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:

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:

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:

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:

1. Pressure test results (Leak & Burst Test)
2. Tinplate thickness + internal lacquer suitability
3. Weld seam quality and coating coverage
4. Valve and actuator compatibility
5. Printing durability (Rub Test)

If these five areas pass, the product is generally safe and reliable.