Tony M Nov 29, 2017:

@ Asker I have this nagging doubt that just maybe this doesn't mean 'pass' in the sense of 'passing a test' (= succeeding), but rather in the sense of 'passing the flame across the material' — that was how I instinctively read it, and i don't think it can be dismissed out of hand as a possible interpretation here.

Maybe the rest of your context will make it clearer — especially if there are any other mentions of 'pass'; failing that, it might be useful to look up this UL specification to see if that throws any light on the matter.