U-SHAPED GAS HEATER AND METHOD OF ITS ASSEMBLY Russian patent published in 2002 - IPC

FIELD: devices for heat treatment of steel; metallurgical and engineering works. SUBSTANCE: U-shaped gas heater includes U-shaped body with burner and recuperative branches ; it is connected with twin equipped with gas burner unit, recuperator with perpendicular flue branch pipe, attachment plate and compensator; burner branch of heater body is mounted in attachment plate at spaced relation and is connected with one side of compensator over entire section; other side of compensator is connected with gas burner unit body over entire section and is closed with hermetic box rigidly connected with gas burner unit body and attachment plate. Recuperator is provided with detachable unit having flanges at its ends which is mounted between attachment plate and twin; it is provided with flue branch pipe whose axis is perpendicular to axis of detachable unit. EFFECT: enhanced durability of U-shaped gas heaters; unification of heaters; reduced consumption of natural gas. 3 cl, 2 dwg