Excess pressure can be (2T/R) for

i. Excess pressure inside a spherical liquid drop = 2T/R, because there is only one free surface here

ii. In case of spherical meniscus of radius of curvature R, also excess pressure = 2T/R because again there is only one free surface.

iii. Excess pressure inside a cylindrical bubble of radius R in air  is given by ,$4\left(T\right)=2r\times △p\Rightarrow △p=\frac{2T}{r}$.    

iv. For a spherical bubble in water, excess pressure = 2T/R, as there is only one free surface.