An anchoring assembly for anchoring a liner of a cured lining material arranged to be applied in liquid form to a metal object provided with the anchoring assembly, the anchoring assembly including an elongated mounting pin and a ferrule provided at a first end thereof, wherein the pin is arranged to be mounted at the first end to the metal object, the anchoring assembly further including a plurality of spaced anchor fins connected to the pin at a second end and extending radially outward relative to the pin, wherein the ferrule includes a radially outwardly extending place holder part arranged to be held by a ferrule holder during mounting of the pin at the first end to the metal object.

A weld stud for drawn-arc stud welding has a functional portion and a welding portion which represents one end of the weld stud and which is delimited by a front face that is curved outwards in a longitudinal direction of the weld stud.

A portable drawn arc stud welder apparatus with a lithium ferrophosphate (LFP) battery and stud weld battery control system (SWBCS) is provided for welding a stud onto a workpiece. The portable drawn arc stud welder apparatus includes a housing, an LFP battery disposed in the housing and including a plurality of LFP battery cells, a weld stud gun configured to hold a stud and is electrically connected to the LFP battery for receiving energy from the LFP battery to pass a current through the stud and the workpiece to form a weldment. The SWBCS is disposed in the housing and electrically connected to the LFP battery of the portable drawn arc stud welder apparatus. The SWBCS includes a computer, a memory, and instructions therein to implement control and monitoring of the operation of the portable drawn arc stud welder apparatus.

A weld stud for drawn-arc stud welding has a functional portion and a welding portion which represents one end of the weld stud and which is delimited by a front face that is curved outwards in a longitudinal direction of the weld stud.