PRINCIPAL PRODUCTION

- Weld overlay on all weldable base material with: high nickel, cobalt and copper alloys - stainless steels - carbon steels and low alloy steels.
- Butt welding up to 250 mm wall thickness using carbon steel, low alloy steel, stainless steel and Ni-based alloy.
- Refurbishment and reparations requiring preheating and/or post weld heat treatment.
- Stellite hardfacing on sealing area for components in a high temperature environment.
- Hardsurfacing using special alloys for components in severe wear or high impact loading.

On all above mentioned works we are able to carry out the following controls in house:
- NDT controls: UT, PT, MT performed by our II Level ASNT/EN personnel
- Ferrite control by FISHER Ferritoscope (magnetic method)
- Hardness measurement by EQUOTIP instrument
- Thickness measurement by FISHER Deltascope MP10 (for non-magnetic material)
- Oxygen content measurement for butt weld using gas backing protection.

WELDING PROCESSES
Submerged arc (SAW) process with single wire
Submerged arc (SAW) process with double wire: twin arc or tandem arc
Submerged arc (SAW) process with strip

GTAW manual and automatic: this procedure allows us to surface on an internal diameter from 32 mm and over.

GMAW manual and automatic pulsed arc with solid and flux cored wires.

PRINCIPAL APPLICATIONS
• Overlay by wire or strip on balls, bodies and flanges for valves
• Overlay by wire or strip on tube sheets and bottom head
• Wire overlay on internal diameter of flanges, gates, tubes, bends etc. with the following limits:
- Internal diameter 1-1/2" max length 500 mm
- Internal diameter 2" max length 800 mm
- Internal diameter 3" max length 1500 mm
Note: the above internal diameter and max length are only indicative as it is possible to evaluate solutions to extend the limits.
• Robotized welding overlay on nozzles with horizontal axis fixed and welded to vessel.
• In hard wearing applications we carry out high thickness hardfacing (up to 100 mm) by special technique and complex carbides alloys.
• Butt weld by SAW process and “narrow gap” technique up to 250 mm thickness.
• Butt weld body/closures for “fully welded” valves by automatic equipment with 2 welding heads using a glycol cooling system in order to prevent overheating the seats and ball.