(Another) Compressor Piping Thread

[mkarlin]

what program is this that you used to mock this out?

Thank you all for the help so far!


Here is what I have for the layout so far:
Back Wall:

And inside the room with the regulator:

...

 

[welder4956]

So I have finally acquired all of the bits to build up my distribution system. But I am really struggling to cut the threads in the black iron pipe. Seems like no matter what I do, some of the threads shear off during cutting. Even if I go 1/2 a turn at a time and break the chips.

Anybody have some tutorials out there on manually cutting threads? The dies I have look good (pics later), and I am lubricating the cut (with ATF). Do I need specific Thread Cutting Lube?

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RapidTap works best for lube. On the threads shearing - are you trying to thread schedule 40 pipe? If so, you need to be using schedule 80. Schedule 40 is too thin to thread properly and is prone to failure if you do manage to thread it.

 

[MAYOR28]

what program is this that you used to mock this out?

That is AutoCAD.

 

[Firebrick43]

RapidTap works best for lube. On the threads shearing - are you trying to thread schedule 40 pipe? If so, you need to be using schedule 80. Schedule 40 is too thin to thread properly and is prone to failure if you do manage to thread it.

Huh?? I have been threading schedule 40 black pipe for 2 decades without issue to it thickness.

Issues with threads shearing in my experience is due to crappy Chinese or Turkish pipe. I have seen some so bad it was impossible to cleanly thread even with new dies, pull out a scrap of takeoff american pipe and it would thread cleanly with no issues.

We save all take off pipe now to make smaller sections and *******. Either way dark cutting oil does help, atf is way to thin and imagine no sulfur.

Also with the crappy chinese pipe/fittings we have to dope/tape/dope to get it to seal.

We finally got work to buy ward fittings but it is damn difficult to get american made pipe apparently now.

 

[bob15]

RapidTap works best for lube. On the threads shearing - are you trying to thread schedule 40 pipe? If so, you need to be using schedule 80. Schedule 40 is too thin to thread properly and is prone to failure if you do manage to thread it.

Funny, been threading Schd 40 pipe for years with no issues, not to mention using it for air lines for decades. When did it become too thin to use?

Hard part is find US or Canada made pipe.

Anvil and Ward are the 2 US made pipe fitting companies I use, with zero issues with either one. Just need to be careful as I believe Anvil has an import line.

 

[MAYOR28]

I am still in the process of installing the bulk of the air lines (just that one drop done so far). But I can say, that I have had zero leaks from any of the connections I have made so far. Even some of the 'torn' threads seated well and sealed up just fine.

I did get a automatic tank drain for the compressor recently. Which required me to rewire some of the compressor room to get an outlet in there. I also got a dust collector recently, which will live in the compressor room too. So I have been focusing on that install. Hope to get back on the air lines sometime soon.