Establishments primarily engaged in fabricating pipe and pipe fittings from purchased metal pipes by processes such as cutting, threading, and bending. Establishments primarily engaged in manufacturing cast iron pipe and fittings, including cast and forged pipe fittings which have been machined and threaded, are classified in Industry 3321; those manufacturing welded and heavy riveted pipe and seamless steel pipe are classified in Industry 3317; and those manufacturing products such as banisters, railings, and guards from pipe are classified in Industry 3446.

• Bends, pipe: fabricated from purchased metal pipe
• Coils, pipe: fabricated from purchased metal pipe
• Couplings, pipe: fabricated from purchased metal pipe
• Manifolds, pipe: fabricated from purchased metal pipe
• Nipples, metal pipe: except pressure and soil pipe
• Pipe and fittings, fabricated from purchased metal pipe
• Pipe headers, welded: fabricated from purchased metal pipe
• Pipe, fabricated from purchased metal pipe
• Piping systems, metal: for pulp, paper and chemical industries
• Sections, pipe: fabricated from purchased metal pipe
• Tube fabricating (contract bending and shaping); metal