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Old 09 February 2003, 13:16   #1
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Assistance Required for SS Tanks

Hi to all (again LOL )

I have finally got to the end of the ordeal called 'building a RIB to race and for leisure' however we have now reached the point of the tanks.
The idea (originally) was to fit plastic tanks but they only come in 70 ltrs as standard in SAfrica and to buy bigger will cost me a fortune. Also I would have needed 3x70 ltrs to have adequate fuel to finish a race or to just take it safely to France for a day or two.
The question to you all is (since I'm not an expert on tanks) shall I fit SS tanks?
If yes shall I fit them on deck for easy inspection or inside the hull?
If the SS tanks is a good idea does anyone know any good SS tank manufacturer in the UK who would be able to give some sound advise??
Any info highly appreciated.
Cheers
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Old 09 February 2003, 14:06   #2
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Manos, I seem to remember discussing stainless steel fuel tanks with Dirk just before Christmas in the thread of all threads, but we don't want to go there I think.

Never had a problem with stainless steel tanks other than in the UK if you leave them empty over the winter then they breath moisture in bit by bit, as the weather and temperature changes so you end up with a small amount of water in the tank. A good water seperator will sort that, and I recommend a diesel one and the filtration is finer.

Tanks below the deck are great for freeing up space but getting at the sender unit when its below a glassed in deck can be fun. Alternatively fit a flow meter.

Seen lots of ways to fit S/S tanks. I like the Osprey way. They rap the whole tank in GRP then glass that into the boat. Although the GRP doesn't stick to S/S, because its rapped up in a blanket of GRP the tank isn't going to move. In the unlikely event you do need to change it, then its an angle grinder job to cut through the GRP to get it out.

One tip though, stick a rag in the filling hole whilst you fit them. Managed to drop a small torch into a glassed in tank which promptly shattered and the batteries rolled out behind the baffles. (Long story for a winters night and a log fire).

Pete
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Old 09 February 2003, 14:50   #3
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Sorry, I think this is a case of mistaken identity, it wasn't me discussing fuel tanks, but If I was going to I would reccommend ally.
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Old 09 February 2003, 15:57   #4
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tanks

As far as I know 55 l plastic tanks for example are available in the plastimo catalog, send Tim a email he will tell you where we got a 55 l plastic tank , there was other sizes available too, we also run two stainless tanks 50 l each howver , I had to remove one this weekend as a weld had split 2 inches long and it leaked fuel, this was possible as it was above deck, so bear this in mind if fitting equipment below deck, have you ever seen the flexible tanks fitted each side of an RNLI D class lifeboat, gavin
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Old 09 February 2003, 16:19   #5
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Dirk, my apologies, if it wasn't you.

Pete
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Old 10 February 2003, 03:30   #6
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The problem with ally tanks in the UK is they "pant" which causes the welds to crack. There is not doubtt that you will be using the boat very hard and stainless is the only way to go. Bear in mind they are only as good as the manufacture. I would suspect that the people who have had problems in the past have had S/S tanks made by people who are not that good. SOC has two 1500ltr tanks that form part of the cabin floor and we have never had any problems. Alan P
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Old 10 February 2003, 04:15   #7
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Thanks to All

Pete7 you were right in saying that we were discussing the prons and cons of SS tanks Vs plastic. I am still not convinsed that SS tanks are any better than their plastic cousins.
Gavin 55 ltr plastic tanks will not be sufficient (I have a 200 bhp VMax F2 modified on the boat) which in full throtle drinks like mad more than a Honda 4-stroke 200 bhp (I was told - so don't come bashing my head about that comment LOLOL )
AP as you know due to the very light weight of the boat and the amount of petrol I'll have to use I will have to fit SS tanks.
However, I'll fit them on deck rather than inside the hull one forward one aft so if anything goes wrong to be able to repar them quickly and without major sergury on the deck (thus avoiding to compromise hull integrity).
In any event I would need to see how much these tanks cost in this country and whether anyone knows of a reputable SS tank manufaturer who can help
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Old 10 February 2003, 04:15   #8
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Thanks to All

Pete7 you were right in saying that we were discussing the prons and cons of SS tanks Vs plastic. I am still not convinced that SS tanks are any better than their plastic cousins.
Gavin 55 ltr plastic tanks will not be sufficient (I have a 200 bhp VMax F2 modified on the boat) which in full throttle drinks like mad more than a Honda 4-stroke 200 bhp (I was told - so don't come bashing my head about that comment LOLOL )
AP as you know due to the very light weight of the boat and the amount of petrol I'll have to use I will have to fit SS tanks.
However, I'll fit them on deck rather than inside the hull one forward one aft so if anything goes wrong to be able to repair them quickly and without major surgery on the deck (thus avoiding to compromise hull integrity).
In any event I would need to see how much these tanks cost in this country and whether anyone knows of a reputable SS tank manufacturer who can help
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Old 10 February 2003, 04:57   #9
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Tanks

Hi Manos

I use Fiberglass tanks and have done for the past 7 years, Had no problems at all with them. We have an inspection hatch on the decjk which gives us easy access to the fuel sender etc. We can also remove a large section of the fuel tank to get inside it too make sure its ok and clean any muck out if needed. I have no idea how much they cost though.

Julian
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Old 10 February 2003, 05:05   #10
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Hi Julian

I have thought about fibreglass tanks. They seem to work on small boats using petrol engines.
However, the problem with the Falcon is that the deck is an integral part of the hull and therefore although you can make small inspection hutches if anything goes wrong and you have to cut through the deck you compromise hull integrity.
This is a difficult one. I will check also with West marine see what plastic tanks they do (I know they do 100+ltr plastic petrol tanks) need to see dimensions and decide.
Anyway I have sometime to see what I will do at the end.
Thanks for the suggestion Julian much appreciated
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