I understand people wanting to be sure things are properly sterilized, but heres an exerpt from the fda guidlines for liquid pasteurization:
160 degrees F for at least 6 seconds
165 degrees F for at least 2.8 seconds,
170 degrees F for at least 1.3 seconds,
175 degrees F for at least 0.6 seconds, or
180 degrees F for at least 0.3 seconds
Now, this is the liquid temp...if you have a reasonably clean chiller and lines, getting your equipment to this temp for even a few minutes should be more than enough to kill any bugs. I personally re-rinse my plate chiller and hook my lines up. I fill it will boiling wort and let it hang for the last few minutes of the boil(i only run the pump enough to fill the lines and chiller, then shut off). At flame out, i pump the hot wort through everything for a few minutes prior to starting the cooling water flow. Never once had a problem doing this as long as you keep your chiller clean (backflush, bake when necessary).