[T3] Is there a real issue with using 5/16" ID fuelhoseratedSAE 30 R7 ?

[William J]

The only parker fuel hose that seems to be able to deal with E-10 and this 
one is E-100 . The 395 series says ethanol yet is still SAE 30R7 . Yes 
finding it in small amounts seems impossible . The Gates brand you can get 
25 feet for less the $50 Which is about the same as far as ID and ethanol .
----- Original Message ----- 
From: "Jim Adney" <jadney at vwtype3.org>
To: <type3 at vwtype3.org>
Sent: Wednesday, August 23, 2017 3:06 PM
Subject: Re: [T3] Is there a real issue with using 5/16" ID fuelhoseratedSAE 
30 R7 ?


> On 23 Aug 2017 at 14:02, William J wrote:
>
>> Jim what part number Parker hose do you use?
>
> I went out to see exactly what I have at the moment and here's what I 
> find:
>
> a few feet of Aeroquip FC235-5, 30R1/6, now discontinued, but I'm hoarding
> it for myself even though it's dated 3Q95.
>
> a lot of Parker 5155-5, 30R3, which I can't find on the Parker site.
>
> a lot of someone's 5/16" 30R7
>
> I've never been able to make any sense of the SAE categories (30R???.) I
> even spend an hour in the engineering library where they are supposed to
> have all the SAE stuff and couldn't find it. It's probably there, but I 
> just didn't
> know where to look, and the SAE standards seemed to occupy a whole wing
> of the library.
>
>> I looked at their site and see a few different hoses for gasoline with
>> Ethanol yet they don't talk much about if one can use FI type clamps
>> yet the sell stainlees steel worm clmaps for low pressure systems.
>
> For 30 psi, I don't think the clamp style is very important. Most anything 
> will
> work. For higher pressures, the clamp style becomes important. That said,
> you have to be careful with the worm gear clamps on small diameter hose
> like ours. The small clamps have "buckles" that are arced to fit the small
> radius, but if you buy larger clamps and snug them down, they will tend to
> leak at the buckle.
>
>> I saw some fuel lines that are rated 30r7/ ? and some that state 5 year
>> life span.
>
> 5 years might be a reasonable lifetime in some situations. I find that 
> good
> hose lasts much longer than that in our cars, but cheap hose may last much
> less than 5 years.
>
>> I didn't see the ethanol rating for the fuel line for engine
>> application
>
> I think anything sold these days as the automotive fuel hose is going to 
> be
> ethanol compatable. Parker 395 series, plus the TBE and TBSE hoses look
> good for our applications. I'd tend to stick with the 395 or the TBE 
> because
> of the actual ID, but the TBSE has the smallest permissible bend radius, 
> 55
> mm.
>
> The biggest problem is likely to be finding someone who has stock from
> which they're willing to sell you a few feet. In my years of buying hose, 
> I've
> usually ended up buying 50-100 feet at a time to get good hose at a
> reasonable price. I don't sell much these days, but over the years, i've 
> sold
> and installed a LOT of 5/16 hose.
>
>
> -- 
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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