Establishments primarily engaged in the production of welded or seamless steel pipe and tubes and heavy riveted steel pipe from purchased materials. Establishments primarily engaged in the production of steel, including steel skelp or steel blanks, tube rounds, or pierced billets, are classified in Industry 3312.
- Boiler tubes, wrought-mfpm
- Conduit: welded, lock joint, and heavy riveted-mfpm
- Pipe seamless steel-mfpm
- Pipe wrought: welded, lock joint, and heavy riveted-mfpm
- Tubes, seamless steel-mfpm
- Tubing, mechanical and hypodermic sizes- cold-drawn stainless
- Well casing, wrought: welded, lock joint, and heavy riveted-mfpm
- Wrought pipe and tubes: welded, lock joint, and heavy riveted-mfpm