Street Elbow ok in Hydraulic application?

[SPYDERLK]

Agree there is no way that fitting should be in that system. However, be careful throwing the "150 lb" and "300 lb" terms around. These are "pound" designations and not PSI. The actual code allowable pressure is temperature dependent. Most 150 lb threaded fittings are good for about 300 psi at room temperature. Piping and welded fittings may be good for a lot more. However, when you go up to high temperatures (say 800 degrees F) the 150 lb fitting might only be rated for 30 psi.

There is a big factor of safety there also. The fittings have to be able to take hydro testing of at least 1.5 times the code allowable and are good for a lot more before failure. So with room temperature conditions, 150 lb fittings are going to survive 500 psi with no problem, just don't depend on doing it constantly.

Yeah. Like I said earlier, I tested a Class 150 3/4 elbow to destruction. It popped at 7000 PSI. I now use it to remove pipe nipples. -- Loctite 638 let set up and then turn nipple out. Split the already broken elbow off and store for reuse.

 

[Rock knocker]

I can't speak for your state, but if you care to look it up in your copy Michigan's latest updates you could be sure if it's not there. (if you haven't seen something it doesn't exist?)

I confess that I'm neither Plumber or Pipefitter, just a lowly Toolmaker by trade, but am somewhat familiar with local codes and practices. Depending on job or classification a plumber in our area isn't automatically considered a pipe fitter and vice versa and IMO no one needs to be either to believe that a somewhat brittle metal can suffer from being repeatedly stretched by wedging it outward with considerable leverage.

We're all just 'some guy on the internet' unless we're on the job, and I apologize for not specifying the obvious reference to GI & BI fittings vs those for high-pressure hydraulics and made of entirely different materials. (I hope no one gets red-tagged for taking perhaps no more than my word for what seems like common sense, rule or no rule.)

Sorry, guys, if I too digressed from the inadvisability of using water or NG pipe fittings (cleared up?) on tractor hydraulics that I a$$umed was relevant to the thread.

btw, Knockrocker, my 'boss' (Master Plumber, Contractor) is ~half my age and recovering from a grand mal seizure last Monday. (His CPK # is finally down from >28k to <5k and he came home from the hospital today.) Why don't I have him run out and open the shop so that I can pore over the code/update books for your personal satisfaction? I'm sure he'd do it for some guy on the internet ...

Thanks for the novella of a reply. Coming from a family of UA pipe fitters, I just wanted to point out that what you wrote is complete hogwash. You are allowed to reuse pipefittings under most situations, hydraulic systems included.

 

[Tractor Seabee]

Thanks for the novella of a reply. Coming from a family of UA pipe fitters, I just wanted to point out that what you wrote is complete hogwash. You are allowed to reuse pipefittings under most situations, hydraulic systems included.

Hey Rock, another UA Fitter (retired) here; I wrote a previous thread here trying to clarify this stuff. I usually avoid talking code on this forum as most of our members don't deal in the trades but are just good mechanics. Manufacturers put PSI ratings on there stuff based on SAFE performance of their products. As one thread mentioned above about testing to failure of a low pressure fitting; in our trade we have seen a lot of stuff test way higher than operating pressure, but also fail not too far above its rating. Especially using malleable fittings is asking for failure.

In my experience we never reused malleable fittings as most were over tightened and stretched already, not worth taking a chance on as they are cheap anyway compared to labor to redo. CI and Steel, yeah we reused if we could get the CI apart W/O breaking.

I did fail in my previous thread to discuss using Schedule 80 nipples. Probably most do not realize that threading removes half the wall thickness. I once bought an old log splitter; every fitting was malleable and nipples were schedule 40. Guy put on a new valve and used all new fittings. It now has the proper ones.

Ron

 

[the old grind]

... I just wanted to point out that what you wrote is complete hogwash. You are allowed to reuse pipefittings under most situations, hydraulic systems included...

Everything I say is complete hogwash and 'most' everyone here knows it.

Sorry, but I don't think it's my fault when someone doesn't get that ...

:laughing::laughing::laughing:

 

[John_Mc]

Thanks, guys. I probably will replace what he did with the 1501 fittings BukitCase linked. The more compact I can make this, the easier it will be to stow when not in use. I have not worked much with hydraulics (as is probably obvious by now). What kind of "goop" should I put on the threads? Is it something I can likely pick up at a local hardware store, or do I need to order something?

I'm still thinking about what I can do to stow these when not in use. I could zip-tie them out of the way, but that would mean cutting the ties each time I wanted to use it - and finding my stash of zip-ties to replace it each time. Hopefully, I can come up with something reusable.

 

[Howling]

I'm still thinking about what I can do to stow these when not in use. I could zip-tie them out of the way, but that would mean cutting the ties each time I wanted to use it - and finding my stash of zip-ties to replace it each time. Hopefully, I can come up with something reusable.

Look Velcro straps.

On smaller stuff individual pieces with hole so can left attached.

Or bulk roll and cut to needed length.