If using the option of turning the soft metal flashing down into the pipe, the possibility exists that the metal may split due to pipe expansion and contraction and/or building/roof deck settlement.
The profile of specific components, their configuration or sequencing, can vary with the roof system, climatic differences, and regional or area practices.
In cold climates, where snow and ice are common, an ice-dam protection membrane is recommended on downslope roof perimeters (e.g. eaves), valleys, and around penetrations.
