Specific tariff heading prevails over residuary classification, with machine parts and seals classified under their own headings.

A specially designed impeller packing for a gas compressor was classified with the machine itself, because the specific heading for gas compressors and their parts prevailed over the residuary heading for steel articles under Note 2(b) of Section XVI. By contrast, a shaft seal was classified under the specific heading for gaskets, jointings and seals, since a specifically described article must be placed in its own heading rather than under the parent machine heading, applying Note 2(a) of Section XVI. The result was partial relief: classification of impeller packing was accepted, while classification of shaft seal was confirmed against the assessee.

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Issues: (i) Whether impeller packing, being a specially designed part of a gas compressor, was classifiable under the residuary heading for steel articles or under the more specific heading covering gas compressors and their parts; (ii) Whether shaft seal, being a seal, was correctly classified under the specific heading for gaskets, jointings and seals rather than under the heading relating to the parent machine.

Issue (i): Whether impeller packing, being a specially designed part of a gas compressor, was classifiable under the residuary heading for steel articles or under the more specific heading covering gas compressors and their parts.

Analysis: Impeller packing was found to be a specially designed part of a gas compressor. The specific heading covering gas compressors was held to prevail over the residuary heading for steel articles. By applying Note 2(b) of Section XVI of the Customs Tariff Act, 1975, parts specially designed for a particular machine were treated as classifiable with that machine where the specific heading was more appropriate.

Conclusion: Classification under heading 84.11(1) was accepted, and consequential relief was held to follow in favour of the assessee.

Issue (ii): Whether shaft seal, being a seal, was correctly classified under the specific heading for gaskets, jointings and seals rather than under the heading relating to the parent machine.

Analysis: Shaft seal fell within the specific heading for gaskets, jointings and seals. The presence of a specific heading for the article itself excluded classification under the heading for the parent machine. Note 2(a) of Section XVI of the Customs Tariff Act, 1975 was applied on the basis that a specifically described part must be classified under its own heading when such a heading exists.

Conclusion: The classification under heading 84.64 was confirmed against the assessee.

Final Conclusion: The appeal succeeded only on the classification of impeller packing and failed on the classification of shaft seal, resulting in partial relief.

Ratio Decidendi: Where a tariff item is specifically covered by a heading, that specific heading prevails over a residuary or parent-machine heading for purposes of customs classification.

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