Product Description
Fully/ Semi Automatic Steel Pipe HDG Line (Hot-Dip Galvanizing Production Line)
Trust Signals & Badges:
CE & ISO Certified | Up to 15% Zinc Saving | Full & Semi-Automatic Options | Turnkey Project Solutions
Product Overview:
Our high-performance Steel Pipe HDG Line delivers uniform, long-lasting corrosion protection for round, square, and rectangular steel pipes. Engineered with automated handling systems, precise thermal control, and high-pressure inner/outer wiping mechanisms, our hot-dip galvanizing plants minimize zinc consumption, reduce labor costs, and optimize total output.
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Key Features & Advantages
Optimized Zinc Utilization: Advanced automatic steam/air wiping systems control coating thickness precisely, saving up to 15% in zinc consumption while maintaining strict ISO 1461 standards.
Eco-Friendly & Safe Operation: Fully enclosed acid-pickling rooms and zinc kettle fume collectors equipped with wet scrubbers keep exhaust emissions well within global environmental regulations.
Flexible Capacity Range: Adaptable to various pipe diameters (1/2" to 8" / 15 mm - 219 mm) with customizable annual capacities ranging from 30,000 to 150,000 metric tons.
Turnkey Engineering Support: We provide complete end-to-end services, including factory layout planning, equipment manufacturing, on-site installation, commissioning, and staff training.
Technical Specifications
Production Workflow (Step-by-Step Process)
1. Pre-Treatment Section
Degreasing: Removes oil and organic contaminants from steel surfaces.
Acid Pickling: Removes rust and mill scale using diluted HCl or H2SO4.
Rinsing & Fluxing: Neutralizes residual acid and applies flux solution to prevent oxidation.
Drying: Preheats pipes to reduce thermal shock before galvanizing.
2. Galvanizing Section
Automatic Immersion: Pipes are smoothly fed into the molten zinc bath.
Inner & Outer Wiping: High-pressure steam and air nozzles remove excess zinc from outer walls and inside bores.
3. Post-Treatment Section
Quenching & Cooling: Air and water cooling stabilize the coating layer.
Passivation: Prevents white rust storage stain (Chromate or Chrome-free options).
Inspection & Stacking: Final dimensional check, quality inspection, and automated bundle stacking.
Core Equipment Components
High-Efficiency Heating Furnace & Zinc Pot
Built with specialized boiler-grade steel plates to resist molten zinc corrosion. Features pulse firing burner technology for uniform multi-zone heating, extending kettle lifespan and saving fuel.
Automated Pipe Transport Mechanism
Integrates kick-in, star-wheel transport, and kick-out mechanisms. Ensures smooth pipe flow through the zinc bath without manual handling, raising production speed and operational safety.
Environmental Emission Control System
Sealed enclosures capture acid fumes and zinc smoke during the dipping process. Advanced scrubbers wash and filter air contaminants before releasing clean air, satisfying local EPA and EU environmental audits.
Frequently Asked Questions (FAQ)
Q1: What is the average lead time for a complete Steel Pipe HDG Line?
A: Manufacturing and shop assembly usually take 90 to 120 days depending on customization and automation degree. On-site installation, testing, and commissioning take an additional 30 to 45 days.
Q2: Can one HDG line process both round and rectangular tubes?
A: Yes. Our transport systems and wiping equipment are adjustable to handle round, square, and rectangular structural steel tubing with simple parameter modifications.
Q3: How do you help us comply with local emissions and environmental standards?
A: We design fully contained pickling areas and zinc furnace fume suction hoods integrated with acid mist scrubbers and baghouse filters to meet strict local EPA and EU regulatory standards.
