Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 25-06-2008, 11:00   #1
Provocateur & Raconteur
 
knottybuoyz's Avatar

Cruisers Forum Supporter

Join Date: Nov 2005
Location: Iroquois, Ontario
Boat: Bateau.com TW31 Modified
Posts: 3,583
Images: 87
Question Tanks, tanks & more tanks

So decision time. The kid is entering an industrial metal fabrication and welding trade school in the fall. I've spoken to another father who's son was in this program a few years ago and he had them fabricate a number of items in their shop class. He paid for the materials, gave them the basic dimensions and they did the design and fabrication. I'm considering doing the same if we can. So can I have them make aluminum tanks for fuel, fresh water and waste? The tanks will be approx. 35 gal, .125 5052 marine grade aluminum. I've heard aluminum tanks aren't all that great if you put clorinated water in them so should I stick with a poly tank for F/W?
__________________

__________________
Yours Aye! Rick
~^~^~^^~^~^~^~^~^~^~^~~^~^~~^~^~^^~~^~^
"It's not the boat "you built" until you've sworn at it, bled on it, sweated over it, cried beside it and then threatened to haul the POS outside and burn it!"
knottybuoyz is offline   Reply With Quote
Old 25-06-2008, 11:55   #2
Registered User
 
Stranded Mariner's Avatar

Join Date: Sep 2007
Location: Shanghai, China
Boat: Dix 43 CC, steel, 43 ft
Posts: 149
Send a message via Skype™ to Stranded Mariner
Why would you use aluminium tanks? If you want to go for metal tanks, I would suggest stainless steel.
__________________

__________________
'How inappropriate to call this planet Earth when it is quite clearly Ocean.' - Sir Arthur C. Clarke
Stranded Mariner is offline   Reply With Quote
Old 25-06-2008, 12:23   #3
Provocateur & Raconteur
 
knottybuoyz's Avatar

Cruisers Forum Supporter

Join Date: Nov 2005
Location: Iroquois, Ontario
Boat: Bateau.com TW31 Modified
Posts: 3,583
Images: 87
Quote:
Originally Posted by Stranded Mariner View Post
Why would you use aluminium tanks? If you want to go for metal tanks, I would suggest stainless steel.
I don't know. What would be the cost difference?
__________________
Yours Aye! Rick
~^~^~^^~^~^~^~^~^~^~^~~^~^~~^~^~^^~~^~^
"It's not the boat "you built" until you've sworn at it, bled on it, sweated over it, cried beside it and then threatened to haul the POS outside and burn it!"
knottybuoyz is offline   Reply With Quote
Old 25-06-2008, 14:34   #4
Senior Cruiser
 
Alan Wheeler's Avatar

Cruisers Forum Supporter

Join Date: Dec 2003
Location: Marlborough Sounds. New Zealand
Boat: Hartley Tahitian 45ft. Leisure Lady
Posts: 8,038
Images: 102
Difference in cost is staggering. The SST being very expensive. Aly is fine for all tanks except blackwater. It is too acidic and I am not sure I would want to trust SST in that role either. Although you could internally coat it with a liquid rubber type coating, Like PRC or similar liquid coating. Aly is certainly light and easy to work with.
__________________
Wheels

For God so loved the world..........He didn't send a committee.
Alan Wheeler is offline   Reply With Quote
Old 25-06-2008, 15:15   #5
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Nevada City. CA
Boat: Sceptre 41
Posts: 3,745
Images: 9
If I had my way I think I would do Stainless on the water tanks, Aluminum on the fuel tanks, and poly for the waste tank. Here is my reasoning. I've tasted water from stainless and aluminum tanks. The stainless tastes better. Aluminum seems to be good for fuel tanks no logic to that one except to save $$$. I would buy a poly tank for the waste b/c they are not as suseptible to the caustic materials that they are used for. Another thing would be on the poly tanks I would use a standard size so that if I had to replace it it would be easy to do.
__________________
Fair Winds,

Charlie

Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
Charlie is offline   Reply With Quote
Old 25-06-2008, 15:44   #6
Senior Cruiser

Cruisers Forum Supporter

Join Date: Nov 2005
Location: Tasmania
Boat: VandeStadt IOR 40' - Insatiable
Posts: 2,317
Images: 91
stainless, in my opinion, is worth the extra cost.
__________________
Weyalan is offline   Reply With Quote
Old 25-06-2008, 16:10   #7
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Would the school (instructor) ensure that they meet all relevant guidelines and regulations?

If so then aluminum fuel tanks, stainless water tanks, and plastic waste tanks. Although a good filter will remove the taste from the water tank, so could be aluminum as well. Make sure you have pickup and return lines for polishing as well as for engine and generator (?). These should all be kept separate. Welding bosses in the clean-out hatches are great for attaching the pickup/return tubes.

Get the article "Diesel Fuel Tank Design: Materials, Maintenance and Connections" in the April 2007 PassageMaker Magazine.

Life expectancy of any tank has a lot to do with the way it is mounted and cared for. If the tank is mounted and cared for properly it will likely last the lifetime of the boat.
__________________
The Blue Dot Campaign. This Changes Everything.
DeepFrz is offline   Reply With Quote
Old 25-06-2008, 22:13   #8
Registered User
 
Stranded Mariner's Avatar

Join Date: Sep 2007
Location: Shanghai, China
Boat: Dix 43 CC, steel, 43 ft
Posts: 149
Send a message via Skype™ to Stranded Mariner
I remember there were studies linking aluminium in drinking water to Alzheimer's disease. Don't know how much aluminium would dissolve when you use it for fresh water tanks. But I would not like to take the risk.
Stainless will be more expensive, but for me it would be worth it.
__________________
'How inappropriate to call this planet Earth when it is quite clearly Ocean.' - Sir Arthur C. Clarke
Stranded Mariner is offline   Reply With Quote
Old 26-06-2008, 01:30   #9
Senior Cruiser
 
Alan Wheeler's Avatar

Cruisers Forum Supporter

Join Date: Dec 2003
Location: Marlborough Sounds. New Zealand
Boat: Hartley Tahitian 45ft. Leisure Lady
Posts: 8,038
Images: 102
Quote:
I remember there were studies linking aluminium in drinking water to Alzheimer's disease.
Who ever did the studies, now say that it has no relevance. But SST could also be considered Toxic. Chromium is very toxic and no one has ever tested SST to see if we get Chromium from the alloy.
__________________
Wheels

For God so loved the world..........He didn't send a committee.
Alan Wheeler is offline   Reply With Quote
Old 26-06-2008, 04:11   #10
Moderator Emeritus
 
Pblais's Avatar

Join Date: Mar 2003
Location: Hayes, VA
Boat: Gozzard 36
Posts: 8,700
Images: 15
Send a message via Skype™ to Pblais
Probably best not to drink water and avoid all manners of problems.
__________________
Paul Blais
s/v Bright Eyes Gozzard 36
37 15.7 N 76 28.9 W
Pblais is offline   Reply With Quote
Old 26-06-2008, 09:59   #11
Registered User
 
Stranded Mariner's Avatar

Join Date: Sep 2007
Location: Shanghai, China
Boat: Dix 43 CC, steel, 43 ft
Posts: 149
Send a message via Skype™ to Stranded Mariner
Quote:
Originally Posted by Pblais View Post
Probably best not to drink water and avoid all manners of problems.
I can agree on that mate!
__________________
'How inappropriate to call this planet Earth when it is quite clearly Ocean.' - Sir Arthur C. Clarke
Stranded Mariner is offline   Reply With Quote
Old 26-06-2008, 10:06   #12
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Nevada City. CA
Boat: Sceptre 41
Posts: 3,745
Images: 9
Quote:
Originally Posted by Pblais View Post
Probably best not to drink water and avoid all manners of problems.
I agree and to misquote a song by Bobby Bare: "Forget the water there are carsogenics in it. Stick to Women, Whiskey and Sweet . . . Red . . . .Wine." And Boats
__________________
Fair Winds,

Charlie

Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
Charlie is offline   Reply With Quote
Old 26-06-2008, 11:47   #13
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Quote:
Stick to Women, Whiskey and Sweet . . . Red . . . .Wine
Oh, oh, they are all mostly water!
__________________

__________________
The Blue Dot Campaign. This Changes Everything.
DeepFrz is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sealing access ports on stainless steel water & diesel tanks? mestrezat Construction, Maintenance & Refit 1 22-05-2008 23:07
flexible tanks captpete Plumbing Systems and Fixtures 6 16-03-2007 09:12
See through propane tanks. Jentine Plumbing Systems and Fixtures 39 27-11-2006 01:02
accumulator tanks northerncat Plumbing Systems and Fixtures 6 13-08-2006 22:07
Fuel Tanks 1sailaway General Sailing Forum 7 03-11-2004 03:53



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 13:56.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.