Product Overview
Unlike untreated steel chains that are vulnerable to rust and surface degradation when exposed to rain, humidity, and temperature changes, our galvanized swing chains use a protective hot-dip galvanized coating to improve corrosion resistance while maintaining the mechanical strength required for repeated swinging movement.
Our hot dip galvanized HDG swing chains are engineered specifically for high frequency outdoor playground applications. Built from premium Q235 and Q345 carbon steel, every link is precision welded, deburred, and fully coated with molten zinc to deliver maximum fatigue resistance, child safety, and long term durability in all weather conditions.
Mechanical and Dimensional Data
|
Wire Diameter |
Link Type |
Pitch / Inside Length | Inside Width | Working Load Limit (WLL) | Minimum Breaking Load | Approximate Weight |
|
5 mm |
Short Link |
19.0 mm |
6.0 mm |
250 kg |
1,000 kg (10 kN) | 0.50 kg/m |
|
6 mm |
Short Link |
21.0 mm |
7.2 mm |
400 kg |
1,600 kg (16 kN) | 0.80 kg/m |
|
8 mm |
Medium Link |
24.0 mm |
9.6 mm |
750 kg |
3,000 kg (30 kN) | 1.40 kg/m |
|
10 mm |
Medium Link |
30.0 mm |
12.0 mm |
1,250 kg |
5,000 kg (50 kN) | 2.20 kg/m |
Surface Protection and Galvanizing Standards
Coating Standard: Hot Dip Galvanized to ISO 1461 / ASTM A153
Zinc Coating Thickness: Average 65 to 85 um (Exceeds standard 45 um requirements)
Corrosion Resistance: Rated for 96+ Hours Neutral Salt Spray Test (NSS) without red rust
Compliance: ISO 9001:2015 certified production; EN 1176 and ASTM F1487 playground safety alignment
Key Advantages
Smooth and Burr Free Surface for Anti Pinch Protection
Chain joints undergo secondary mechanical deburring and weld seam grinding before galvanizing. This eliminates sharp flash, zinc drips, and rough spots, preventing finger pinching, scratches, or clothes snagging during play.
Deep Zinc Fusion for High Friction Points
Swing chain links grind against each other constantly. Our hot dip immersion process creates a multi-layer zinc-iron alloy zone that chemically bonds with the steel substrate. This offers superior abrasion resistance compared to standard electro-galvanized or powder-coated alternatives.
Structural Integrity Under Dynamic Loads
Formed with automatic flash butt welding, each weld seam achieves the same tensile strength as the base steel core, ensuring zero link separation under violent or sudden impact loads.
Surface Protection Comparison
|
Feature |
Hot Dip Galvanized (HDG) |
Electro-Galvanized (EG) |
Plastisol / PVC Coated |
|
Primary Advantage |
Long term weather and friction resistance |
Lower initial cost |
Soft touch and bright colors |
|
Zinc Thickness |
65–85 μm |
5–15 μm |
Thin plating + Polymer layer |
|
Friction Wear Life |
10+ Years |
1–2 Years |
High wear if vinyl cracks |
|
Outdoor Suitability |
High humidity, rain, UV, seasonal frost |
Indoor or dry temporary use |
Public parks and residential play sets |
|
Recommended Use |
Commercial Playgrounds and Municipal Parks |
Light Residential |
Toddler Swings and Color Coded Sets |
OEM Customization and Supply Capability
Pre-Cut Lengths: Custom cut to exact link counts (such as 1.5m, 1.8m, 2.0m) with strict tolerance control to save on-site assembly time.
Plastisol / Rubber Coating: Half-length or full-length soft PVC / Plastisol dipping available in custom RAL colors (Red, Blue, Yellow, Green) for enhanced finger protection.
Hardware Integration: Pre-assembled hardware options available, including C-hooks, quick links, swivel shackles, and anti-wrap brackets.
Packaging: Heavy-duty gunny bags, plastic drums, steel-banded wooden crates, or retail-ready barcoded cartons.
Quality Assurance and Factory Documentation
Mill Test Certificate (MTC) matching EN 10204 3.1 detailing chemical composition and tensile strength.
Proof Load and Breaking Test Reports per production batch.
Zinc Coating Thickness Test Logs via magnetic gauge measurements.
FAQ
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