mechanised and orbital tig

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CASE STORY – contribution from Derek Harvey, ESAB UKManufacturing of body scannersMaterial: stainless steelDescriptionThe customer was manufacturing the scanners invarious sizes, using hand welding, but orders weregrowing and production had to be made faster.The welding on the end cap seam on the inside andoutside at both ends is critical as sensitive componentscould be damaged if too much heat was applied.One of the A25 heads is used for the root run and bothfor the following fill runs.The GMD system keep the head aligned during theweld cycle and the cameras allowed the operator tocontinuously monitor the weld and ensure that it wason line for the capping run.The vessels are mounted on roller bed set, and rotationof the workpiece and speed is set at the powersource and kept constant during the weld, thanks to thecontrol system.To prevent hold-ups waiting for a crane to turn thevessel to allow it to be welded at both ends, the rollerbeds are mounted on a turntable that will turn the jobthrough 180 degrees.Advantages• The installation has given an increase inproductivity and quality, and the customer hasordered more systems as a result.Contents• 2 pcs ESAB power source• 2 pcs A25 welding head with wire addition,AVC and weave• GMD guidance with 300 mm slides, modified togive X, Y and Z movement• CaB 300 to mount the heads• Special bracket arrangement to mount theequipment and give a third axis movement• ESAB (PEMA) 5 ton roller beds on a specialrotating base, driven by the power source and PAL3.• Colour camera and monitors to view the weld whenthe head is at the top of the vessel.
CASE STORY – contribution by Patrik Persson, ESAB SwedenNatural gas filling stations – Processkontroll AB, SwedenMaterial: stainless steelDescriptionThe use of natural gas is increasing. The environmentalaspect is becoming more and more an issue and LNG isnow used as source of energy in many areas, e.g. asfuel for cars and buses.Within EU it has been decided that year 2020 at least20% of all fuel for vehicles shall come from alternativeenergy sources, whereof 12% shall be natural gas.Today there are more than 50 natural gas filling stationsin Sweden, the goal is to have 100 stations by the end ofyear 2007. Germany currently has about 550 LNG fillingstations.Processkontroll AB, a Swedish company, has a longhistory of building LNG tank installations. They takeresponsibility for the entire project. They build thestation, which is their own design – and supply a turnkeypackage.The pipes are in stainless steel in dimensions from Ø16mm and upwards. The pressure in the pipes in an LNGfilling station can be up to 300 bars and the gas in thedispenser has a pressure of 230 bars.Contents• ESAB power source with cooling unit OCF 2M• ESAB welding head PRH 6-76, water-cooled, forwelding of tube diameters from 6 - 76 mm.Advantages• High precision and high security when welding thepipes together• Easy to use.• Quick service when needed.
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mechanised and orbital tig

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