How to cut ABS pipe


I need to cut off a toilet flange with a 4" ABS pipe in it, for a total wall thickness of 1/2". (1/4" pipe thickness, 1/4" flange thickness)
Can I use my 4" HF angle grinder with a 4" thin metal cutoff blade to go through 1/2" of ABS?
Any better solutions? Since the pipe is sticking out of the concrete slab only by 3/4", I cannot use my circular saw or my Sawsall.
Thanks.
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Walter
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Walter E. wrote:

Would a cable saw work? > http://tinyurl.com/3yzray6 I don't remember mine costing as much as these.
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I mark the pipe all around the circumference and use a hacksaw. Then I use fine sandpaper to smooth the edge so crap (pun intended) does not adhere to it.
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Is there some reason you can't use a hacksaw? That seems like the obvious choice from here....
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As others have said, used a hacksaw. Cable saws can work too but a hacksaw is likely to be easier.
Power tools don't work well on ABS (or PVC). They'll just melt and burn the plastic making a mess.
DO mark up the pipe, make a jig, or otherwise take lots of care to ensure a nice square cut. Unless you've done a lot of pipe work before, it's real easy to cut the thing way off square and it takes a lot of filing to straighten it up!
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Malcolm Hoar wrote:

I've used a chop saw many times for either with no difficulty.
For the OP, a standard woodsaw might work fine because you can flex the blade if you want a flush cut. Use thin cardboard or something to keep the blade off the concrete.
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Use a long blade on your sawzall and gently bend the blade.
cheers Bob
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I'd say that is the best way. Hacksaw is pretty much out cutting that close to a surface unless one wants some really beat up knuckles :)
Harry K
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A hacksaw blade with one end wrapped in cloth to hold on to works just fine for me. Blade lays flat, doesn't seem to scar the surface, works quickly on ABS , a trifle slower on PVC.
Joe
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Harry K wrote: ...

That's why they make the hacksaw frames w/ adjustable mounting angles for the blade...
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Good solution. If you have to do sort of thing repeatedly, get yourself an offset adapter <http://www.theflushcut.biz/ .
Cheers, Wayne
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Just as a thought, one of those saws on a rope? About 1/8" in diameter. One of the smaller ones. If you do it carefully, you should be able to get a pretty good cut. And if that sticks out, take a grinder to it, but I'd use a stringer brush, as it will take it off smoother. You might be able to use a 4" sanding wheel on the flat side, unless it loads up too much with melted plastic.
Steve
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done this and works great. The tool is about $40. WW
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Ridgid makes an inside tubing cutter, with a blade available for ABS specifically, but I'd be willing to bet you didnt want to spend that much. There are also drill mounted inside pipe saws made by PASCO (and also PlumBest) that work great on PVC or ABS, and they are very cheap.
BTW, you could also do that job with a hammer and chisel for free. What I do is just use a wasted blade and the Sawzall, because the blade is goping to be shot when you get done anyway. But that is the quickest method I have found.
HTH, Lefty
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