North American Product Classification System (NAPCS) Canada 2017 Version 2.0
- 312 - Basic and semi-finished iron or steel products
- 31213 - Ferrous metal castings
- 312131 - Pipes and fittings of ductile iron or cast iron
- 3121311 - Pipes and fittings of ductile iron or cast iron
- 312132 - Grey iron products (except pipes and fittings)
- 3121321 - Grey iron products (except pipes and fittings)
- 312133 - Other iron castings
- 3121331 - Other iron castings
- 312134 - Steel castings
- 3121341 - Steel investment castings
- 3121342 - Carbon steel castings (except investment)
- 3121343 - Alloy steel castings (except investment)
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