You should probably service the flame trap. As mentioned, it is pretty easy. I threw out the flame trap screen on both my 850 and 240 years ago and never had any negative repercussions. In fact, I believe that Volvo got rid of the flame trap screen altogether because of its tendency to clog the system. Think this occurred when the S70/V70 models were introduced in 1998. I suggest just cleaning and or replacing any related hoses depending upon the particular hose's condition and tossing the screen.

Doesn't sound like you need to service the PVC system. Since the glove didn't inflate, then you are probably okay for awhile. These cars generally seem to need the PCV overhaul somewhere around 125-175k.