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6.7.4.4.3. Shells of vacuum-insulated tanks of not more than 1,80 m in diameter shall be not less than 3 mm thick in the reference steel or of equivalent thickness in the metal to be used. Such shells of more than 1,80 m in diameter shall be not less than 4 mm thick in the reference steel or of equivalent thickness in the metal to be used.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-31 · Text as adopted (Official Journal); later amendments are not incorporated in this text.