Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of cold drawn finished hfw welded pipe 76-660mm precision machining tube in China. Welcome to buy discount cold drawn finished hfw welded pipe 76-660mm precision machining tube made in China here from our factory. Quality products and low price are available.
Product introduction
Product Overview
Our 76–660mm cold drawn finished HFW welded pipes are high-precision machining-grade steel tubes upgraded with professional cold drawing finishing technology. Based on mature HFW high-frequency welding process, this series of precision tubes undergoes secondary cold drawing, precision sizing, surface finishing and stress relief treatment, featuring ultra-tight dimensional tolerance, smooth flawless surface, uniform wall thickness and stable mechanical consistency. Different from ordinary welded pipes, cold drawn finished treatment eliminates pipe body residual stress, improves roundness, straightness and surface finish, fully meeting high-precision matching and secondary machining requirements.
Manufactured with high-quality low-carbon structural steel, the precision HFW tubes deliver excellent toughness, uniform texture and superior processability. The complete outer diameter range of 76mm to 660mm covers mainstream specifications for mechanical precision matching, equipment structural parts, hydraulic pipeline systems and industrial precision engineering. Available with black finished, anti-rust oil coating and galvanized surface treatment, these cold drawn precision tubes support cutting, drilling, turning, bending and other deep processing. With high dimensional accuracy and zero-defect surface performance, they are ideal precision steel pipe solutions for mechanical manufacturing, automation equipment, industrial precision structures and high-end pipeline projects worldwide.
Production Process
High-Precision Grade Raw Material Selection: Adopt low-carbon steel coils with stable chemical composition and low internal stress, providing qualified base materials for subsequent cold drawing finishing and precision machining.
Precision Strip Slitting: Steel strips are slit with ultra-precise tolerance control to ensure consistent initial wall thickness, laying a foundation for uniform deformation during cold drawing processing.
Multi-Pass Cold Forming & HFW Welding: Standard high-frequency welding and forming process ensures uniform pipe body structure and high-strength weld seams, avoiding structural defects before cold finishing.
Weld Bead Fine Polishing: Internal and external weld beads are completely trimmed and finely polished to ensure flat pipe surface, preventing drawing scratches and stress concentration during cold processing.
Professional Cold Drawn Finishing: Adopt multi-pass cold drawing process to refine pipe structure, optimize roundness and straightness, and achieve micron-level dimensional tolerance control.
Stress Relief Heat Treatment: Special tempering treatment eliminates internal residual stress generated during cold drawing, ensuring no deformation during subsequent precision machining and long-term service.
Precision Sizing & Straightening: Secondary high-precision sizing and straightening further calibrate pipe diameter, wall thickness and linearity to reach precision machining grade standards.
100% NDT & Appearance Inspection: Each pipe undergoes eddy current flaw detection and full appearance inspection to ensure no cracks, scratches or dimensional deviations.
Accurate Fixed-Length Cutting: Support standard 6m/12m lengths and customized 1.5–18m fixed lengths, adapting to different precision machining and equipment assembly requirements.
Fine Surface Anti-Rust Treatment: Adopt uniform anti-rust oil or customized surface protection to keep the precision surface smooth and scratch-free during transportation and storage.
Technical Specifications
Basic Parameters
Product Name: Cold Drawn Finished HFW Precision Machining Steel Tube Processing Technology: HFW High-Frequency Welding + Cold Drawn Finishing Core Feature: High precision, smooth surface, low residual stress, excellent machinability Executive Standards: ASTM A53, ASTM A500, BS 1387, Precision mechanical tube standards Surface Options: Black finished, anti-rust oil coated, hot-dip galvanized
Dimension Range
Outer Diameter: 76mm – 660mm (full specifications for industrial precision machining tubes) Wall Thickness: 2.0mm – 25.4mm, customized precision thick and thin walls available Length: Standard 6m/12m random length; customizable fixed length 1.5m–18m Tolerance: Precision machining grade ultra-tight tolerance, far higher than ordinary welded pipe standards
Mechanical Performance
Minimum Yield Strength: 290MPa Minimum Tensile Strength: 400MPa Elongation: ≥21% Core Performance: Uniform internal structure, low residual stress, excellent dimensional stability, no deformation after machining, superior bending and flattening performance
Product Advantages
Micron-Level Precision Dimensional Stability: Professional cold drawn finishing process greatly improves pipe roundness, straightness and wall thickness uniformity, meeting strict tolerance requirements of precision equipment assembly.
Superior Smooth Surface Finish: Fine polishing and cold drawing treatment eliminate surface burrs, welding marks and scratches, ensuring clean and flat inner and outer walls for high-precision matching.
Zero Deformation Machining Performance: Stress relief treatment removes internal residual stress, effectively avoiding bending, twisting and shrinking during cutting, drilling and turning processing.
Consistent Structural Uniformity: Cold working refines metal grain structure, improving pipe body density and mechanical stability, ensuring consistent performance of each batch of precision tubes.
Excellent Secondary Processability: Balanced hardness and toughness support various precision machining processes, suitable for customized mechanical parts and high-precision structural manufacturing.
High Assembly Matching Accuracy: Ultra-tight tolerance ensures precise docking with flanges, bearings and mechanical accessories, improving equipment assembly efficiency and finished product accuracy.
Durable & Stable Service Life: Compact structure and stable mechanical properties resist fatigue and deformation during long-term mechanical operation, reducing equipment failure rate.
Application Fields
Mechanical equipment precision structural parts and frame supporting components
Automation equipment base frames and high-precision matching pipelines
Hydraulic and pneumatic system high-precision conveying pipelines
Engineering machinery supporting precision tubes and mechanical processing parts
Industrial robot equipment brackets and precision structural assemblies
High-end equipment manufacturing, instrument and apparatus matching steel tubes
Custom precision mechanical processing and high-precision engineering projects
Packaging & Delivery
All cold drawn finished precision HFW pipes adopt specialized anti-scratch precision export packaging. Each pipe is fitted with thickened soft plastic end caps to protect precision pipe ends and inner walls. Anti-collision and dust-proof wrapping is applied to avoid surface scratch, extrusion deformation and dust contamination. Standard anti-rust oil treatment ensures long-term surface finish during sea transportation. Support FCL container shipment and bulk delivery, with customizable precision product exclusive packaging and shipping marks for mechanical manufacturing batch orders.
Quality Assurance & Service
We implement strict full-process quality control for cold drawn precision tubes. Complete Mill Test Certificates, precision dimension inspection reports, stress treatment records and NDT inspection certificates are provided for each batch. Third-party inspections such as SGS and BV are acceptable. We support customized precision processing, fixed-length cutting and mass batch supply, providing one-stop professional services including precision parameter confirmation, production tracking, strict 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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