Knowledge Base
Quality Control Tests for Can Shell and End Manufacturing
What Quality Control Tests Are Required for Can Shell and End Manufacturing?
There is no single quality control test for can manufacturing. Consistent quality across food and beverage cans relies on a set of tests applied to both can shells and ends, because food and beverage cans must meet extremely tight tolerances. Even minor variations can cause leakage, loss of carbonation, opening failures, structural collapse under pressure, or contamination from coating defects.
To achieve full coverage, a quality control programme must span mechanical performance, coating integrity, dimensional accuracy, and functional usability.
The core tests are:
- Opening force testing – the force needed to open an end
- Buckle and burst pressure testing – the pressure an end withstands before it deforms or fails
- Enamel rater testing – the integrity and coverage of the internal protective coating
- Compound weight and placement testing – the amount and position of sealing compound
- Score residual measurement – the metal thickness beneath the score line
- Visual and dimensional inspection – shell geometry, dimensions, and surface defects
Each test targets a different risk. Together they help quality, R&D, and operations experts protect product performance and safety.
At Industrial Physics, that is our purpose – to protect the integrity of our customers’ brands and products.
Explore the full range of metal packaging test and measurement equipment.
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FAQs
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A complete programme covers opening force, buckle and burst pressure, enamel rater (coating integrity), compound weight and placement, score residual, and visual and dimensional inspection. Each targets a different risk – strength, sealing, coating, usability, or precision – so all are needed for full coverage.
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Automated systems offer higher accuracy and repeatability, remove operator subjectivity, run faster cycles for high-speed lines, and provide real-time data for process optimization. They also reduce waste, labor costs, and production risk.
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Buckle pressure is the point at which an end or shell deforms, while burst pressure is the point at which it fails structurally. Both are measured by applying controlled air pressure to simulate real-world conditions during filling, storage, and transport.
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Coating integrity is checked with an enamel rater, which uses electrical conductivity to detect metal exposure, pinholes, and coating defects in the internal protective layer. The Torus Z604 enamel raters automate this for high-throughput inspection.
Related Articles
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Maintaining consistent quality in beverage and food can production requires a comprehensive set of quality control tests across both can shells and ends. This guide gives an overview of the essential tests and the inspection systems used across modern production lines, so you can build a multi-layered testing strategy with confidence. Why quality control is…
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Key terms Term Definition Can shell The drawn body of a two-piece can, before the end is seamed on. Can end The lid component, often an easy-open end, seamed onto the shell. Double seam The interlocked fold that joins the end to the shell to create a hermetic seal. Opening force The force needed to open an easy-open end, also…
