Integral furnace component test applied to refractory bricks in a regenerator, confirming exemption eligibility for replacement parts.

Refractory bricks used in the regenerator of an end-fired regenerative glass melting furnace were treated as component parts of the furnace for exemption purposes. The Tribunal relied on technical literature, the ISI glossary, the manufacturer's description and composite machine principles to conclude that the regenerator and port assembly formed an integrated and necessary part of the furnace, not a separate independent heat-exchange unit. Because the furnace could not be repaired without shutting it down, the regenerator was regarded as part of the furnace structure. On that basis, denial of benefit under Notification No. 242/76-Cus was unjustified.

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Issues: Whether refractory bricks used in the regenerator of a glass tank furnace were component parts of the furnace so as to qualify for the benefit of Notification No. 242/76-Cus.

Analysis: The imported goods were intended for replacement in the regenerator of an end-fired regenerative glass melting furnace. The Tribunal compared the technical literature, the ISI glossary, the manufacturer's description, and the tariff principles applicable to composite machines and integral components. It held that the regenerator and port assembly functioned as an integrated and necessary part of the furnace, and that the regenerator was not a separate independent heat-exchange unit for customs classification purposes. Since the furnace could not be repaired without shutting it down, the regenerator was treated as part of the furnace structure rather than as an extraneous device.

Conclusion: The refractory bricks used in the regenerator were entitled to be treated as component parts of the furnace, and the denial of notification benefit was unjustified.

Ratio Decidendi: Where a regenerator is shown to be an integral constituent of a furnace and not a separate independent unit, replacement refractories used therein are classifiable as parts of the furnace for exemption purposes.

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