Welding is a process of joining similar metals by application of heat, with or without application of pressure and addition of filler material.
Advantages
Welding gives a strong joint
Leak proof joint
No need of any preparing process like drilling and thread cutting
Welding allows joining of various shapes including plates, rods and sheets
Limitations
Skilled labours and electricity is required
No provision for modification and correction without damaging the part
There is chances distortion, stress and crack in the welded members
Inspection of welding is more difficult and costlier than other joining methods
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