Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of erw hfw welded pipe 76-660mm hdg hot dip galvanized straight tube in China. Welcome to buy discount erw hfw welded pipe 76-660mm hdg hot dip galvanized straight tube made in China here from our factory. Quality products and low price are available.
Product introduction
Product Overview
Our 76–660mm HDG hot dip galvanized straight tubes are premium anti-corrosion welded steel pipes manufactured by mature ERW/HFW high-frequency welding technology and professional hot-dip galvanizing process. This series of galvanized welded pipes features uniform zinc coating, strong coating adhesion, flawless weld structure and excellent overall durability, effectively solving rusting, oxidation and corrosion problems of ordinary carbon steel pipes in humid, coastal and outdoor harsh environments.
Adopting high-quality low-carbon structural steel as raw material, the base pipe delivers stable mechanical toughness, reliable pressure resistance and structural rigidity. After strict pickling, rust removal and high-temperature hot-dip galvanizing treatment, the inner and outer pipe walls form a dense and integrated zinc protective layer. The complete outer diameter range of 76mm to 660mm covers all mainstream specifications for outdoor structural support, municipal water supply, building engineering, greenhouse frame and coastal anti-corrosion pipeline projects. With superior weather resistance, long service life and excellent secondary processability, these HDG galvanized straight tubes are widely recognized as cost-effective anti-corrosion steel pipe solutions for global outdoor and high-humidity engineering projects.
Production Process
High-Quality Base Material Selection: Adopt standard low-carbon steel coils with stable chemical composition and uniform texture, providing high-quality base pipes with excellent welding performance and mechanical stability for subsequent galvanizing treatment.
Precision Strip Slitting: Steel strips are slit with tight dimensional tolerance to ensure uniform wall thickness and symmetrical pipe body, laying a solid foundation for flat galvanized surface and consistent coating thickness.
Multi-Pass Cold Forming: Continuous multi-roll precision cold forming ensures perfect roundness and high straightness of the pipe body, avoiding deformation and surface defects before welding and galvanizing.
Standard ERW/HFW High-Frequency Welding: Optimized high-frequency welding parameters produce defect-free high-strength straight welds. The weld performance is consistent with the base metal to ensure overall structural integrity of the galvanized finished pipe.
Full Weld Bead Trimming & Polishing: Internal and external welding beads are thoroughly trimmed and finely polished to form smooth pipe walls, ensuring uniform zinc layer adhesion and preventing local corrosion defects.
Sizing & Straightening: Professional precision sizing and straightening treatment calibrate pipe dimensional accuracy, meeting standard assembly requirements for engineering and pipeline matching.
Strict Pre-Galvanizing Pretreatment: Complete acid pickling, alkali washing and water cleaning to thoroughly remove surface rust, oil and impurities, ensuring zero contamination before hot-dip galvanizing.
High-Temperature Hot Dip Galvanizing: Adopt standard hot-dip galvanizing process to form a dense, thick and well-bonded zinc layer on both inner and outer pipe surfaces for durable anti-corrosion protection.
Surface Finishing & Quality Sorting: Remove surface zinc slag and burrs, conduct flat finishing to ensure smooth and uniform galvanized appearance and stable anti-corrosion performance.
100% Testing & Fixed-Length Cutting: Conduct hydrostatic pressure test, eddy current NDT inspection and zinc layer thickness detection, support standard and customized fixed-length cutting to meet diverse project demands.
Technical Specifications
Basic Parameters
Product Name: 76-660mm HDG Hot Dip Galvanized ERW/HFW Straight Welded Tube Welding Process: ERW / HFW High-Frequency Electric Resistance Straight Welded Surface Treatment: Hot Dip Galvanized (HDG) Anti-corrosion Coating Core Feature: Uniform zinc layer, strong adhesion, outdoor anti-rust, long service life Executive Standards: ASTM A53, ASTM A500, BS 1387, ISO 1461 Galvanizing Standard Application Scenario: Outdoor anti-corrosion structure, water supply pipeline, building support, coastal engineering
Dimension Range
Outer Diameter: 76mm – 660mm full specification coverage Wall Thickness: 2.0mm – 25.4mm, support customized thick and thin wall thickness Length: Standard 6m/12m length; customizable 1.5–18m fixed length Zinc Layer Thickness: Standard industrial galvanized thickness, customizable heavy-duty zinc coating Tolerance: International standard structural & pipeline grade tolerance, suitable for precise engineering assembly
Mechanical & Anti-Corrosion Performance
Minimum Yield Strength: 290MPa Minimum Tensile Strength: 400MPa Elongation: ≥21% Core Performance: Excellent outdoor weather resistance, strong salt spray and moisture corrosion resistance, stable structural load-bearing capacity, not easy to rust, peel or deform during long-term outdoor exposure service
Product Advantages
Premium HDG Anti-Corrosion Performance: Standard hot-dip galvanizing forms a dense protective zinc layer, effectively isolating air, moisture and salt spray, greatly improving outdoor rust and corrosion resistance compared with black pipes.
Uniform & Firm Zinc Coating: Professional pretreatment and high-temperature galvanizing process ensure consistent zinc layer thickness and strong adhesion, no peeling or falling off during bending, cutting and welding processing.
Long Outdoor Service Life: Integrated anti-corrosion structure adapts to long-term outdoor exposure, buried laying and coastal humid environments, reducing frequent replacement and maintenance costs.
Stable Weld & Structural Safety: High-standard ERW/HFW welding ensures weld consistency and pressure resistance, avoiding leakage and structural failure of galvanized pipelines and structural parts.
Excellent Secondary Processability: The galvanized tube supports cutting, drilling, bending and on-site welding, flexible for customized structural processing and pipeline layout design.
Neat & Beautiful Surface: Smooth and uniform galvanized finish with no zinc slag or missing coating, meeting the appearance requirements of building exterior structures and municipal engineering projects.
Wide Applicability & High Cost Performance: Complete specifications and stable quality, suitable for multiple industries, achieving long-term low-maintenance operation and high comprehensive economic benefits.
Application Fields
Outdoor building steel structure supports and frame engineering
Municipal outdoor water supply, drainage and fire-fighting pipeline systems
Coastal area anti-corrosion structural pipes and fluid delivery pipelines
Agricultural greenhouse frame, garden landscape and public facility supports
Factory outdoor piping, equipment support and anti-corrosion structural components
Construction site guardrails, support frames and outdoor auxiliary steel structures
All kinds of outdoor engineering projects requiring long-term anti-rust and anti-corrosion protection
Packaging & Delivery
All HDG hot dip galvanized welded pipes adopt professional anti-scratch export packaging. Pipes are bundled with high-strength steel strips and fitted with thickened plastic end caps to protect galvanized pipe ends and surface coating from collision and scratch. Waterproof and moisture-proof wrapping is applied to prevent white rust and oxidation during long-distance sea transportation and stock storage. Support FCL container loading and bulk shipment, with customizable engineering exclusive shipping marks and batch packaging for large-scale project orders.
Quality Assurance & Service
We implement full-process ISO quality management system for HDG galvanized welded pipes. Complete Mill Test Certificates, galvanized layer thickness test reports, hydrostatic pressure test records and NDT inspection certificates are provided for each batch. Third-party inspections such as SGS and BV are acceptable. We support long-term bulk supply, customized fixed-length processing and special zinc layer customization, providing one-stop professional services including parameter confirmation, production tracking, anti-corrosion quality inspection and full set of export clearance documents.
About us
Hebei Huayang Steel Pipe Co., Ltd. was founded in 2005, with a registered capital of 500 million yuan. The company covers an area of more than 1,000 mu, with annual sales of 10 billion yuan, more than 600 employees and an annual productivity of 2.75 million tons. The company has 17 new automatic steel pipe production lines and 14 high-frequency production lines, with a diameter of 73-660 mm; Three double-sided submerged arc welded steel pipe production lines with diameters of 406.4-1422.4mm;; 24 hot tube expanding production lines, with a diameter of 230-820mm; Two anticorrosion steel pipe production lines with a diameter of 73-1626 mm; 2 automatic painting production lines. With 3 branches and 5 offices, the products are sold to various cities and exported to more than 80 countries such as Southeast Asia, Middle East, Europe and America.
Packaging, transportation and delivery
Packaging, transportation and delivery
At Hebei Huayang Steel Pipe Co., Ltd., we apply standardized and reliable packaging solutions for all our steel pipe products. Our pipes can be securely packed by hexagonal bundling or circular bundling according to product diameter, wall thickness and customer requirements. Each pipe end is protected with high‑strength plastic pipe caps to avoid collision damage, dust and moisture during transportation and storage. The whole bundle is firmly wrapped with durable woven bags to enhance stability and prevent scratches or deformation.
We support a complete range of transportation methods to satisfy global customers, including road transportation, railway transportation, sea freight and container shipping. Based on our strategic location in Cangzhou, Hebei Province, we enjoy convenient access to major ports such as Tianjin Port, which greatly improves logistics efficiency and reduces transportation costs.
For standard specifications and normal order quantities, the general delivery time is about 30 days after order confirmation and deposit receipt. For large‑scale orders, special sizes or customized processing requirements, our production and sales team will formulate a detailed production plan and provide an accurate delivery schedule accordingly to ensure on‑time supply and stable performance for projects and clients worldwide.
Strict quality control
1. During and after the production, experienced quality inspectors randomly check the products to ensure that each steel pipe is qualified for production and application.
2. A nationally recognized laboratory with CNAS certification and certification by French Classification Society.
3. Have CNOOC access certificate, KOC oil company access network, ADNOC Abu Dhabi oil company access network, Petrobras access network, etc.
4. Accept the inspection by the third party designated/paid by the buyer, such as SGS and BV.
Certifications
API 2B
API 5L
GOST
ISO 9001
EN 10219
EN 10210
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