Which type of tips are useful for cutting risers and flanges due to their design?

The design of riser cutting tips makes them particularly effective for cutting intricate shapes like risers and flanges. These tips are specifically engineered to create a narrow flame that can access tight spaces and make precise cuts, which is essential when dealing with the geometry associated with risers and flanges. Their shape and orientation allow for better control and penetration of the flame into the material being cut, minimizing heat distortion and ensuring cleaner cut edges.

In contrast, the other types of tips may not possess the same level of specialization required for these tasks. For instance, metal washing tips are more suited for cleaning surfaces rather than cutting. Rivet blowing tips are designed for removing rivets and may not have the necessary shape and cutting capability for flanges and risers. Sheet metal cutting tips are generally broader and aimed at cutting flat sheets, thus lacking the precision required for more complex forms. Therefore, riser cutting tips stand out as the best option for this specific cutting application.