Precautions for 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.