Survivability for an arms warrior is near non existent, besides heroic leap as mentioned above, you're only true form of dodging heat would be to stack speed pots.
I play a fury warrior at 29 and I feel like I have way more survivibility than Arms does by miles.
They basically get a near constant heal with Bloodthirst every 4secs.
Granted it's only 4%, but that's a 4% heal every 4secs. I feel like I eat through people faster than Arms does, however Arms does have higher critical hits.
That 4% may seem small, but when going 1v2 it can determine your fate.
Not to mention Enraged Regeneration, a 2min cool down that increases health gained from the Bloodthirst heal by +20% and reduces damage taken by 30% every 2mins.
It's clear Fury takes the win for surviving and lasting longer, but if you have a pocket healer Arms can def train wreck.