There is always a chance that any metal equipment or structure will need maintenance or repair after some time, especially in factories or industrial settings. Plant maintenance can include welding components back together, patching holes or cracks, and reinforcing weakened areas. Welders who specialize in plant maintenance may use a variety of welding techniques such as stick, MIG, TIG, and flux-cored arc welding, depending on the type of material and the specific repair needed. They may also use cutting and grinding tools to prepare surfaces for welding. Safety precautions are important in plant maintenance welding, as welders may need to work in confined spaces or near live electrical equipment.