shooting4life
Well-known member
- Joined
- Nov 19, 2012
- Messages
- 334
This was your mistake bud I am glad everything ended up working out.
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Home Depot cut & threaded iron pipe, but thread does not have taper
- Thread starter ws6formula
- Start date
This was your mistake bud I am glad everything ended up working out.
Sorry for bumping an old thread, but my issue seems to be the opposite. I had HD cut and thread some 1 1/2" oil fill pipe, and I unlike the factory fittings which thread in about 5/8" or so into the fittings, with the HD pipe I am able to almost burry the entire thread into the fitting. I tightened it as much as I could with pipe dope, but...
Should I take it back and have them adjust the machine and redo it? Or do I try it since I have everything setup and see if it leaks and go from there?
Should I take it back and have them adjust the machine and redo it? Or do I try it since I have everything setup and see if it leaks and go from there?
soapii
Well-known member
Sounds like HD needs to adjust the keys on their threading machine. Need to move them out a bit.
--Joe
Milton Shaw
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- Feb 11, 2011
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- 4,856
The last home depot pipe i bought and cut myself. The cuts and threads I did worked ok. The factory treads all leaked and had to be cut out and retreaded. They were cut too deep. Like several have said, use pipe dope and tighten them up and see if they leak. Most of this pipe is China **** from what I have heard here and elsewhere. Those cut threads do not show taper but if they were cut with conduit dies the fittings would screw on a long way not just a thread and a half. I suspect they were cut wrong with the adjustable threader on the Ridgid machine. Go back and get someone else to recut them and try each thread with a fitting while you are there.
It did get gradually more difficult and I don't believe it is bottomed out, it just wasn't what I was used to with all the other pipe I used that I got with the tank. Threaded it by hand a few turns, then cranked it with the wrenches and they are all about 5/8 inside the fittings.
I also noticed that the HD pipe is looser threading, as in if you start it a few threads, you can almost rattle the two pieces together (exaggerated of course). Maybe the taper is too steep hence the looseness at first, then the near bottoming out at the end?
LS6 Tommy
Well-known member
You've got a $7.00/hr guy threading pipe on a poorly setup and improperly maintained threading machine. What could possibly go wrong?
Tommy
Tommy
I know this is an old thread, and even older quoted post, but wanted to comment that it is not correct. The pitch is not the same between NPT and BSPT.
Particularly since they're getting less than the legal minimum wage it must be some shady under-the-table employment scam...
LS6 Tommy
Well-known member
Edited for accuracy. Since I've made more than that since I was 15 and I've never employed anybody with a skillset that could only command that much, I didn't know what the going rate was...
Tommy
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rlitman
Well-known member
I looked this up once, and recall that one size in particular had the same pitch (was it 3/8 or 1/2?). The difference was the thread angle and root shape, but I found it was possible to run an NPT tap into a BSP threaded part and get an NPT to work in it.
But yes, they do not all have the same pitch.
As for HD threading, yeah, their pipe and fittings have gone to **** since importing everything from China. I've had black pipe couplers threaded off angle between the two sides, but didn't notice this until I was trying to get things to fit together. That really screwed me once.
TX RamRod
Well-known member
Edited for accuracy. Since I've made more than that since I was 15 and I've never employed anybody with a skillset that could only command that much, I didn't know what the going rate was...
Tommy
When I worked in the plumbing department at Home Depot I made $9.00/hr, and that was 5 years ago. I enjoyed my time there (for the most part) and took the opportunity to learn a lot about plumbing as well as departments through out the rest of the store. Unfortunately there are a lot of people working in those stores that just don't care about what they do.
It was just a college job for me, but I still use a lot of the knowledge that I gained there. And I can still tell you where nearly anything in that store is, for some reason I can't block that useless information out.
TX RamRod
Well-known member
^ ^ ^ What about USEFUL information . .. like hiding places for Penny items ??
Well after I found them they usually went into a drawer of the ugliest, most outdated vanity I could find (one that no customer would ever desire to look at) until I could get someone come purchase them haha.
As far as where to find them? Just luck of the draw really. The ones I usually found were way back behind something that never moved and hadn't seen the light of day in some time.
gmwelder86
Well-known member
Here is how you check for proper thread make up. IE are the threads deep enough. By had with nothing on the threads no tape or dope. Thread the fitting into the pipe by had as far as you can, mainly snug no need to really wrench on it. Now removing the fitting and count how many rotations you get. Looking for 2.75-3.5 is ideal. I am for 3. If you get more threads are to deep. Need new prices cut. Less the threads can get recut a bit deeper. This is how I've done thousands of feet of threaded pipe. And the way we are taught as apprentices since they seem to be stuck on the threader the most on big jobs.
Thanks for the info. In my searching this is what I read as well. I will try for the fun of it tonight with a piece and see what I come up with.
Sent from my iPhone using Tapatalk.
sberry
Banned
One the benefits of small pipe like 1/2 is you can get them tight. Don't be scared.
My issue is with 1 1/2" pipe.
sberry
Banned
Ok, how big of wrenches do you have on it and did you have a manly breakfast?
sberry
Banned
Already starting out with wrenches a size, maybe 2 too small. No wonder so many joints leak.
If it's a Ridgid 1224 machine, you can cut either NPT or NPSM (straight) threads using the same die set depending how you set up the machine. See page 11 of the manual for the machine:
https://www.ridgid.com/us/en/1224-threading-machine
https://www.ridgid.com/us/en/1224-threading-machine
rlitman
Well-known member
Spot on observation. I've got pipe wrenches up to 24". The 24" makes it so a child could tighten 3/4" pipe, and 1" is easy enough. But by 1 1/4", you'd better have had your wheaties. I couldn't imagine trying to tighten 1 1/2" pipe with an 18" wrench. I struggle with my 24" (though it works well enough if I can find solid things to brace and lever against).
My 18" wrench gets used on 1/2" pipe, or sometimes 3/4" if I'm in a tight space.
MacMcMacmac
Well-known member
Try tightening 4" pipe with a 48" steel pipe wrench. You'll be expanding your vocabulary.
The thread on the HD threaded pie is too short. I wouldn't bother trying to mate two pipes that clearly haven't been fabricated properly. The seal is created by the threads AND the dope/tape.
The thread on the HD threaded pie is too short. I wouldn't bother trying to mate two pipes that clearly haven't been fabricated properly. The seal is created by the threads AND the dope/tape.
Jess
Well-known member
I had some pipe threaded at Home Depot, and the guy running the machine was not sure what he was doing and buggered one. As it wasn't right, we cut it off and did another ok. A few weeks later, I went back for another piece and the machine was gone, and they disappeared from all the stores anywhere near I can travel to. Probably due to the issues with the machines and not enough employees who had any idea how to safely and properly run them. Now, I use pro plumbing company and they are great to deal with. Their shop guy will do pipe on a phone call and they are ready by the time I drive down there.
TractorJeff
Well-known member
They can run the threader over that, you shouldn't need to replace the pipe. Convincing the Returns desk manager that it is wrong will be next to impossible. IMOOC
12 inch wrench is plenty on 1/2"(sorry Berry), an 18 inch will run up 2" plenty tight enough. I unscrewed thousands of feet of oil field pipe with 24's that were so freaking tight from an 18". I've also seen couplings split from pipe turned in too tight.
12 inch wrench is plenty on 1/2"(sorry Berry), an 18 inch will run up 2" plenty tight enough. I unscrewed thousands of feet of oil field pipe with 24's that were so freaking tight from an 18". I've also seen couplings split from pipe turned in too tight.
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