- Boiler tubes, wrought, made from purchased iron
- Conduit, welded and lock joint, made from purchased iron or steel
- Pipe (e.g., heavy riveted, lock joint, seamless, welded) made from purchased iron or steel
- Tube (e.g., heavy riveted, lock joint, seamless, welded) made from purchased iron or steel
- Tubing, mechanical and hypodermic sizes, cold-drawn stainless steel, made from purchased steel
- Well casings (e.g., heavy riveted, lock joint, welded, wrought) made from purchased iron or steel
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