Street Elbow ok in Hydraulic application?

[aczlan]

Thanks, Ron, and everyone. I've been poking around some more, now that I know the search terms to use. I can find some rated at 300 PSI, and thought I saw one at 500, but can't find it again, so maybe I was looking at something else. A service guy is stopping by Tuesday afternoon to make repairs. I just sent a message to the Service Department person who set up the appointment with a picture of the parts in question and asked her to make sure he brings appropriately rated hydraulic fittings with him.
A more in-depth discussion will take place when I am at the dealership in person.
BTW - what are the chances that screwing the quick disconnects and other fittings on to these malleable iron parts has damaged the threads?

The link I posted with the picture has the right ones that are rated for tractor hydraulic system pressures. See also Brennan 552-24-24-FG Forged Steel Pipe Fitting, 9 Degree Street Elbow, 1-1/2-11-1/2 NPTF Male x 1-1/2-11-1/2 NPTF Female: Industrial Pipe Fitting: Amazon.com: Industrial & Scientific for another one.

Aaron Z

 

[Egon]

Fittings come in many different sises, materials and ratings. You've just got to shop at industrial stores to find what you need. Pressure fittings have to meet standards. Their cost may make sitting down advisable when hearing it. That is why the box stores usually do not carry them.

The fitting pictured by the OP may have been in a return line service and deemed adaquate by the shop as it should not see higher pressure. As to its use in a hydraulic circuit I do not know??? They should never be used for a pressure line.

[video]http://www.fittings.com.tw/e-catalog/forged-pipe-fittings.pdf[/video]

page eight has a street elbow.

 

[the old grind]

Current plumbing codes specify that female pipe fittings not be re-used due to potential stress fractures from repeated tightening. Hydro pressure vs typical gas/water pressure is scary when you consider that.

I got ORFS adapters for the new outlets & some JICs from Parker but all the rest here from TSC when I hung the big Allied FEL on the JD. (Five 'streets' altogether, 1/2" NPT)

 

[John_Mc]

The picture below is what they replaced the original street elbow with when I complained about the leak and the low pressure rating. Still not like the pictures posted earlier. Does this look like the right fitting for this application? (apparently, they did not have the male-female fitting, so used a double male adapter).



Now I just need to figure a way to stash this end of the hose out of the way when not in use.

 

[Rock knocker]

Current plumbing codes specify that female pipe fittings not be re-used due to potential stress fractures from repeated tightening

Got a code reference for that? I can't find any.

 

[LD1]

Rule of thumb is if there is no rating stamped/cast into it, treat it as 150psi fitting.

Schedule 80 pipe fittings (300psi) are marked with a pressure rating.

A105 forged fittings which look similar to black pipe, are always marked as such.

But You need steel fittings made for hydraulics as other said. And I too would not trust that shop

 

[SPYDERLK]

The picture below is what they replaced the original street elbow with when I complained about the leak and the low pressure rating. Still not like the pictures posted earlier. Does this look like the right fitting for this application? (apparently, they did not have the male-female fitting, so used a double male adapter).

View attachment 465753

Now I just need to figure a way to stash this end of the hose out of the way when not in use.

Yes those are fine, just not quite as "clean".

 

[BukitCase]

Agree with finding a different shop - and if the newest "cobble job" gets too cumbersome for you, here's some options (assuming you stay with NPTF hoses and QD's)

Female Pipe Swivel Fittings (NPSM) > Discount Hydraulic Hose.com

I would have used either a 1501 or 1501L in your case, depending on which length worked better... Steve

 

[KennyG]

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.

 

[the old grind]

Got a code reference for that? I can't find any.

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 ...