Large Diameter Spiral Steel Pipe - Strength & Reliability for Critical Infrastructure
Large diameter spiral submerged arc welded pipes (SSAW) are the backbone of modern pipeline systems. They combine excellent mechanical strength, long service life, and flexible sizing, making them ideal for water transmission, oil & gas transport, deep foundation piles, and utility tunnels.
Key Features
● Customizable large diameters – from 219 mm up to 3000 mm (larger sizes on request) to suit high-flow and high-load projects.
● Advanced spiral forming – Double-sided submerged arc welding ensures uniform seam structure and smaller heat-affected zone, resulting in higher overall strength compared to ERW or LSAW pipes.
● Premium raw materials – Hot-rolled steel coils (grades Q235B, Q355B, L245–L485, X42–X80, etc.) guarantee excellent toughness and weldability.
● 100% non-destructive testing – Full-body ultrasonic or X-ray inspection of weld seam, with optional hydrostatic and air tightness tests.
● Custom corrosion protection – Available with 3PE, FBE, coal tar epoxy, and other internal/external coatings for aggressive environments.
Products Main Applications
Long-distance water, oil & gas pipelines
District heating networks & utility corridors
Foundation piles for bridges, ports & high-rise buildings
Industrial cooling water and wastewater systems
Shield tunnel casings and mine support structures
Since its foundation, the company has achieved many international certifications and honours, like API 5L,API5CT,ISO9001-2008,CE Certificate, Pressure pipe production license, license of industrial products production and Chinese petroleum and petrochemical membership card,China quality product certification,Tianjin Famous Brand,exemption product,Tianjin Top 100 private enterprises honours.
active members
years experience
Product quality
Services
Our commitment: Every spiral steel pipe is a long-term investment in safety and efficiency.
Common Problem
How is weld quality inspected?
We perform 100% NDT (non-destructive testing) including automatic ultrasonic testing (UT) and X-ray real-time inspection (RT). Hydrostatic and air tightness tests are available as options.
What is typical delivery time?
Delivery time is normally 15 – 30 days, depending on order volume, coating requirements, and current production schedule.
Can spiral steel pipes be used for piling and structural support?
Absolutely. Large diameter spiral pipes offer high ring stiffness and excellent bending strength, making them ideal for bridge foundations, wharf fender piles, high-rise building piles, and solar farm supports.
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