Device and method for removing elastomeric polymer liner material from inside a pipe

A method of facilitating removal of elastomeric polymer liner material lining an inner surface of a pipe, the method comprising:

• orienting a knife in a working orientation with respect to the pipe, the knife having an axial blade portion and a radial blade portion joined at a heel with respective cutting edges of the axial and radial blade portions facing in the same direction, wherein the axial and radial blade portions are oriented axially and radially, respectively, relative to the pipe, with the axial blade portion being further from an axis of the pipe than the radial blade portion;
• and
• rotating the knife about the axis of the pipe in the working orientation with the cutting edges leading and with the knife in contact with the elastomeric polymer liner material to cause the cutting edge of the axial blade portion to cut through the elastomeric polymer liner material along an annular trajectory and to simultaneously cause the cutting edge of the radial blade portion to cut through the elastomeric polymer liner material in a radial dimension of the pipe.