosion protection, provides decades of lifespan assurance for water transmission projects.

About us

GNEE STEEL's main product, spiral welded steel pipes for water transmission, is manufactured using internationally standardized steel. Strict process control ensures that the products meet the pressure-bearing capacity and corrosion resistance requirements of different regions. The company has a stable export network of large-diameter steel pipes to Southeast Asia, the Middle East, and Africa, becoming a trusted supply partner for international customers due to its reliable product quality.

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