Wholesale Shallow Empty Three-Piece and Two-Piece Tin Cans for Tuna & Seafood

High-Precision Shallow Empty Tin Cans for Automated Seafood & Tuna Canning Lines

Grade Tin Cans is a professional OEM/ODM manufacturer supplying high-performance empty shallow tinplate containers for the global seafood processing, fish canning, and premium paste industries. We deliver ready-to-fill, open-top empty steel cylinders and seamless two-piece cans engineered specifically for high-speed automated lines packing tuna, sardines, mackerel, salmon, and potted meats. Designed with exceptional structural calibration, our empty cans ensure flawless seaming performance and long-term shelf safety under harsh maritime and processing environments.

Key Technical Highlights

• Advanced Internal Coatings for Sulfur and Seafood Protection

Marine proteins such as tuna and sardines release highly active sulfur ions during high-heat retort sterilization, which chemically reacts with ordinary steel to create black iron sulfide stains. Our empty seafood cans are applied with specialized aluminum-paste or zinc-oxide modified internal linings (C-enamel). This entirely isolates sulfur interactions, keeping the can interior pristine, metallic-clean, and appetizing when opened by consumers.

• Seamless Two-Piece and High-Precision Three-Piece Configurations

We offer seamless drawn and ironed (D&I) two-piece tinplate cans that eliminate side and bottom seams entirely, drastically reducing leakage risks on heavy-duty seafood lines. Our shallow three-piece cans feature laser-welded body seams with high micro-precision, providing unmatched radial rigidity for deep-vacuum packaging.

• Micrometer Flange Tolerances for Air-Tight Hermetic Seals

The top opening curl and flange profile of our empty shallow tins are strictly controlled under tight mechanical tolerances. This absolute dimensional consistency ensures that your factory's automatic high-speed closing machines can form a perfect, hermetic double-seam with the matching easy-open lids, completely ruling out post-cooling micro-leakage or vacuum loss.

• Heavy-Duty Multi-Tier Packing for Rim Protection

Shallow empty cans are highly susceptible to flange deformation or rim bending during rough sea freight transit. We implement a rigorous packaging protocol utilizing heavy-duty, multi-layered wooden pallets separated by thick rigid plastic-coated dividers and wrapped tightly with multi-layer tension film, guaranteeing that 100% of our empty tins arrive perfectly round and ready for your depalletizers.

Frequently Asked Questions (FAQ)

Q: Which is better for automated tuna filling lines: a seamless two-piece empty can or a three-piece empty can?

A: Seamless two-piece empty cans are highly favored for automated high-speed tuna and fish lines because they have no welded side seams or bottom seams, which lowers the mathematical risk of leakage to near zero during retort processing. However, our shallow three-piece welded cans offer greater flexibility if you need to adjust heights frequently for different net weight targets.

Q: Do you provide full-aperture easy-open ends (EOE) that are safe and easy for consumers to peel or pull?

A: Yes, we supply fully matched systems. Our empty shallow seafood cans can be paired with high-precision aluminum or tinplate easy-open lids featuring optimized score lines. These are engineered for smooth pop-and-pull strengths, minimizing consumer effort while maintaining excellent burst-pressure resistance during 121°C retort cycles.