Manufacture of Domed Ends: with drawing presses or spinning machines
Welding: Automatic sub-merged arc welding for body circumferential seam
Surface Treatment: shot blasting, zinc metalizing with electric arc or flame-type spray plants, spray painting or powder coating
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Manufacture of Bodies: from steel plates, with guillotine shears and rolling machines
Assembly: domed ends and body are assembled on hydraulic devices
Hydrostatic Pressure Testing: on special, individual test benches
Quality Assurance:
- Raw material test
- Hydraulic volumetric expansion test
- Radiographic examination
- Tightness test
- Gassing against inside corrosion
- Surface coating adhesion test
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