mechanised and orbital tig

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Segment: SemiconductorsTypical applications:• Joining of high purity tubing in the construction ofsemi-conductor chip manufacturing facilities.• Typical material is Stainless steel 304 and 316LAdvantages / Why Orbital TIG• High demands for purity in the chip manufacturingprocess.• Specialised orbital welding systems for welding in aclean room environment without generatingunacceptable levels of particles.ESAB equipment Typical heads Typical tube OD Typical thickness• Aristo MechTig C2002i PRH 6.0 - 25 mm 0.5 - 2.0 mm• MechControl 2 + Aristo MechTig 4000i PRH 6.0 - 25 mm 0.5 - 2.0 mm
CASE STORYWelding of heat exchangers at the chemical plant Azomures in RomaniaHastalloy C276, Tube ID-27 mmDescriptionAzomures used to buy heat exchangersand then produce by themselves. Thisresulted in lots of repairs due to hotcracking.By investing in a Mechanised TIGequipment from ESAB they are nowproducing heat exchangers on site. Theyhave increased the quality and reduced theproduction time!There are mainly four different ways ofwelding tube-to-tube sheets. Theapplication used here is where the tube isapplied at the back of the tube sheet. Thetool was made to weld internally at the backof the 300 mm tube sheet. The internal tubediameter is 26.7 mm and the wall thicknessincluding the backing that needed to bemelted is 2.9 mm.Contents• ESAB power source, designed for tube-to-tubejoining. The whole process can be controlled withthis programmable power source and the programscan be stored in the internal memory.• POC welding head fitted with PIB 20-30 internalbore welding torch.• PRB 17-49 and PRB 33-90 welding heads(covering tube dimensions between 17-49 and 3.90mm outer diameter).• MEI 21 wire feed unit.Advantages• Economy: the price for new pipes and the equipmentwas lower than for buying a new exchanger.• The synchronised pulsing makes it possible tocontrol the heat input and minimises the risk ofheat cracks. No more repair due to hot cracking.• Improved ergonomics/accessibility. The automatictube welding machines weld perfectly in confinedspaces. The customer can weld from the front.• Better ergonomics has resulted in increasedproductivity.• Increased weld quality. The same parameters areused to achieve same quality weld time after time.• No need for filler wire as the PIB internal borewelding tool is used. The same set-up to be usedafter the first weld for the balance of the welds.
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mechanised and orbital tig

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