| 2007 NAICS | 2012 NAICS | 2017 NAICS | Corresponding Index Entries | |||
| 332996 | 332996 | 332996 | Bends, pipe, made from purchased metal pipe | |||
| 332996 | 332996 | 332996 | Coils, pipe, made from purchased metal pipe | |||
| 332996 | 332996 | 332996 | Couplings, pipe, made from purchased metal pipe | |||
| 332996 | 332996 | 332996 | Fabricated pipe and pipe fittings made from purchased pipe | |||
| 332996 | 332996 | 332996 | Manifolds, pipe, made from purchased metal pipe | |||
| 332996 | 332996 | 332996 | Nipples, metal, made from purchased pipe | |||
| 332996 | 332996 | 332996 | Pipe and pipe fittings made from purchased metal pipe | |||
| 332996 | 332996 | 332996 | Pipe couplings made from purchased metal pipe | |||
| 332996 | 332996 | 332996 | Pipe fabricating (i.e., bending, cutting, threading) made from purchased metal pipe | |||
| 332996 | 332996 | 332996 | Pipe headers made from purchased metal pipe | |||
| 332996 | 332996 | 332996 | Tubes made from purchased metal pipe | |||
| 332996 | 332996 | 332996 | Wrought iron or steel pipe and tubing made from purchased metal pipe |