Buying Tips for Tinplate Aerosol Cans
Tinplate aerosol cans (3-piece tinplate cans) are classified as pressure packaging containers, so purchasing them requires strict attention to material quality, pressure resistance, welding stability, internal lacquer, valve compatibility, and transport safety.
Below are the essential points every buyer should check before placing an order.
Structure & Specifications
1. Confirm standard dimensions
Common diameters: 45/52/57/60/65/70 mm
Height: 100–300 mm
Make sure size and structure meet local market requirements (EU/US/SEA).
2. Tinplate thickness
Typical thickness:
- 0.18 / 0.20 / 0.22 / 0.23 mm
Recommended:
- Daily chemical products: 0.20–0.22 mm
- Industrial/automotive chemicals: 0.22–0.23 mm
Pressure & Safety Standards
1. Request a full pressure test report
Reports must include:
|
Test |
Standard Requirement |
|
Leak/Pressure Resistance Test |
≥ 12 bar (industrial products 15–18 bar) |
|
Burst Test |
≥ 18–22 bar |
If a supplier cannot provide these tests, do NOT purchase.
2. Bottom dome quality
Check for:
- Uniform deep drawing
- No deformation or dents
- No sharp edges or burrs
The can bottom supports most of the internal pressure.
Tinplate Material & Internal Lacquer
Correct internal lacquer
Internal coating must match chemical properties:
|
Product Type |
Recommended Internal Lacquer |
|
LPG (propane/butane) |
Epoxy lacquer |
|
Brake cleaner / Engine cleaner |
Gold anti-corrosion lacquer |
|
Insecticide |
Food-grade epoxy |
|
Strong solvents |
Epoxy-phenolic lacquer |
Cans without proper internal lacquer will corrode over time.
Welding Quality
High-frequency automatic welding is mandatory
Check:
- Smooth welding line
- Full coating on welding seam
- No gaps or pinholes
Printing & Appearance
1. Color consistency & gloss quality
Check for:
- Color uniformity
- No oil marks, smudging, or misalignment
2. Surface defects
Reject cans with:
- Scratches
- Dents
- Rim deformation
Any damage may affect pressure stability.
Valve & Actuator Compatibility
Even a high-quality can will fail if the valve is incompatible.
1.Valve size
Standard valve: 1-inch (25.4 mm)
2. Actuator selection
Must match the viscosity and application:
|
Product |
Recommended Actuator |
|
Spray paint |
Fan-shaped nozzle |
|
Foam |
Foaming actuator |
|
Lubricating oil |
Straw/extension tube actuator |
Supplier Capability & Quality Control
1. Manufacturing automation level
Prefer factories with:
- Automatic welding
- Automatic leak testing
- Vision inspection systems
- Automatic seaming & necking
Higher automation = more stable quality.
Top 5 Critical Points You MUST Confirm
To avoid 90% of quality issues:
- Pressure test results (Leak & Burst Test)
- Tinplate thickness + internal lacquer suitability
- Weld seam quality and coating coverage
- Valve and actuator compatibility
- Printing durability (Rub Test)
If these five areas pass, the product is generally safe and reliable.