other interpretations used in various contexts.
Also "moulding" "final production "design" as the case may be.

Most likely to be moulding, pressing or, in the case of pipes, an extrusion process.

Shaping would be cutting to shape, machining or milling.

--------------------------------------------------
Note added at 2 hrs (2014-02-02 23:44:08 GMT)
--------------------------------------------------

This site also mentions injection moulding and sintering:

http://www.eurekanetwork.org/project/-/id/3417

More on moulding:
http://tinyurl.com/psa2xrg

More on extrusion:
http://www.pipeandprofile.com/

Pressing for concrete pipes:
http://www.hessgroup.com/en/schlosser-pfeiffer/products/conc...

--------------------------------------------------
Note added at 2 hrs (2014-02-02 23:47:17 GMT)
--------------------------------------------------

The following machines are also used in the production of barrels and large diameter tubing:

blow moulding machines,extrusion blow moulding machines, automatic blow moulding machines.

--------------------------------------------------
Note added at 2 hrs (2014-02-02 23:52:13 GMT)
--------------------------------------------------

To cover concrete pipes, although I suspect that we are talking about plastics here, we have the following five methods:

"Five Methods
As with all concrete products, the basic materials of concrete pipe are portland cement, aggregate, and water. There are five basic methods of producing concrete pipe. Four methods-centrifugal/spinning, dry cast, packerhead, and tamp-entail using a dry concrete mix. The fifth method, wet casting, uses a high-slump concrete mix. Wet-cast concrete mix usually has a slump less than four inches and is most frequently used for manufacturing large diameter pipe."

Source: http://www.cement.org/cement-concrete-basics/concrete-produc...

--------------------------------------------------
Note added at 5 hrs (2014-02-03 02:13:16 GMT)
--------------------------------------------------

Semifinished product in the case of steel could be rolled steel (coil), , sheet steel, steel wire, metallic powders, rods, billets etc. All of these in various types - mild steel, stainless steel, steel with particular additives like chrome or vanadium.

Pipes can, for example, be pressed, welded, wound, extruded, wrought or forged.

--------------------------------------------------
Note added at 11 hrs (2014-02-03 09:06:51 GMT)
--------------------------------------------------

It remains semifinished products in whatever kind of steel is used.

These particular types of steel have certain properties, like resistance to induced radioactivity and low magnetisation, that are particularly useful in radioactive environments.

Their key feature is that the amount of radioactive isotopes with long half-lives produced in the steel as a result of exposure to radioactivity is much less than in conventional steels.

This, in turn, makes components (pipes, drums), manufactured from such steels a much better proposition for subsequent disposal, as the radioactive isotopes they then contain decay within a relatively short time.

--------------------------------------------------
Note added at 19 hrs (2014-02-03 16:58:46 GMT)
--------------------------------------------------

SORRY! I'm mixing two questions here - the semi-finished bits belong to another question