Hydraulic components (was Re: [AT] (no subject)

[carl gogol]

The topic of using galvanized pipe for natural gas or propane caught my 
attention enough to do some searching on the internet and although there are 
a lot of reasons to not trust anything, I found a site that concerned 
technology transfer to smaller gas suppliers that do not have their own 
corrosion engineers on staff.  From what I gathered, galvanized pipe is not 
good enough to be used underground for gas distribution, better coatings are 
required or a system of sacrificial anodes have to be installed if black 
steel is used instead of the preferred plastic systems.  16" above ground 
galvanized pipe is OK, as long as it is electrically isolated and not mixed 
with black pipe.  Mixing creates a dissimilar material joint that turns the 
galvanized pipe into an anode which leads to corrosion.
Carl Gogol
Manlius, NY
(2) AC D-14, AC 914H
Simplicity 3112 & 7116
Kubota F-2400

----- Original Message ----- 
From: "Ralph Goff" <alfg at sasktel.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Sunday, January 09, 2005 1:14 PM
Subject: Re: Hydraulic components (was Re: [AT] (no subject)


>
>>> Sounds like one of the old  wives tales to me. I have seen galvanized 
>>> pipe
> on
>> lots of hydraulic systems, I  have one out in the yard right now. The 
>> only
>> thing that I would think is that  its actually a zinc coating and that
> could
>> work like the zinc plates around a  Prop on ships and would be eaten away
> by
>> electrolyses . I don't see where this  would hurt anything but the pipe
> would not
>> last as long as black iron pipe.  However how long is that, most likely
> longer
>> than we would have to worry  about.
>
> I can't say that I have ever heard any warnings on what kind of pipe to 
> use
> for hydraulic or fuel oil systems. I know I have galvanized pipe outlet on
> my diesel storage tank, probably for about 25 years now.
> The front end loader on my Massey has what appears to be ordinary iron 
> pipe
> for the hydraulic lines to the bucket. They have been on there since 
> before
> I got the tractor and have not given any problems.
>
> Ralph in Sask.
> http://lgoff.sasktelwebsite.net/