High pressure fuel line removal

Okay, I'm sure that I've seen it on here before in fact it was in one of Tim's posts somewhere but I cannot seem to find it again. I'm trying to remove the high pressure line from the fuel pump right after the gas tank. There's some I'm assuming flange type nuts that I couldn't get removed even though I unscrewed them then they just extremely tight and wooden budge any further. Like I said I'm sure there's a post somewhere but I can't seem to find it and I searched. So if anyone has any help please let me know. I have a bit of a fuel leak now because of it and I just want it taken care of. And so I'm a little more specific about it, it's the rubber hose immediately after the cap on the tank.