huffdawg said:Can anyone tell me how much to allow for thread depth when measuring a pipe length.
Thanx Huff
huffdawg said:Can anyone tell me how much to allow for thread depth when measuring a pipe length.
Thanx Huff
heaterman said:huffdawg said:Can anyone tell me how much to allow for thread depth when measuring a pipe length.
Thanx Huff
What size pipe and what are you threading with?
ewdudley said:huffdawg said:Can anyone tell me how much to allow for thread depth when measuring a pipe length.
Thanx Huff
Google:
pipe thread engagement chart
I found that when they say maximum they mean awfully tight. Maximum minus about 3/32"/0.100"/2.5mm seemed to work for me for 1/2" through 2".
If you're doing really fine work Loctite 55 pipe sealing cord can give you that half turn of fudge factor you may need to have things come out perfectly.
Also, knowing nothing about the bucket of salvage pump flanges I was working with, there seemed to be some that were straight threads or something, which definitely need the pipe sealing cord to prevent excess engagement in past the inner face of the flange.
--ewd
huffdawg said:ewdudley said:huffdawg said:Can anyone tell me how much to allow for thread depth when measuring a pipe length.
Thanx Huff
Google:
pipe thread engagement chart
I found that when they say maximum they mean awfully tight. Maximum minus about 3/32"/0.100"/2.5mm seemed to work for me for 1/2" through 2".
If you're doing really fine work Loctite 55 pipe sealing cord can give you that half turn of fudge factor you may need to have things come out perfectly.
Also, knowing nothing about the bucket of salvage pump flanges I was working with, there seemed to be some that were straight threads or something, which definitely need the pipe sealing cord to prevent excess engagement in past the inner face of the flange.
--ewd
The straight threads might of been British Standard Pipe threads? I was reading in some other posts about using the cord and I looked all over town and nobody sells it here not even the plumbing wholesaler. So I have been using 1" teflon tape and the blue thread sealing compound.
Thanx
Huff
salecker said:Hi
When i started building my system,the owner of the plumbing store i'm getting my supplies from told me to use Hemp on all my pipe threads.He said if used properly it will not leak.
Proper prep is to take a sharp center punch and score the threads on the male fitting at a 90 degree from the threads.Score them as deep as yopu can by hand,this gives the hemp something to grab as you are threading them together.Wrap the hemp in the same direction as you would use tape.Wrap enough to cover the threads and use your hand to twist it into the threads.Then use a good quality pipe dope to cover the hemp.Tighten as ussual.
I was a bit sceptic at first.So i tried a comparison when i tested my tanks.
!st tank i installed all perment plugs with hemp and dope.Used teflon tape on the temp plugs and fill/gage.All the teflon joints leaked,really had to tighteen them hard to get them to slow down,one never sealled completely.
2nd tank,perment plugs hemp and dope,temperary plugs just dope,same thing the temp plugs needed more force to stop weeping,all plugs that had the hemp and dope on both tanks were leak free/
I had to retest the first tank,due to a bad weld.The last test i used hemp and dope on the temerary plugs and they were leak free.
so far i'm guessing i have close to 70 threaded joints in my system,have not had any leaks on any threaded joints,has been holding 65 PSI for over a week.
It takes a little extra time to do the prep,but well worth it for no leaks.
He did also say that if you did have a leak as soon as any liquid gets to the hemp it swells and seals the joint.Works for all liquids.He qurenteed if done to these conditions there would be no leaks
Now i'm a hemp user,have eveb stared using it on all my trucks and equipment when i takeapart a threaded fitting.
Hope someone gets some use from this
Thomas
huffdawg said:Im having toubles with the threader binding when I back it off the the threads , it then wrecks the threads I just cut. Any hints would be appreciated.
I only threaded till the last cutter was past the end of the pipe. I also watched the wholesaler thread the same pipe on a mechanical threader with no problems.in hot water said:huffdawg said:Im having toubles with the threader binding when I back it off the the threads , it then wrecks the threads I just cut. Any hints would be appreciated.
Could be you over-tightened it. Then the threads pull, or rip and gaul up inside the fitting. Or poor quality steel that tears when you thread it?
hr
huffdawg said:Im having toubles with the threader binding when I back it off the the threads , it then wrecks the threads I just cut. Any hints would be appreciated.
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