Originally Posted by
gaobest
Is it possible to go to the Amex Centurion lounge (located in T3) after the VX security in T2 at sfo? About how far of a walk is it (5-10 mins?)?
The way you have worded this question, the answer is no. Once you go through TSA at T2, there is no access to T3.
You would have to go to T3, use TSA there and then access the lounge. When you're done with your visit, to go back to T2, you'd re-clear security to access the VX gates.
The walking distance from T2 to T3 is about 5 minutes for an average walker using the outside sidewalk.