Reply
 
Thread Tools Search this Thread
 
Old 10 October 2009, 11:14   #1
Member
 
Country: UK - England
Town: plymouth
Make: Ribtec
Length: 6m +
Engine: Mercury 175 optimax
Join Date: Feb 2008
Posts: 350
How to pressure test a stanless fuel tank?

Is there any simple way of pressure testing a fuel tank that is fitted in situ on a rib?

The tank was supposedly pressure tested last year but I want to double check as might have some water in it.

Failing that anyone know where it can be done around the Plymouth area that would come to the boat?

Thanks
__________________

__________________
Miller is offline   Reply With Quote
Old 10 October 2009, 14:45   #2
Member
 
chewy's Avatar
 
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
Join Date: Apr 2007
Posts: 5,217
You'll have to drain all the fuel and vent the tank.
Black all holes off and pressurise to say 5-10psi, lock the pressure in and monitor for a few hours.
What pressure was it tested to last time?

Are you losing fuel out of the tank?
__________________

__________________
chewy is offline   Reply With Quote
Old 10 October 2009, 15:17   #3
Member
 
Country: UK - England
Town: plymouth
Make: Ribtec
Length: 6m +
Engine: Mercury 175 optimax
Join Date: Feb 2008
Posts: 350
Quote:
Originally Posted by chewy View Post
You'll have to drain all the fuel and vent the tank.
Black all holes off and pressurise to say 5-10psi, lock the pressure in and monitor for a few hours.
What pressure was it tested to last time?

Are you losing fuel out of the tank?
No, its seems I have got some water in there. I m pretty sure its not leaking else I would have fuel leaking into the transom well and there is nothing
__________________
Miller is offline   Reply With Quote
Old 10 October 2009, 15:17   #4
Member
 
chewy's Avatar
 
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
Join Date: Apr 2007
Posts: 5,217
So you think it could be through the filler?
__________________
chewy is offline   Reply With Quote
Old 10 October 2009, 15:27   #5
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,114
Quote:
Originally Posted by chewy View Post
So you think it could be through the filler?
or just condensation?
__________________
Poly is offline   Reply With Quote
Old 10 October 2009, 18:06   #6
Member
 
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,962
Not in anyway an officially recognised method but rather than pressure testing, vacuum test it. Seal the tank, attach a tube, suck hard and block off the tube with your tongue. If it's sealed, you'll feel the partial vacuum sucking. I sounds crude but it's effective anytime you need to check for sealing.
__________________
JW.
jwalker is offline   Reply With Quote
Old 10 October 2009, 19:57   #7
Member
 
Country: USA
Town: Seattle
Boat name: Water Dog
Make: Polaris
Length: 4m +
Engine: Yamaha 60hp
Join Date: Apr 2007
Posts: 1,152
don't suck on gas vapors

petrol is thinner than water and if its not leaking out, the water got in from bad fuel, through the fill, or from condensation.
__________________
captnjack is offline   Reply With Quote
Old 11 October 2009, 03:43   #8
Member
 
Country: UK - England
Town: Hamble
Length: 9m +
Join Date: Dec 2002
Posts: 2,317
Quote:
Originally Posted by chewy View Post
Black all holes off and pressurise to say 5-10psi,
If it's baffled 10psi may blow all the welds! 3-4 psi is fine.
__________________
It is better to remain silent and be thought a fool, than to speak and remove all doubt!
Dirk Diggler is offline   Reply With Quote
Old 11 October 2009, 03:46   #9
mdt
Member
 
Country: UK - Scotland
Town: fife
Make: Humber / searider
Length: 5m +
MMSI: ... - - - ...
Join Date: Sep 2005
Posts: 720
Get an old bike inner-tube cut it and jubilee clip one end closed and jubilee the other end over the filler flange on the tank.

Seal up the vent and fuel out pipe.

Get a bike pump and pressurise the tank and check for the leek?

Empty the fuel first
__________________
“The only difference between men and boys, is the price and size of their toys”
mdt is offline   Reply With Quote
Old 11 October 2009, 04:42   #10
JSP
Member
 
Country: UK - England
Town: Southport
Boat name: Qudos
Make: 5.4 Searider
Length: 5m +
Engine: Yam 115 V4
MMSI: 235068784
Join Date: Sep 2008
Posts: 3,930
Quote:
Originally Posted by captnjack View Post
don't suck on gas vapors
Yeah but he'll giggle his socks off so the job wont seem as bad.
__________________

__________________
JSP is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 07:21.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.