Xenith Steel logo
Xenith Steel logo
Xenith Steel logo
Xenith Steel hollow section factory with high frequency welding and hot dip galvanizing lines in Cangzhou, Hebei Province
Hollow section factory production line with high frequency welding and roll forming equipment at Xenith Steel

Hollow Section Factory

State-of-the-art manufacturing · Full-process quality control

Alliances: Tata Steel (India), ArcelorMittal (Luxembourg), SSAB (Sweden/Finland), Nucor Corporation (USA), SALZGITTER AG (Germany)

  • Area: 90,000㎡
  • Number of workers: 300+
  • Main Products: Square & Rectangular Hollow Sections (ASTM A500, EN 10219, EN 10210), Steel Sheet Piles
  • Facilities: 76 high-frequency welding lines, 10 hot-dip galvanizing lines, 3 stretch-reducing/forming units, punching machines (2-station: 4 units, 6-station: 12 units, 9-station: 4 units), heat treatment furnaces, hydrostatic testing, X-ray & ultrasonic inspection
  • Applications: Structural construction, building frames, infrastructure, bridge & marine piling, prefabricated residential buildings, photovoltaic structural support, tower crane manufacturing, glass curtain wall engineering, airports, high-speed rail stations

Factory Introduction

Last updated: May 3, 2026

Xenith Steel's hollow section plant on a 90,000sqm site operates 76 high-frequency welded forming lines producing square and rectangular hollow sections from 20x20mm to 1200x1200mm, wall thickness 1.5-25mm, at 1M tons/year — one of Asia's largest single-site HS production facilities. Ten hot-dip galvanizing baths apply zinc coating 30-100μm per ASTM A123 and ISO 1461 for corrosion protection in outdoor, marine, and PV solar environments. Certified EN 10219/10210 (S235-S460), ASTM A500 Gr.A/B/C, CSA G40.21, JIS G3466, GB/T 6728/3094. Tata Steel, ArcelorMittal, SSAB, Nucor, and SALZGITTER AG source structural hollow sections from this plant for building frames, bridges, solar tracker structures, and modular construction.

Steel coils are formed into square and rectangular sections — including right-angle, sharp-angle, polygonal, and trapezoidal profiles — using automated forming and stretch-reducing units. Welds are executed via high-frequency welding (300-500 kHz), followed by heat treatment, hydrostatic testing, NDT inspection, straightening, beveling, marking, and coating. Hot-dip galvanizing provides zinc coatings of 30–100 μm per ASTM A123 and ISO 1461, ensuring long-term corrosion protection for outdoor and marine environments.

Specification

  • Square Sections: 20×20×1.0 mm – 1200×1200×50 mm
  • Rectangular Sections: 20×30×1.0 mm – 800×1400×50 mm
  • Special Sections: Right-angle, sharp-angle, polygonal, trapezoidal (≥60×60×3 mm)
  • Production Lines & Equipment: 76 high-frequency welded hollow section lines, 10 hot-dip galvanizing lines (zinc coating 30–100 μm), Punching machines: 2-station (4 units), 6-station (12 units), 9-station (4 units), Stretch-reducing/forming units: 3 units
  • Materials & Standards: ASTM A500 Gr.A/B/C, EN 10219 S235–S460, EN 10210, CSA G40.21, JIS G3466, GB/T 6728 / GB/T 3094 | Optional hot-dip galvanizing or coating for corrosion resistance

Production Flowchart

Hollow section manufacturing flowchart showing roll forming and high frequency welding process

Frequently Asked Questions about Hollow Section Factory

1. What is a hollow section and what types does Xenith Steel produce?

Xenith Steel produces three types of hollow sections:

(1) SHS (Square Hollow Sections) from 20×20mm to 1200×1200mm.

(2) RHS (Rectangular Hollow Sections) from 20×30mm to 800×1400mm.

(3) Special sections including right-angle, sharp-angle, polygonal, and trapezoidal profiles.

Xenith Steel also supplies hot-dip galvanized hollow sections with zinc coating of 30–100μm for outdoor and marine environments. All products comply with ASTM A500, EN 10219, EN 10210, CSA G40.21, JIS G3466, and GB/T 6728/3094.

2. How are hollow sections manufactured at Xenith Steel?

Xenith Steel manufactures hollow sections through an 8-stage continuous high-frequency welding process:

(1) Coil Preparation: Steel coils are uncoiled, leveled, and trimmed.

(2) Forming: The strip passes through roll forming stands shaping it into a tubular configuration.

(3) High-Frequency Welding: Edges are heated by 300-500 kHz current and forged under pressure to create a continuous longitudinal weld.

(4) Sizing: The welded tube passes through sizing stands to achieve final SHS or RHS dimensions.

(5) Cutting: Tubes are cut to 6–12m lengths using automated flying cut-off systems.

(6) Heat Treatment: Stress-relief annealing or normalizing improves mechanical properties.

(7) Finishing: Optional hot-dip galvanizing, painting, or coating.

(8) Inspection: Dimensional verification, weld testing, and mechanical property validation.

3. What is the production capacity of Xenith Steel hollow section factory?

Xenith Steel hollow section factory has 1,000,000 tons annual capacity with three production ranges:

(1) Square sections 20×20×1.0mm to 1200×1200×50mm.

(2) Rectangular sections 20×30×1.0mm to 800×1400×50mm.

(3) Special sections including right-angle, sharp-angle, polygonal, and trapezoidal profiles.

The 90,000㎡ facility employs 300+ workers and operates 76 HFW lines, 10 hot-dip galvanizing lines, 20 punching machines, and 3 stretch-reducing units. Materials include ASTM A500 Gr.A/B/C, EN 10219 S235–S460, EN 10210, CSA G40.21, JIS G3466, and GB/T 6728/3094.

4. Why is hot-dip galvanizing critical for hollow sections?

Hot-dip galvanizing immerses hollow sections in molten zinc at approximately 450°C, creating a metallurgically bonded zinc-iron alloy coating that protects steel through sacrificial anode action. Xenith Steel provides six benefits:

(1) Corrosion Protection: The zinc coating sacrificially protects the steel even when scratched.

(2) Longevity: Galvanized sections last 50+ years in rural environments and 20–25 years in marine settings without maintenance.

(3) Coating Thickness: 30–100μm per ASTM A123 and ISO 1461.

(4) Complete Coverage: All surfaces, corners, and edges receive uniform protection.

(5) Aesthetic Appeal: Bright silver finish for architectural use.

(6) Cost-Effectiveness: Eliminates recurring painting and maintenance, reducing total lifecycle cost.

5. What are the primary applications of Xenith Steel hollow sections?

Xenith Steel hollow sections serve eight major application categories:

(1) Structural Construction: Columns, beams, trusses, and frames for commercial and industrial buildings.

(2) Infrastructure: Bridge components, highway guardrails, sign supports, and lighting poles.

(3) Bridge and Marine Piling: Foundation piles for bridges, wharves, and offshore structures.

(4) Prefabricated Residential Buildings: Modular housing frames, wall studs, and roof trusses.

(5) Photovoltaic Structural Support: Solar panel mounting structures for farms and rooftop installations.

(6) Tower Crane Manufacturing: Mast sections, boom structures, and counterweight frames.

(7) Glass Curtain Wall Engineering: Mullions, transoms, and facade supports.

(8) Airports and High-Speed Rail Stations: Large-span roof structures and terminal frameworks.

6. What manufacturing equipment does the hollow section factory operate?

Xenith Steel hollow section factory operates six categories of production and testing equipment:

(1) 76 HFW Lines: Automated roll forming, welding, sizing, and flying cut-off systems for SHS, RHS, and custom profiles.

(2) 10 Hot-Dip Galvanizing Lines: Immersion tanks and zinc pots handling sections up to 1200mm with 30–100μm coating.

(3) Punching Machines: 20 CNC multi-station units including 2-station (4), 6-station (12), and 9-station (4) for custom hole patterns.

(4) Stretch-Reducing Units: 3 units for right-angle, sharp-angle, polygonal, and trapezoidal profiles.

(5) Heat Treatment Furnaces: Stress-relief annealing and normalizing.

(6) Inspection Equipment: Dimensional measurement, ultrasonic testing, and mechanical testing laboratories.