Diesel pipe

purplerobbie

purplerobbie

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I have a leak in my diesel pipe and was thinking of replacing it with rubber hose.
Is it acceptable to use rubber hose from the tank to the engine? It has copper pipe at the moment but it's sucking in air somewhere.
 
purplerobbie said:
I have a leak in my diesel pipe and was thinking of replacing it with rubber hose.
Is it acceptable to use rubber hose from the tank to the engine? It has copper pipe at the moment but it's sucking in air somewhere.
Click to expand...
as long as its the correct fire retardant grade there should be no problem.
check here for info
http://www.boatsafetyscheme.org
 
purplerobbie said:
I have a leak in my diesel pipe and was thinking of replacing it with rubber hose.
Is it acceptable to use rubber hose from the tank to the engine? It has copper pipe at the moment but it's sucking in air somewhere.
Click to expand...

I hope so, as my boat does. I also have a rubber priming bulb in the fuel line as fitted on some diesel cars. Makes bleeding and filter changes much easier.
 
It is essential to use hose made to ISO 7840 and will be marked A1/FUEL HOSE as well probably.

There are arguments in favour of flexible hose throughout, and arguments in favour of metal pipes (except for the connection to engine, which has to be flexible anyway). As a data-point my boat (built in the UK in 2004, and BSS approved) uses flexible hose throughout, so it's clearly acceptable practice.

More recently there seems to be a body of evidence accumulating which deprecates the use of copper piping. This seems to have become problematic only with the introduction of ULSD (Ultra Low Sulphur Diesel) and to have become even worse with the admixture of FAME (aka bio-diesel). For instance Deutz say:

"Contact with metals with a catalytic effect, above all copper or brass, must absolutely be avoided. These materials must not be used at all in the storage system (e.g. pipes, screws, pumps, etc)."

"Even small traces of Zinc, lead and copper can lead to deposits in the injection nozzles, especially in the modern common rail injection systems.
...Materials containing copper (copper pipes, brass parts) must also be avoided because they can lead to catalytic reactions in the fuel with subsequent deposits in the injection system"

I found similar statements from BP, Chevron, Caterpillar, Cummins, and the US standard ASM D975: Standard Specification for Diesel Fuel Oils, https://law.resource.org/pub/us/cfr/ibr/003/astm.d975.2007.pdf which states:
"X3.7.2 Copper and copper containg alloys should be avoided. Copper can promote fuel degradation and may produce mercaptide gels."
 
jdc said:
As a data-point my boat (built in the UK in 2004, and BSS approved) uses flexible hose throughout, so it's clearly acceptable practice.
Click to expand...

Ariam, built in Sweden in 1998, also uses flexible hose exclusively. Personally I prefer it to copper tube, as it can't crack due to movement and I regard barb-and-clamp connections as more reliable than compression fittings (and you tend to need fewer joints in the first place).

She was coded for charter by the previous owner, so hoses seem to be acceptable there too. There was a pair of shutoff valves on the fuel supply and return pipes which had clearly been retrofitted, so I assume they were a coding requirement (the previous owner doesn't seem to have been interested in modifications and improvements otherwise).

(I removed the shutoff valves as they were basically pointless, the fuel tank being in the engine bay anyway and having isolation valves on the dip tubes.)

Pete
 
>I have a leak in my diesel pipe and was thinking of replacing it with rubber hose.
Is it acceptable to use rubber hose from the tank to the engine? It has copper pipe at the moment but it's sucking in air somewhere.

I had exactly the same problem and replaced copper with hose. I took the opportunity to put two filters in parallel with on off switches so you can change if one is blocked. All mobos have that system.
 
purplerobbie said:
I have a leak in my diesel pipe and was thinking of replacing it with rubber hose.
Is it acceptable to use rubber hose from the tank to the engine? It has copper pipe at the moment but it's sucking in air somewhere.
Click to expand...
Benes come with rubber as standard. I bought some more to put a squeezy bulb in circuit. i got it off ASAP. It has an extra layer on the outside which gives it its fire retardiness
S
 
The short life of the spill back hoses on my car would make me cautions about extensive use on the boat. I have had to replace them all twice on the car.
 
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