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Pipe Drawing Shop No 2 (V-2)
Commissioned in December 1961. The shop puts out thin-walled, seamless, drawn, boiler, capillary pipes from low-alloy and carbon steels.
Process description on an example of pipes manufacture from steel 10 to size 26.5X1.5 (id 23.5) to TY 14-3-749 Specs (route 126 15)
Original tube stock, size 60X35.
Production process:
- Tube stock treatment before rolling in X?T mill.
- Pickling in sulfuric acid solution, baths Nos 1v5.
- Washing by dipping in cold running water (bath No 6).
- Copper-plating in copper vitriol solution (bath No 7).
- Washing by dipping in hot water (bath No 8).
- Phosphatizing (bath No 9).
- Neutralization in soda solution (baths Nos 10v11).
- Saponification by dipping (bath No 12).
- Rolling in X?T-55 mill to size 32X1.6.
- Degreasing.
- Annealing in shielding atmosphere in furnace No 11.
- Straightening of carbon and alloyed steel pipes in 20-114 rolling mill No 1.
- Ends trimming and cutting in model M? 65 abrasive cutting-off machines.
- Heads insertion in B-242 swaging machine.
- Chemical treatment before drawing on short mandrel (similar to treatment before rolling)
- Drawing to final size from 32X1.6 to 26.5X1.5 (id 23.5) on short mandrel in drawbench No 1 (force 8 tons), or in draw bench No 13 (force 12 tons)
- Degreasing.
- Preliminary drawing in ?? 24 rolling mill.
- Final drawing in BPM-115 or 10-60 roll mill.
- Pipe ends trimming and cutting in model M? 65 cutting-off machines.
- Acceptance by Quality Inspection Department.
- Packing.
- Finished products warehousing
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