Clamped on shoes or clamped on anything have some distinct advantages and disadvantages…

Advantages:
No or minimal welding… as you start working on alloyed pipes this can be a major consideration. Frankly welding anything on P91 to me is a daunting task.

Ease of assembly… easy to field jiggle for fit up..

Disadvantages:
Expensive…. Clamp-Ons are more expensive than a simple welded WT shoe and or saddles.
Availability…. Plate material is more readily available than pre-manufactured items.

Load Ratings…. The data for what load the clamp on can or can’t take may be hard to come by.


The bottom line for me is on anything but carbon steel I like em!