Pipe fitting thickness

It should be the same thickness anyway, with some deviation depending on manufacturing process. The same thickness is usefull for welding. In butt weld it's easy to see why (full penetration between two plates welded top to top). In socket welding, the geometry is much like a fillet weld. In this case, an equal weld legs distance is desired because excess in one side is just waste material.

Hi Sachin, Normally you are going to meet different Thickness between pipe and fittings (Forge process) like reducctions, elbows, Tees ........ A good practice is to make a transition 3:1 and rebevel the fitting. For On lets and inlets you have to use Fillet weld and the fitting accirding to the specificate Rating (3000#, 6000#........)