Teflon Tape

(quoted from post at 22:35:05 05/23/13) How many wraps of Teflon tape should be put on 1/2 inch pipe for sealing ?
Thank you for your help.

If the threads are good, 2 wraps is enough. Built test machines in a hydraulics test lab for 25 years and the only time we used more than 2 wraps was on rough threads or big pipe, like a 2 1/2 or 3" supply line.
BTW, be sure to wrap in the right direction so it doesn't rry to unwind when you screw it in.
 
(quoted from post at 20:49:43 05/23/13)
(quoted from post at 22:35:05 05/23/13) How many wraps of Teflon tape should be put on 1/2 inch pipe for sealing ?
Thank you for your help.

If the threads are good, 2 wraps is enough. Built test machines in a hydraulics test lab for 25 years and the only time we used more than 2 wraps was on rough threads or big pipe, like a 2 1/2 or 3" supply line.
BTW, be sure to wrap in the right direction so it doesn't rry to unwind when you screw it in.

Tape on hyd!?! Things sure were different way back then.
 
Sure, why not?

If you wrap the tape starting 1-2 threads back from the end, it does its job of sealing and there is no way any bits of tape can get into the system.

The only reason teflon tape has a bad rap is because of the hacks that can't wrap a fitting without hanging a bunch of excess tape off the edge of the threads.
 
(quoted from post at 05:05:29 05/24/13) Sure, why not?

If you wrap the tape starting 1-2 threads back from the end, it does its job of sealing and there is no way any bits of tape can get into the system.

The only reason teflon tape has a bad rap is because of the hacks that can't wrap a fitting without hanging a bunch of excess tape off the edge of the threads.

I know, hydraulics professionals (at what I was taught at the tech school) say it should never be in a hyd shop. He said pipe dope was a much safer method for hyd systems.
 
I agree with mkirsch, but be sure to keep it away from the last 1 or 2 threads. Also if you remove the fitting be sure you remove ALL the old tape from both pieces before re installing. Just a tiny piece can get caught in valve or pump.
 
I don't use tape as a rule. It is a lubricant,and if there is a load on the pipe trying to unscrew the pipe, it is far easier to unscrew, than when using a teflon-based dope.

If you have to use the tape, 2 wraps is enough, keeping the first couple threads clean, and make sure to wrap in the direction so the tape will get tighter, not loosen & bunch up.

Pete
 
(quoted from post at 07:05:29 05/24/13) Sure, why not?

If you wrap the tape starting 1-2 threads back from the end, it does its job of sealing and there is no way any bits of tape can get into the system.

The only reason teflon tape has a bad rap is because of the hacks that can't wrap a fitting without hanging a bunch of excess tape off the edge of the threads.

Exactly right! Only way it can get in a system is [u:486a8c5db9]if it's used improperly[/u:486a8c5db9]. When re-doing a fitting, always clean all the old tape off the fittings and leave at least one thread back from the end and how can it get in the system?
 
:D "...way back then."... Yeah, guess it's been a while... Eaton bought Cessna in July '89 and I was the last person to leave the lab on Nov. 1, '90 when engineering finished moving to Eden Prairie. Didn't do much hydraulic plumbing after that as I worked mainly on electrical/electronics/CNC.
 
teflon tape is not a sealant it is a lubricant. it balls up inside the fitting and will break fittings if you aren"t careful. the only thing that you should use tape for is a fresh water line so you don"t get the taste of the pipe dope in your water. you guys really need to go to a lock-tite seminar.
 
:D "...way back then."... Yeah, guess it's been a while... Eaton bought Cessna in July '89 and I was the last person to leave the lab on Nov. 1, '90 when engineering finished moving to Eden Prairie. Didn't do much hydraulic plumbing after that as I worked mainly on electrical/electronics/CNC.

I'm sorry. I had to do it. :lol:

We watched the Vickers training videos that had to be from the 70s. The guy was in a blue lab/shop coat (just like my HS shop teacher wore) His name was Paul something... They were very good videos.

I bet you wouldn't be using as much tape if you worked in an industrial setting. Put a tiny piece of tape in a valve for your CNC and see what kind of parts it makes.
 

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