Product Introduction
Welded steel pipe includes ERW straight seam and LSAW spiral welded pipes. With mature automatic welding technology, it features stable weld quality, high production efficiency and cost advantages. It is the optimal economical pipe for large-diameter, normal-temperature and low-pressure civil and industrial projects.
1. Core Advantages
High Cost Performance: Lower price than seamless pipes, ideal for large-batch procurement.
Wide Size Coverage: Supports large and extra-large diameter pipes with flexible custom lengths.
Reliable Weld Quality: Automatic welding + flaw detection eliminate missing welding and slag inclusion.
Easy Construction: Smooth surface for convenient cutting, installation and anti-corrosion treatment.
Fast Delivery: Mass production and sufficient stock ensure timely shipment.
2. Specifications & International Standards
Material Grades: Domestic: Q195, Q235B, Q345B; International: ASTM A283 Gr.D, A53 Gr.B; EN S235JR, S355JR; JIS SS400, STKM13B.
Process & Standards: ERW straight seam / LSAW spiral weld. Standards: GB/T 3091, GB/T 9711, API 5L, ASTM A135, EN 10217, EN 10219, JIS G3444, ISO 3183.
Size Range: OD 20mm–3200mm, wall 1.2mm–30mm, support galvanizing, heat preservation and fixed-length cutting.
3. Application Scenarios
Widely used for low-pressure, normal-temperature, large-diameter projects:
Municipal: Water supply & drainage, sewage treatment, low-pressure gas pipeline
Construction: Steel structure frames, ventilation and fire-fighting pipelines
Water Conservancy: Irrigation, river diversion and reservoir supporting pipes
General Industry: Mine ventilation, low-pressure fluid transmission, guardrail structures
4. Service & Quality Guarantee
Every welded pipe passes weld flaw detection and hydraulic test. We provide hot-dip galvanizing, anti-rust, heat preservation and custom processing. Stable supply, complete qualifications and professional technical support for global bulk engineering orders.
Product Selection Guide
Low Carbon Steel Pipe: Material-based general pipe with good processability and low cost, suitable for all ordinary low-pressure & normal-temperature projects.
Seamless Steel Pipe: Seamless integral structure with high pressure & temperature resistance, for high-end, precise and harsh working conditions.
Welded Steel Pipe: Cost-effective with large-diameter advantage, best for municipal, construction and large-batch conventional engineering.
