Mining Pressure Systems (Pty) Ltd imported seamless carbon steel pipes manufactured in China. Historically, it cleared these pipes duty free under tariff heading (TH) 7304.39.35. After a customs inspection in 2018, the Commissioner for the South African Revenue Service issued a tariff determination classifying the pipes under TH 7304.19.90 as ‘line pipe of a kind used for oil or gas pipelines’, attracting a 10% customs duty. Mining Pressure Systems appealed the determination to the Gauteng Division of the High Court under s 47(9)(e) of the Customs and Excise Act 91 of 1964. The High Court upheld the appeal and reclassified the pipes under TH 7304.39.35. The Commissioner appealed to the Supreme Court of Appeal.