Introduction and Industry Applications of 5–25L Metal Pails (Steel Pails / Tinplate Metal Pails)
5–25L metal pails are classified as small-to-medium-sized industrial metal packaging containers. Common specifications include 5L, 8L, 10L, 15L, 18L, 20L, and 25L capacities. They are available in two main structural designs-open-head (removable lid) and tight-head (fixed lid)-and are widely used across industries such as chemicals, coatings, oils and greases, construction materials, and food. These drums are suitable for UN-certified hazardous materials packaging and can accommodate liquids, pastes, powders, and granular materials.
I. Product Overview
1. Materials
Body: Cold-rolled steel sheet or tinplate (tin-coated steel); wall thickness of 0.32–0.4 mm; body features rolled reinforcing ribs to enhance impact resistance and stacking strength.
Inner Wall: Options include standard baked finish, epoxy-phenolic coating, food-grade coating (BPA-free), or steel-plastic composite lining, suitable for various corrosive materials.
Outer Wall: Baked finish or galvanization; supports screen printing of logos and shipping marks.
Seals: Nitrile rubber or food-grade silicone sealing rings, ensuring leak-proof and evaporation-proof performance.
2. Comparison of Two Major Metal Pails Types
① Open-head Steel Pails
Structure: Fully removable top lid; secured by a lever-lock or bolt-lock ring; equipped with handles; features a wide opening.
Advantages: Convenient for adding, mixing, and scooping out materials; easy to clean the interior; stackable.
Disadvantages: Slightly less effective at preventing evaporation compared to tight-head metal pail.
Suitable for: High-viscosity pastes, resins, putties, adhesives, and solid powders.
② Tight-head steel pails
Structure: Non-removable head; features two small threaded openings at the top (filling port and vent) sealed with screw plugs; no large opening.
Advantages: Excellent sealing performance; resistant to evaporation and leakage; supports UN certification for dangerous goods (UN1A2); suitable for the maritime and overland transport of hazardous materials.
Disadvantages: Contents cannot be scooped out directly; suitable only for liquid materials.
Suitable for: Solvents, thinners, lubricating oils, flammable liquids, and hazardous chemicals for export.
3. Key Certifications and Standards
Domestic standards: GB/T 325.1-2018 (Steel Pail Standard); food-grade products must comply with GB 4806.9-2016.
Hazardous goods export: UN1A2 certification (for packaging Class 3 flammable liquids and other hazardous materials); mandatory packaging performance testing required for export.
Exports to Europe and the US: REACH compliance and 94/62/EC Packaging Directive; for food applications: FDA compliance, EU 10/2011 food contact declaration, and BPA-free test reports.
4. Core Advantages
High mechanical strength; superior resistance to compression and drops compared to plastic drums; suitable for stacking during long-distance logistics.
Excellent barrier properties; prevents solvent evaporation and moisture ingress.
Available with food-grade coatings for edible oils and syrups.
Metal is recyclable and eco-friendly; supports brand logo printing.
Customizable dimensions, including drum height, diameter, and internal coating specifications.
II. Industry Applications
1. Coatings and Inks (Largest application sector)
Common specifications: 10L, 18L, 20L, 25L
Open-head Tinplate Pails: Water-based paints, industrial paints, color pastes, putties, body fillers, high-build coatings; easy to open for stirring and dispensing.
Closed-head UN drums: Solvent-based paints, curing agents, thinners, inks, flammable materials; used for domestic repackaging and export.
2. Chemicals and Adhesives
Specifications: Full range from 5L to 25L
Open-head: Epoxy resins, polyurethane adhesives, sealants, greases, paste-form chemical additives;
Closed-head UN drums: Organic solvents, cleaning agents, synthetic resins, catalysts, industrial additives; packaging for hazardous materials logistics.
3. Lubricants and Greases
Closed-head Metal Pails: Industrial lubricants, gear oils, hydraulic oils;
Food-grade lined drums: Edible oils, coconut oil, palm oil, honey, syrups, food additives (requires BPA-free, food-grade lining).
4. Construction Materials and Waterproofing
Open-head Metal Pails: Waterproofing coatings, construction adhesives, jointing compounds, flooring materials, color pastes; convenient for pouring and mixing at construction sites.
5. Agriculture and Household Chemicals
Open-head Metal Pails: Pesticide emulsifiable concentrates, fertilizer concentrates, raw materials for industrial detergents;
Closed-head drums: Agricultural solvents, disinfectant concentrates.
6. Food and Flavorings
Restricted to food-grade lined steel drums; standard baked-enamel drums are not suitable.
Packaging: Edible oils/fats, flavors and fragrances, syrups, bee products; exports to the EU require PPWR compliance and food-contact compliance documentation.
7. Export and Foreign Trade
General cargo: Standard baked-enamel open-head drums;
Flammable hazardous chemicals: UN1A2 closed-head steel drums (UN certificates and performance test reports provided); suitable for sea freight and container transport;
Food exports: Food-grade lining + BPA-free reports; meets EU and North American food-contact requirements.
III. Brief Selection Recommendations
Viscous materials or applications requiring stirring/scooping → Choose open-head metal pails with locking rings;
Solvents, volatile substances, hazardous materials, or export shipments → Choose tight-head UN-certified drums;
Food or edible oil → Must specify food-grade epoxy lining and BPA-free status; do not use standard industrial drums;
Corrosive materials → Prioritize modified linings or steel-plastic composite drums; avoid standard baked-enamel drums;
Exporting hazardous materials → Ensure the drum body bears the UN mark and obtain the packaging performance inspection certificate.
Compamy Certificate and Client Visiting
