Hebei Huayang Steel Pipe Co., Ltd is one of the most experienced manufacturers and suppliers of 76-660mm hfw straight welded pipe scaffolding & greenhouse steel pipe in China. Welcome to buy discount 76-660mm hfw straight welded pipe scaffolding & greenhouse steel pipe made in China here from our factory. Quality products and low price are available.
Product introduction
Product Description
76-660mm HFW Straight Welded Pipe Scaffolding & Greenhouse Steel Pipe is high-frequency straight welded structural steel pipe specially designed for building scaffolding systems, agricultural greenhouse frames, farm support frames and various light-load structural projects. The outer diameter fully covers 76mm to 660mm mainstream structural calibers, mainly made of Q195, Q215B and Q235B carbon structural steel, compliant with GB/T 3091, EN39, BS1139, ASTM A500 structural pipe standards.
Adopting advanced HFW high-frequency solid-state welding process, the welding seam forms complete metallurgical fusion with the pipe body, with online internal and external burr removal and weld stress relief treatment to eliminate welding residual stress. All finished pipes pass flattening test, cold bending test and weld non-destructive inspection, with stable bearing capacity and excellent anti-deformation performance. Multiple surface treatments including black anti-rust oil, spray paint and hot-dip galvanized are optional; galvanized pipe has strong anti-rust and anti-corrosion ability, perfectly adapting to humid agricultural greenhouse environment and outdoor construction sites. With full size range, stable batch quality and ultra-high cost performance, this series HFW pipe is the preferred structural material for construction scaffolding and agricultural greenhouse engineering bulk procurement.
1. Basic Product Specifications
Product Name: 76-660mm HFW Straight Welded Pipe Scaffolding & Greenhouse Steel Pipe
Executive Standards: GB/T 3091, JGJ130, EN39, BS1139, ASTM A500 Grade B
Outer Diameter Range: 76mm ~ 660mm complete structural pipe sizes
Conventional Wall Thickness: 2.0mm – 16mm, customized thickened wall for heavy load support
Steel Grades: Q195, Q215B, Q235B (mainstream), Q355B for heavy load structure
Production Process: HFW high-frequency straight seam welding, online internal & external burr removal, weld stress relief heat treatment
Standard Length: 6m / 9m / 12m; custom fixed length within 12m supported
Main Application Scenarios: Construction scaffolding frame, agricultural greenhouse skeleton, farm support bracket, municipal guardrail, temporary engineering support, light steel structure frame
Load Characteristic: Static load bearing, structural support, non-pressure structural use
Pipe End Treatment: Plain burr-free cut ends, plastic anti-collision end caps
Surface Treatment Options: Black anti-rust oil, red/grey anti-rust spray paint, hot dip galvanized (zinc layer 180–350g/㎡)
Core Features: Full 76–660mm caliber series, HFW integrated defect-free weld, strong bending & compression resistance, multiple anti-rust customization, easy cutting & welding, factory bulk supply, low engineering comprehensive cost
2. Core Product Advantages
2.1 Complete 76–660mm Full Size Series, One-Stop Procurement
Covers all common medium and large diameter specifications for scaffolding and greenhouses, matching various frame design requirements. Customers can complete all caliber purchases from one factory, simplify purchasing procedures, reduce multi-supplier logistics and communication costs, and shorten project construction preparation cycle, suitable for large batch construction and agricultural park projects.
2.2 Stable Carbon Steel Material, Excellent Structural Bearing Performance
Mainstream Q235B carbon steel has uniform internal texture, balanced strength and toughness, outstanding cold bending, cutting and welding performance. It will not crack or deform during bending, drilling and on-site assembly; Q355B thickened wall option is available for heavy-load large greenhouses and high-rise scaffolding to meet higher load-bearing safety standards.
2.3 Advanced HFW Welding Technology, Integrated Stable Pipe Body
Flux-free high-frequency resistance welding realizes seamless metallurgical combination between weld and pipe body, weld strength close to base metal. Online stress relief heat treatment eliminates welding residual stress, avoiding weld fracture under long-term alternating load. 100% weld flaw detection ensures no hidden defects, greatly improving the overall safety of scaffolding and greenhouse frames.
2.4 High Dimensional Accuracy, Convenient On-site Assembly
Precision rolling and sizing process strictly control OD, wall thickness and straightness tolerance. Smooth inner and outer walls without burrs, flat cut ends without deformation, perfectly matched with scaffolding couplers, greenhouse connectors and flange fittings, reducing secondary processing on site and improving construction efficiency.
2.5 Diversified Anti-Rust Treatment Adapt to Different Environments
Black oil / painted pipe: Low cost, suitable for indoor temporary scaffolding and short-term use greenhouses
Hot dip galvanized pipe: Thick zinc layer isolation from moisture, acid and alkali, anti-rust service life up to 15–20 years, specially suitable for humid greenhouse, coastal and rainy outdoor construction sites
2.6 Ultra-High Cost Performance for Bulk Engineering
Automated HFW mass production reduces procurement cost compared with seamless structural pipes, while fully meeting scaffolding and greenhouse load safety standards. Stable yield rate, low defective rate and almost no later maintenance cost, the most cost-effective structural steel pipe for construction companies and agricultural greenhouse manufacturers.
3. Dimensional Tolerance Standard
|
Inspection Item |
Standard Tolerance |
|
Outer Diameter (76mm–168mm) |
±0.8% nominal OD |
|
Outer Diameter (168mm–660mm) |
±1.0% nominal OD |
|
Wall Thickness |
±10% of nominal thickness |
|
Pipe Straightness |
≤1.5mm per meter |
|
Out-of-Roundness |
≤1.0% of outer diameter |
|
Cutting Length |
+100mm / −0mm |
4. Mechanical & Chemical Properties
4.1 Mechanical Properties
|
Steel Grade |
Min. Yield Strength |
Tensile Strength |
Min. Elongation |
Mandatory Factory Test |
|
Q195 |
≥195MPa |
315–430MPa |
≥27% |
Flattening test, cold bending test, weld NDT inspection |
|
Q235B |
≥235MPa |
375–500MPa |
≥26% |
Flattening test, 180° cold bending test, weld UT inspection |
|
Q355B |
≥355MPa |
470–630MPa |
≥21% |
Flattening test, impact test, full weld inspection |
4.2 Maximum Allowable Chemical Composition (Mass %)
|
Grade |
C Max |
Si Max |
Mn Max |
P Max |
S Max |
|
Q195/Q235B |
0.22 |
0.35 |
1.40 |
0.045 |
0.045 |
|
Q355B |
0.20 |
0.55 |
1.60 |
0.040 |
0.040 |
Note: All pipes pass 180° cold bending test without cracks, fully meet the safety requirements of scaffolding and greenhouse frame structures.
5. Manufacturing Process
Raw Material Inspection: Adopt qualified Q195/Q235B/Q355B hot rolled steel strips, strictly test chemical composition and mechanical properties to eliminate unqualified raw materials.
Slitting & Edge Finishing: Precision slitting according to pipe specifications, smooth edge oxide removal to guarantee uniform welding gap.
Multi-Roll Continuous Forming: Gradual rolling molding to ensure uniform roundness and consistent wall thickness of pipe blank.
HFW High-Frequency Welding: Closed-loop automatic parameter control to realize full penetration high-strength metallurgical weld.
Internal & External Weld Burr Removal: Online mechanical scarving to clear welding flash for smooth pipe surface.
Weld Stress Relief Heat Treatment: Eliminate welding residual stress, improve weld toughness and anti-cracking performance.
Sizing & Straightening: Precision sizing and straightening to control dimensional tolerance within standard range.
Fixed-Length Cutting: Neat burr-free cutting according to customer customized length.
Full Structural Performance Inspection: Weld non-destructive testing, flattening test, cold bending test and full dimensional re-inspection.
Surface Treatment & Marking: Anti-rust oil spraying, paint or hot dip galvanized processing; laser permanent marking of size, steel grade and batch number.
Export Standard Packaging: Waterproof PE wrapping, high-strength steel strip bundling, plastic end caps for long-distance sea and land transportation.
6. Main Application Scope
Construction Industry: Building exterior scaffolding, interior support frame, temporary construction platform, formwork support pipe
Agricultural Greenhouse Engineering: Single-span/multi-span greenhouse skeleton, vegetable & flower greenhouse support bracket, agricultural irrigation frame
Municipal Engineering: Road guardrail, landscape support frame, park light pole base, municipal temporary support structure
Farm & Animal Husbandry: Livestock breeding shed frame, farm storage warehouse support, agricultural machinery support frame
Light Steel Structure: Small factory frame, warehouse shelf base, mechanical equipment chassis structural pipe
Global EPC Projects: Overseas construction scaffolding, agricultural greenhouse park bulk procurement projects
7. Quality Inspection & Certification
Fully compliant with GB/T 3091, JGJ130, EN39, BS1139 structural steel pipe standards
ISO 9001 quality management system certified full production line
100% weld non-destructive inspection + flattening & cold bending mechanical safety test
Complete Mill Test Report (MTR) and factory qualification certificates supplied with each batch
Support SGS, BV third-party sampling inspection and construction & agricultural project acceptance
Full batch traceability record from raw steel strip to finished pipe delivery
8. Packaging & Delivery
Packaging: Black painted/oiled pipes wrapped with waterproof PE film, bundled with high-strength steel strips; hot dip galvanized pipes with thick wear-resistant protective film, plastic anti-collision caps at both ends.
Product Marking: Laser permanent marking including outer diameter × wall thickness, steel grade, standard, batch number and production date.
Trade Terms: FOB, CIF, CFR, DAP global sea and land delivery available
Shipping Ports: Tianjin, Qingdao, Shanghai, Ningbo
Customization Service: Custom fixed length, full set hot dip galvanized / anti-rust paint processing, special pipe end cutting
Delivery Cycle: Conventional stock specifications 3–7 working days; customized galvanized pipes 7–15 working days
9. Why Choose Our HFW Scaffolding & Greenhouse Steel Pipe
Complete 76–660mm full caliber series, one-stop bulk supply for scaffolding and greenhouse frame projects
Multiple steel grade options from Q195 light load to Q355B heavy load, match different frame bearing requirements
HFW high-integrity welding process, no weld cracking hidden danger, improve long-term structural safety
Strict structural safety testing (flattening & bending test), fully meet construction and agricultural engineering acceptance standards
Multiple anti-rust surface treatments, suitable for indoor, outdoor, humid greenhouse and coastal corrosive environments
Factory direct sales without intermediate markup, stable stock capacity, competitive price for large-scale bulk order cooperation
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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