The tip does....
Ooooooooooooosh
Hmm, I'm surprised by that.
That looks dirty rather than perished, what difference was there to it being new?
Also what's the dark stuff at the end of the forge hose?
Standard pipes are likely to be EPDM or NBR, which is attacked by HC and oils.
Silicone hoses usualy have coatings that provide very high chemical resistance.