Tariff classification of sight flow indicators turns on essential function, not mere installation in a piping system.

Imported sight flow indicators fitted to pipes were held not to be pipe fittings merely because they formed part of a piping system. Their essential function was to indicate the flow, clarity and colour of liquids in industrial pipelines, so they were treated as instruments or apparatus for measuring or checking liquid flow. On that reasoning, classification under Heading 90.24(1) was preferred over Heading 74.07/08, which is confined to connecting pipe fittings such as joints, elbows, sockets and flanges. The contrary classification adopted below was rejected, and the assessee obtained the benefit of the classification under Heading 90.24(1).

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Issues: Whether the imported 'VISI-FLO' sight flow indicators were classifiable as pipe fittings under Heading 74.07/08 of the Customs Tariff Act, 1975 or as instruments or apparatus for measuring or checking the flow of liquids under Heading 90.24(1) of the Customs Tariff Act, 1975.

Analysis: Heading 74.07/08 covers tube and pipe fittings which serve as connecting pieces such as joints, elbows, sockets and flanges in piping systems. The imported goods, though fitted to pipes, were designed to indicate the flow, clarity and colour of liquids in industrial pipelines and were not mere connecting components. The catalogue description showed them to be specially designed devices or instruments used for monitoring liquid flow in chemical and other industrial plants, bringing them within the scope of Heading 90.24(1).

Conclusion: The goods were correctly classifiable under Heading 90.24(1) and not under Heading 74.07/08; the contrary classification adopted by the lower authorities was erroneous and is rejected in favour of the assessee.

Final Conclusion: The appeal succeeded and the assessee obtained consequential relief with the classification treated as one under Heading 90.24(1).

Ratio Decidendi: An imported article fitted to pipes is not a pipe fitting merely because it is installed in a piping system; if its essential function is to measure or indicate the flow or condition of liquids, it falls under the tariff entry for instruments or apparatus and not under the entry for pipe fittings.

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