North American Product Classification System (NAPCS) Canada 2017 Version 1.0
- 312 - Basic and semi-finished iron and steel products
- 31214 - Iron and steel pipes and tubes (except castings)
- 312141 - Iron and steel pipes and tubes for oil and gas (except castings)
- 3121411 - Iron and steel pipes and tubes for oil and gas (except castings)
- 312142 - Iron and steel pipes and tubes (except castings and oil and gas pipes and tubes)
- 3121421 - Iron and steel pipes and tubes (except castings and oil and gas pipes and tubes)
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