Copper Pipe

Copper Pipe

How do you remove a kitchen sink drain hole copper pipe?

The copper pipe where the water runs immediately after the drain hole for a kitchen sink faucet is cracked and needs to be replaced. How do you get this tube to come off?
Is there a washer thats needs to be unscrewed for the copper drainage pipe to come off? Can anything else besides channel lock pliers be used to take this off? Can this simply be replaced by buying another copper drainage pipe at the hardware store?

If you are talking about the 1-1/2'' tube directly under your basket strainer[which is the part that sits in the bottom of the sink bowl] you may be talking about what is called a ''brass tailpiece''.
You call it copper, but is it a gold , brassy colour? If it is then it just threads onto the bottom of the basket strainer I mentioned earlier and can be removed with channellock pliers.
If it is actually copper, then it may be hooked up solid. Which means that it was threaded onto the basket strainer, and then the joints were soldered making it impossible to remove without actually cutting the copper.
One other possibility is that it's a brass tailpiece that was threaded on and then slipped inside the copper pipe and soldered, as the 1-1/2 brass tailpiece has an outside diameter that fits inside the 1-1/2 copper pipes inside diameter. If this is the case it would have to be cut or ''sweated'' out using an acetylene torch, heating the joint until the solder melts and the tube can be twisted out while the solder is a liquid again.
I'm sorry for being long winded, but there are several possibilities as to what you actually have there.
I hope I've been of some help anyway.
Finally, if this is a brass tailpiece as I would suspect it is, then replacements are readily available at any hardware, good luck!