Full crimp or Ear Clamp

[Jaeger_S2k]

Thinking
Are Single Ear Crimps as good as full crimp for
Compressed Air?
Gas (oxygen, argon, propane etc)?
Water?
I have ear crimp pliers but not full crimping setup.

Ear Clamps =

Full Crimp =

 

[cheb]

I'd go for full crimp, I dislike snagging hoses. Ear clips aren't as bad as a worm drive clamp but they still snag.

 

[Morrisman]

Use Pushlok hose if you can, no crimps needed.

Not sure how spendy it is, but we used it for all airlines offshore.

https://www.parker.com/content/dam/Parker-com/Literature/Polymer-Hose-Division-Europe/Sales-and-Marketing-Bulletins/4400_Rubber-Hydraulic/Push-Lok-Hose_Fittings_BUL_4480-B176_UK_2016-11.pdf

 

[bricol]

Used with the right hose tail with appropriate hose, they are fine - just as likely to snag on stuff as the fitting they are used on, so in reality, not much of a problem, or so I've found.

 

[Memmeddu]

Thinking
Are Single Ear Crimps as good as full crimp for
Compressed Air?
Gas (oxygen, argon, propane etc)?
Water?
I have ear crimp pliers but not full crimping setup.

Ear Clamps = View attachment 490777

Full Crimp = View attachment 490776

No
But they are good enough
The hose will crack near the clamp or the crimp anyways.
Stick with ear clamps even if they are kinda bulky and keep catching everywhere.
For air hoses I suggest you to get some reusable fitting .
They have a barbed fitting on a nipple and a screw on sleeve.
They give a similar result to full crimp but reusable

 

[Blue Chips]

Full crimp would be my choice for exerting even clamping pressure over the largest area (clamping tightly against all of the barbs of a fitting). And as mentioned, they don't snag things.

However, if I don't have the appropriate fitting for a full crimp, I like using 'Oetiker'-style clamps, but with an extra insert to bridge the 'ear' gap and exert even pressure all around.

Here's a hose I recently made up:

They don't stick out as far as worm-drive clamps, and I think they look neater. If they get a little loose over time, you can just give them an extra squeeze with the pinch tool. The downsides are that they don't have a wide clamping range, so you need to stock a lot of different sizes, and they're one-time use, since they have to be clipped off to remove them.

 

[Erie Fred]

As with any clamp ^^^ if you slip a piece of heat shrink tubing on the tube first,
slide it up over the clamps after crimping, will "soften" any sharp edges that catch
on things.

 

[Jaeger_S2k]

Oetiker 167

I remembered you saying this before, I've just checked and that's the ones I ordered and have had delivered, see I do listen (unless it's about magnetic pickup tool ).
Need to check my shrink tube now for the right diameter, dam we're going to be looking 'right posh' here!

 

[DAPPH]

I use double ear crimps on all tubes & hoses under 22mm , any that needed covering got a few wraps of self amalgamating tape wrapped over them as protection sleeving . Better than heat shrink as it lasted years not months .

 

[Erie Fred]

I remembered you saying this before, I've just checked and that's the ones I ordered and have had delivered, see I do listen (unless it's about magnetic pickup tool ).
Need to check my shrink tube now for the right diameter, dam we're going to be looking 'right posh' here!

Carefull now......what color of shrink tubing ?
....

 

[Jaeger_S2k]

I use double ear crimps on all tubes & hoses under 22mm , any that needed covering got a few wraps of self amalgamating tape wrapped over them as protection sleeving . Better than heat shrink as it lasted years not months .

“Self amalgamating tape” the easily forgotten hero.
Used to use it extensively on ariel fittings, they rarely leaked. Must find it, it's here somewhere.

 

[chrismac]

“Self amalgamating tape” the easily forgotten hero.
Used to use it extensively on ariel fittings, they rarely leaked. Must find it, it's here somewhere.

What was the purpose I wonder amalgamating tape was developed for, someone somewhere must have had the need.

 

[cheb]

Carefull now......what color of shrink tubing ?
....

That would depend on what fluid was being piped.

 

[Blue Chips]

What was the purpose I wonder amalgamating tape was developed for, someone somewhere must have had the need.

Self-amalgamating tape (or self-fusing or self-bonding tape) can be used for weather-resistant insulation on certain types of electrical splices, as well as other purposes. It's available in lots of different varieties.
Here's a LINK to one type of self-fusing tape. Scroll down on that page to see some other variations.

 

[Jaeger_S2k]

What was the purpose I wonder amalgamating tape was developed for, someone somewhere must have had the need.

Designed for the Military (via University) as an alternative/better option to electrical tape. Wikipedia has a bit on it.

 

[Erie Fred]

That would depend on what fluid was being piped.

That's a really good idea.
I like it.

 

[cheb]

I'd suggest trying to follow the colo(u)r codes on gas bottles, air being black and white quadrants. Maybe black and white stripes on the gas line.

 

[hotponyshoes]

I'd suggest trying to follow the colo(u)r codes on gas bottles, air being black and white quadrants. Maybe black and white stripes on the gas line.

Probably better off creating your own colour code system, black & white could be air, oxygen (several types), co2, etc
All of which you might have in a home workshop.

Or just buy one light colour and use a marker pen.
Or write/print on a bit of label paper, stick it on and cover with clear heat shrink.

I just use different types of quick connector.
Rectus 17 for compressed air that's come out of the dryer/filter.
Pcl for compressed air that's come out of the oiler. Tools are then fitted with the suitable fitting, means you can't run an air drill without any lubricant and you can't blow oil into your car tyres or inadvertently use a airline that's had oil in it for paint spraying or the plasma cutter.
Not an ideal system as sometimes you might want to drill something like a bit of plastic without getting oil contaminates. A short length of convertor hose was my workaround but I'm mostly using cordless tools now anyway..

I've then got Rectus 21 on all the welding kit.
Again, not ideal as you could potentially connect co2 into the tig or a purge gas line into a water cooler. My system has also got a bit muddled due to some of my bottles being rent free and those coming with a en quick connector that's not changeable so I've still ended up with 2 types of hose..
The en connectors are only available in limited styles so I can't change everything to that.

For safety reasons the ones to concentrate on the most would be fuel & oxy lines for cutting gear. You'd really want to be sure nobody could connect a line that had been used with a tool oiler to a oxygen cylinder for example.
The fact that the hoses are red and blue and the fact that I'm not a complete muppet have kept me alive so far without any additional measures.

Also, if you don't have a decent storage system, different colour hoses are far easier to untangle than different colour ends. It's easier to work out a black, yellow and orange hose that have been chucked in a box than 2 black ones.

 

[hotponyshoes]

On the original question,

Full crimps are far nicer, but they are hard work to do nicely.
Everything needs to be perfect, fitting stem size, hose wall thickness, ferrule size, and the crimp size die.

I've never seen an off-the-shelf kit.
You'll need to do a bit of trial and error to get correctly formed crimps.
Then, you'll buy another pack of 6mm hose tails and find the stem is 0.4mm bigger and everything needs adjustment again.
If I was setting up a full workshop again from scratch I'd buy 100m of hose and 50 fittings and crimp everything. But (even though I have the kit) 99% of mu own stuff now is done with ear clips.
They are easy to use, even without the proper tool you'll get it 90% perfect and that's better than a 50% perfect full crimp.
As mentioned earlier, the single ear full band type are good.
Don't pinch the hose and are easier to remove without damaging the hose if needed.
Often sold as 'full band' or 'stepless' clamps


They do snag on stuff, I've never really had an issue with them on the end of hoses in use but some sort of covering would make it easier to untangle and pull out of a box.
Extension lines are the worst when you are trying to drag the joining connectors over a table edge or across all the crap in the floor.
Have a look at the water-fed pole boys. They are using 3d printed cone shape covers around the quick release fittings. Mainly to stop them disconnecting themselves when pulled over something.
It would be easy enough to print a sleeve to cover the ear clip. Either slip it on before crimping or print in 2 halves so it clips on afterwards.
You might need to invest in the proper pliers to make all the ears the same or just allow plenty of room for them in the print.

Or, use a strain relief boot, you can get these for hoses or cables in a variety of colours (mostly black). If you could find the perfect size you could wrap tape over the ear clamp until its built up enough, chop off the lump of tape that's risen up over the ear, pull the boot up.


Or just get some bigger silicone or rubber hose, warm it in hot water if required, force it over the ear clamp. It will still have a lump in it but at least it will be a smooth lump.
You'll be able to fit/remove from the connector end so easy to replace when needed.