Fuel hose that is bulletproof

BarryL · Posted: Wed Jul 24, 2013 8:39 am Post subject: Fuel hose that is bulletproof

In my work I came across this 5mm hose.

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Cross section is a bit larger diameter (about 12mm) than stock braided and won't bend real tight (3-4" radius).

It can be used without clamps, with clamps, or with special fittings of your choice. Here it's on a gas tank outlet.

It could use some glycerin type gel to help it slide on to longer pipes but it will weasel on an inch no problem dry. Getting it off dry is nigh to impossible. It would probably last indefinitely and may even be slightly fire resistant.

CoastalAirCooledVW · Posted: Wed Jul 24, 2013 9:29 am Post subject:

Interesting, does your work have any experience with how it has held up? Do you have a link for it? I found the Parker website but couldnt find this specific hose. It seems like pretty sturdy stuff.
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1966 Velvet Green Standard

Cuñado Wear · Posted: Wed Jul 24, 2013 9:32 am Post subject:

yes more info please.
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CoastalAirCooledVW · Posted: Wed Jul 24, 2013 9:36 am Post subject:

Just found a link for it

http://www.mrostop.com/225-4-parker-3-16-transport...QgodmD4A6A

The reason it is so hard to get on is because it is 3/16 which is 4.76mm and the original was 5.5mm (I think).

Interesting that it is steel braided, too bad it isnt in metric sizes
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1966 Velvet Green Standard

BarryL · Posted: Wed Jul 24, 2013 3:51 pm Post subject:

Here's the link to the specs. It's the top row. Looks to be 13mm OD.

http://www.hoseandfittingsetc.com/product/hose/225-hose/

Says and measures 5mm.

OG may have been 5.5, I'm not sure. The pipe is 6mm it seems. Most websites and catalogs I've seen list the braided VW engine hose as 5mm.

I've used other Parker hoses but not the 225. A fuel manifold array I built for a yacht in the late 80s still has the same hoses just as fine as the day they went in. That fuel is diesel, however.

busdaddy · Posted: Wed Jul 24, 2013 6:27 pm Post subject:

I find it a little odd that they do not list any real technical specifications for the product even on the manufacturers website, sure they say "synthetic rubber" but that could be alot of things and alcohol isn't mentioned anywhere. Sadly in the 21'st century there's not many things that can resist that corn juice gas is cut with now and rubber (even synthetic) isn't one of them. It may be tough hose and work well in hostile high vibration environments carrying diesel but unless it's lined with a floroelastomer barrier it's not coming near my bus, even some J30R9 rated fuel injection hose (unlined) is showing stiffening and checking after 6-8 months and it was alcohol rated according to the seller Confused

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flemcadiddlehopper · Posted: Wed Jul 24, 2013 7:35 pm Post subject:

It also does not specifically list gas in the list of uses..???? Fuel line is fuel line, it usually does not cross over with hydraulic fluids.

Gordo.
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BarryL · Posted: Thu Jul 25, 2013 8:59 am Post subject:

ap_sand · Posted: Thu Jul 25, 2013 11:29 am Post subject:

Hard to push on because of the internal steel braid.

They are intended for use with "AN" like end fittings, not over a barb.

miniman82 · Posted: Thu Jul 25, 2013 11:41 am Post subject:

ap_sand · Posted: Thu Jul 25, 2013 12:32 pm Post subject:

Thus my qualification of "AN" like. The point being that they are intended to be used with a fitting on the end of the hose, not pushed over a barb.

There are swaged AN hoses as well as the screw together kind too.

miniman82 · Posted: Thu Jul 25, 2013 2:21 pm Post subject:

Sure the treading is the same, but JIC fittings are typically made of steel unlike AN which normally are aluminum.
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Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

ap_sand · Posted: Thu Jul 25, 2013 5:06 pm Post subject:

Common, over the counter AN fittings may be aluminum since they are stocked for somewhat low stress applications, but by no means are they "normal". Even in light aircraft there are applications for steel AN fittings (and their equal MS ones). For example, the high pressure prop control oil to engine case fittings on my C-177 are steel.

Here is a quick grab from:
MIL-PRF-370J
7 May 2002
SUPERSEDING
MIL-PRF-370H
01 February 1999
PERFORMANCE SPECIFICATION
HOSE AND HOSE ASSEMBLIES, NONMETALLIC: ELASTOMERIC, LIQUID FUEL

(This is actually for Tanks, but it has common content with the Aircraft & Missile Spec's)

1.2.5 Material. The material used in the end fittings will be as follows:
Material A - Aluminum
Material B - Brass
Material C - Corrosion resistant steel
Material D - Steel (carbon)
Material O - Other
Material S - Contractor Specified

Regards,
Andrew
Boeing Commercial Aircraft
Engineering Operations
Engineering Bill of Materials

miniman82 · Posted: Thu Jul 25, 2013 5:58 pm Post subject:

They each have their applications, but from what I've seen a braided line is going to have an aluminum fitting 99% of the time. Only exception is hardlines, which of course have steel on steel (or titanium). For example, the lines for the LCS system on an F/A 18E are aluminum for low pressure glycol service, where flight control surfaces are fed at 3/5kpsi via swivels and steel fittings (no hose most of the time).

I'm a fleet guy with over 13 years experience. I know a thing or two about Boeing's aircraft, especially strike fighters. I know what breaks on them, and it's nothing to do with the hydraulic fittings. Usually the pilot (lol), but avionics and electrical systems are what keeps them on the ground most of the time.
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Build thread: http://www.thesamba.com/vw/forum/viewtopic.php?t=212747

ap_sand · Posted: Thu Jul 25, 2013 9:47 pm Post subject:

We're in general agreement. No use splitting the hairs.

Hotrodvw · Posted: Fri Jul 26, 2013 9:57 am Post subject:

That hose isn't anything special LOL
Why not just use 100r9 fuel hose? R9 is typically efi house, but Wilk also hold up to the ethanol in fuel now days better than 30R7 hose. No clamps? Shocked

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'67 Sunroof
Eric

78x94 with IDA's....oober fun

Horsepower is an addiction........Addictions cost
lots of money!

Hose & Fittings

SoCalJes · Posted: Fri Jul 26, 2013 12:05 pm Post subject:

Someone clue me in but I don't see any added benefit over standard stainless steel braided fuel hose. Is it that you would have steel braid but looks like a rubber hose? Think

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Jesse
71 Ghia
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Just because it didn't come that way, doesn't mean it shouldn't have.

Hotrodvw · Posted: Fri Jul 26, 2013 1:31 pm Post subject:

What he is posting is basically a one wire hydraulic hose, not fuel specific hose. Not all hose is made the same. Different models fo hose for different purposes. SS braided Teflon hose is FAR superior. The wire braid in the parker hose is for a higher pressure application....................which we will never need in the VW world.
_________________
'67 Sunroof
Eric

78x94 with IDA's....oober fun

Horsepower is an addiction........Addictions cost
lots of money!

Hose & Fittings

BarryL · Posted: Thu Aug 01, 2013 8:48 am Post subject:

This thread was originally started in the split bus forums. It got moved here after it was determined the hose that would be safe was too big.

People have been looking for a replacement for the original 5mm braided German hose. All the modern braided production is junk and dangerous as it cracks after a short while, not to mention the mess and hassle re-hosing. It has caused fire on several occasions on the pressure side of the fuel pump.

At first I thought I'd found a suitable 5mm hose but it turns out it is for diesel and that the gasoline rated hose is 1/4" which is too big for the 6mm pipe. http://ph.parker.com/us/15551/en/fire-resistant-marine-fuel-hose-221fr

As far as the "no clamp?", of course clamps are safer but the original hose had no clamps and some people go with or without. We are talking smooth pipe, no bulge, no barb, all straight fittings.

If someone knows of a killer 5mm ID hose that is bulletproof to gasoline, let us earlier bus people know about it.

tattooed_pariah · Posted: Thu Aug 01, 2013 8:51 am Post subject:


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