Why do hazmat container regulations specify details like wall thickness and closure design rather than just overall strength?

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1. Wall thickness only matters for liquid tanks, not solid or gas containers
2. Because different hazards, like pressure, corrosion, or impact, each demand a different kind of container design to contain them safely
3. Because wall thickness only affects a container's weight, not its safety
4. Because these details only matter for containers used in humid climates

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