Boiler Fabrication Continued

This posting shows what took place to generate the firebox. I tack welded the front and rear pieces of the firebox to a piece of channel at the appropiate distance apart. The channel was clamped very firmly to the welding table. The mid point was found on the crown sheet and tack welded in place as the picture shows. A lot of heat was applied to the crown sheet to wrap it around the outside of the front and rear pieces of the firebox. Bar clamps were used to aid in the wrapping process as well as holding the sheet in place for tack welding. There is a picture showing the bottom of the fire box and how the mud ring had to be ground to provide for a root weld and then the fillet welds. The welding process for this project entailed a root weld, fillet welds that required anywhere from 4 to 6 passes depending on the width of the weld area and then a cover weld. It was a very time consuming process, but a great challenge and the out come was most gratifying.