Reusing brass pipes Terry Love Plumbing Advice & Remodel DIY

I have to repipe about 60' of an existing 1" water line to a new location and existing pipes are brass pipes. I was wandering if I should reuse those pipes or should I put in a new copper pipes. Also if I reuse them is there a way to clean the inside. The pipes are probably 80 year old. Thank

Top 12 plumbing tips + bonus. Essential reading!

Plumbing change in shower remodel Terry Love Plumbing Advice & Remodel DIY & Professional Forum

Copper or brass nipple for Delta adapter tub spout? Terry Love Plumbing Advice & Remodel DIY & Professional Forum

Top 12 plumbing tips + bonus. Essential reading!

Remodel framing and toilet flange updates Terry Love Plumbing Advice & Remodel DIY & Professional Forum

Shower head leaking when tub faucet is on Terry Love Plumbing Advice & Remodel DIY & Professional Forum

connecting a wall-hung toilet to waste riser, Page 2

Do I use pipe dope or other selant on this brass valve fitting?

Connecting 2 drain to 3 Toilet drain? Terry Love Plumbing Advice & Remodel DIY & Professional Forum

Copper vs. Brass PEX transition fittings Terry Love Plumbing Advice & Remodel DIY & Professional Forum