how to make?

Question

I have to make a flat plate, maybe 2x4", with a couple of threaded holes in it. This much I know how to do with great certainty. I also need to have a pipe handle coming off the plate at a narrow angle, 25-30° and I'd like to be able to unscrew the pipe. What I was thinking of doing was cutting a pipe coupler at the right angle and welding it to the plate. However, all the pipe couplers I see appear to be cast iron. Further, none appear to be long enough. I'd like to find a 3/4" NPT coupler made of steel that is about 3" long. Now, I am capable of taking a piece of 1½" round steel and boring it out and tapping one end 3/4" NPTF but I'd really rather not, it's a lot of work and I don't know if I have a tap wrench big enough.

I looked at McMaster (handy reference) and they show no extra-long couplers.

Lots of ways to skin a cat, of course, I could just cut the pipe itself at an angle and weld it to the plate, but it would be nice to be able to remove it if I needed to.

Grant

Rick · Accepted Answer

couplers I seeWeld a pipe nipple to the plate and put the coupling on the end ofthat....

axolotl · Answer

. I'd like to find a 3/4" NPTPerhaps these folks. Gallimore

Rick · Answer

Or connect 2 rigid conduit nipples with a close nipple, weld, then cutto the angle. Your handle may not tighten up that well though...

Rick · Answer

threadedextra-longSorry, meant 2 conduit COUPLINGS : )

Steve Smith · Answer

Grant, all I know is that I recently threaded 1/2" NPT into steel. It was all I could do to finish the threads with a double handled wrench about 10" each way. You'll need a long wrench for 3/4".

Steve

Grant Erw> I have to make a flat plate, maybe 2x4", with a couple of threaded

RoyJ · Answer

pipe couplers come in both cast iron and steel. Cast looks like cast, steel looks like extra thick pipe. What any supplier will give you tends to be associated with whatever was cheapest last week.shows the cast couplers under the heading 'straight coupling', steel couplers under 'mechant couplings'and long couplings under 'API couplings'Part number 	46685K265 is 1-5/8" long black steel at $1.91Part number 43245K125 is API grade steel in 3/4" pipe size , 2-1/8" long, $6.58 each (wonder what makes them so expensive?)one comment of couplers: ASTM specs allow up to 2" (??)  couplers to be EITHER straight tapped or tapered, above that they are supposed to be tapered. I would suspect that the smaller cast couplers will be tapered, the steel ones will be straight through tapped. May not make any difference to you but...........Grant Erw

nic · Answer

Just tap a piece of 1" pipe. Schedule 160 that is. That makes it harder to find. Did this as a kid for farm implements because cast unions would fail.

Gary Brady · Answer

Pipe fittings are forged, are they not?  I know I've welded to fittings before.

Wayne Cook · Answer

Depends on where you get your fittings and what type you get. The rough outside fittings you find in the home improvement store are cast iron. The smooth outside couplings there are steel. In the high pressure business the fittings are forged steel.

Wayne Cook Shamrock, TX

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Harold and Susan Vordos · Answer

Pipe couplings are not cast iron. They're ductile iron, and it's not the same animal. They can be welded. Further, pipe couplings that come with pipe are generally steel, not iron, so one of them could be used for your project. If you can't find one for pipe, an electrical coupling is also made of steel, but is generally plated.

Harold

Harold and Susan Vordos · Answer

Grumble. :-( I think  I should have said that couplings are malleable iron.Harold

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