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Pipe or Tube Mfg. – Iron or Steel & DriversDescription
Code 3028 applies to employers engaged in manufacturing iron or steel pipes or tubes. It includes the manufacturing of both seamed and seamless pipes and tubing by means of a hot or cold drawing process or roll forming and welding processes. Manufacturing flexible steel tubing is also included under this classification.
Also contemplated by this classification is manufacturing cast iron pipes using centrifugal force. While various processes are utilized, the only difference is in the type of molds used in the centrifugal casting machines. To perform this process, scrap and pig iron are melted in furnaces. All centrifugal cast pipe must be cast in high speed revolving molds. The pipes are then ground, heat treated, pressure tested and coated.
Assignment by Analogy
• Gas pipe – iron or steel – not cast
• Metals – ferrous (iron or steel)
• Steam – mains or pipelines – iron or steel
Operations to be Separately Rated
- Manufacturing:
- Iron or steel making. Refer to Code 3004 “Iron or Steel Mfg. – Steelmaking & Drivers.”
- Lead pipe or tube. Refer to Code 3027 “Rolling Mill – NOC & Drivers.”
- Pipe or tube made from non-ferrous metals. Refer to Code 3022 “Pipe or Tube Mfg. – NOC & Drivers.”
Plastic pipe – extruded. Refer to Code 4459 “Plastics Mfg. – Sheets, Rods, or Tubes.” - Plumbers’ pipe, pipe fittings and supplies. Includes threading and cutting of plumbers’ type pipe. Refer to Code 3188 “Plumbers’ Supplies Mfg. – NOC.”
- Sewer lines, soil lines or water main pipe – iron or steel. Refer to Code 3081 “Foundry – NOC – Ferrous.”
Wooden tobacco pipe. Refer to Code 2790 “Pattern Making – NOC.”
Pipe bending or cutting by a specialty contractor. Threading and cutting pipe – not plumbers’ type pipe by a specialty contractor. Refer to Code 3111 “Blacksmith.”