How can I get more info on open pipes show in /proc in Linux?

In Linux if you go digging in /proc/<pid>/fd often you'll see output like:

lrwx------ 1 root root 64 Jul 30 15:14 0 -> /dev/null
lrwx------ 1 root root 64 Jul 30 15:14 1 -> /dev/null
l-wx------ 1 root root 64 Jul 30 15:14 10 -> pipe:[90222668]
lr-x------ 1 root root 64 Jul 30 15:14 11 -> pipe:[90222669]
l-wx------ 1 root root 64 Jul 30 15:14 13 -> pipe:[90225058]
lr-x------ 1 root root 64 Jul 30 15:14 14 -> pipe:[90225059]

How do I get more info about the open pipes, such as which process is on the other end?

Similiar to other answers, but:

lsof | grep 90222668

Will show you both ends, because both ends share the 'pipe number'.

The only way to find what process is on the other end is by looping over all processes in /proc and seeing which are using that pipe (ie, which have symlinks in /proc/pid/fd to the same pipe ID)