The pipe's widest section has the most pressure while its thinnest section has the highest velocity.
Av = constant according to the continuity equation.
As a result, velocity is highest at the pipe's narrowest point and lowest at its broadest.
Bernoulli's theorem for a horizontal pipe states that
As a result, when a fluid flows through a horizontal pipe with a variable cross-sectional area, its velocity is highest and lowest at the narrowest point, and vice versa.