nice for the first pair.
The next time you might want to try welding the tube on the inside of the flange and use silicon bronze on the outside of the flange and straps, Reason being the bronze welds at a lower temp and does not affect the tube as much which minimizes cracking at that point (almost like a gusset) of the weld. The heat affected zone from welding and numerous heat/run cycles make that area brittle
