Points : Boiler Tube, Definition Definition Container tube and furnace tube fixing and repair are most important applications of orbital pipe welding. This form of application has turn into practical in recent years as of the availability of smaller, less expensive pipe welding power supplies, several with the facility to operate the full-function weld heads, which are capable of wire feed, torch oscillation, and automatic control of the arc break.
Some weld heads be able to be mounted among rows of tubing, which would be there not easy or not possible for a manual welder to right to use with his torch, or would need mirrors to view the weld joint. Inaccessibility be able to result in poor weld quality of manual welds and a high reject rate, which translates into time necessary for rework and a loss of efficiency.
A comparison between orbital and manual welding technology was provided by Carolina Power & Light Company. CP&L used both manual and orbital welding on its very good heater and reheater tubes at its Roxboro Electric Generating Plant. An outage be scheduled for 12 weeks to patch up 1,500 tubes, which was at first planned to be complete physically.
About four weeks into the outage, the contractor experienced a 16 percent refuse rate on the physical welds and a shortage of labor to complete the project on program. The plant contracted with one more company to weld the superheater header tubes mechanically. The reheater tubes be completed manually by the unusual contractor.
Equally jobs had to be 100 percent done through the outage. Because the superheater and reheater jobs were related in scope, it presented a chance for a realistic, on-site comparison of orbital and manual welding.
Additional power plants include productively used orbital pipe welding for boiler tube restore and alternate. In addition, these companies have effectively done orbital welds on the bimetallic welds among stainless steel and chrome-moly steel on the superheater headers, as well as welds at numerous extra location on the boilers.
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