YB/T 4250-2025All-hydrogen bell annealing furnace for metallurgy (English PDF)

YB/T 4250-2025 (All-hydrogen bell annealing furnace for metallurgy) is available as an English-translated PDF.

YB/T 4250-2025 — This standard specifies the terminology and definitions for all-hydrogen bell-type annealing furnaces used in metallurgy, and outlines the classification, marking, technical requirements, performance requirements, complete set requirements, inspection items and methods, marking, packaging, transportation, storage, installation, and maintenance of bell-type furnaces.

This standard applies to bell-type furnaces used in the metallurgical industry for annealing cold-rolled carbon steel sheets and strips, stainless steel cold-rolled and hot-rolled sheets and strips, alloy sheets and strips, wire rods, pipes, and some non-ferrous metal materials using resistance heating or gas combustion as the heat source and hydrogen as the protective atmosphere.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.

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