Are you still searching for a liquid storage tank, so why is the right one confused? You have come to the right place, don&#;t worry. Both are used for the storage of liquid be it epoxy coated or glass fused to steel tank.
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Remember that each tank has its own advantages and disadvantages. If you want to find the best tank, consider its advantages and disadvantages, which ideally suit your needs. In this post, you will find out which tank according to your application is the best for you.
If you have a small budget but you want the best tank, nothing could be better than a covered epoxy tank. This tank is the best alternative, because it can be used in a broad range of applications. This type of tank is suitable for limited capacity and has a major cost advantage over other materials. If you want the reliability of your tank improved, go to that tank.
This tank will be replaced after 20 years in most applications. However, for waste water tanks and leachate tanks the longevity can be shorter. In the past there has been a dispute of epoxy coated tanks in both utilities and businesses. However, the technology improved to include denser steel, an advanced bolt design, and less penetration points, all in order to address past flaws and buyers&#; concerns.
Like over time, requirements for storage capacity are changing to expand the epoxy-coated tank. This tank is also also one of the easiest and most economical solutions.
Due to its high long life, this type of tank is extremely common and demanded on the market. The glass integrated into a steel tank resisting the rigors of the construction site is very nice, offering a long service life even in chemical and rugged surroundings. It is suitable for countless applications because of its fused coating; but no other tank can beat this tank when it comes to carrying aggressive liquids such as wastewater or wastewater because the tank coating will readily withstand chemical attacks that will inevitably destroy and ruin other types of tanks.
This tank needs much lower maintenance and can be repainted and washed with a power washing device. It is possible to extend GLS tanks easily to meet evolving requirements over time.
The cost of this tank is one of the major drawbacks. This tank is costly relative to epoxy tanks, which many businesses cannot afford.
No universal right tank is therefore available. If you want to buy the best tank for your company, first consider your requirements, budgets and specifications. Note that tanks often adjust so that you have the latest, up-to-date details before you buy.
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I'm looking to replace a 22K gallon bolted carbon-steel effluent holding tank. The tank holds treated wastewater (very clean). The client wants us to look into both FRP, plastic and mild carbon steel, but I can't seem to find any text on why to choose one over the others. I know FRP is generally used for USTs, but I can't find *why*. Does anyone have any suggestions on where to find this info? Any advice would be appreciated.
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Cd........You seem to have many overlapping questions. All of the type of tanks that you have mentioned have been used to hold various types of waste water................. It is all a question of price............................ For a single tank of 22,000 gallons, you probably will not find a "plastic" (HDPE) tank of the appropriate size. I suggest that you consider a factory-welded, flat bottomed carbon steel tank with a premium internal coating ( about 12 ft diameter and ~ 26 foot sheel)........ Compare the price of that tank with an FRP tank configured with a suitable interior resin coating. I would guess that the FRP tank would cost about twice as much..................... MJC
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Ok, that helps a bit. I can expect a higher cost for an FRP tank. I managed to get a quote for an HDLPE (1.5 and 1.9 sp.gravity) tank, but due to stability issues they can't include all our nozzles, and don't offer side access. I'm assuming because this water is super clean and almost potable, the difference in chance of corrosion between FRP and carbon steel wouldn't be that great, and therefore we should go with the lower cost tank. Thanks for your help.
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For almost all tank configurations, FRP will always be more expensive than carbon steel................ In my opinion, it is hard to beat a carbon steel tank, WITH THE PROPER COATING in wastewater service......You haven't mentioned the interior/exterior coating system that you will use. I am guessing here, but have you considered a coal-tar epoxy interior coating coupled with a good epoxy or urethane exterior coating ?.....Tell us more about the nature of the wastewater.....are there clorides present ?...........What is the pH ?.......MJC
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The current coating is ThermoThane, which is a baked on coating. The tank has been in operation since . It holds treated wastewater, which has shown ND for just about everything, with a couple ppb of iron hits about 3 months out of the last 10 years. The pH of the water runs about 8.2-8.3. There's a leaking crack along the bottom of the tank, which is the reason we're trying to ammend the situation. The reason is unkown. It's speculated that it may have been damaged in original transit, or that the concrete pad (which was poured in 2 parts, ring and interior) developed some divots due to the fact that it was poured in December with snow on the ground. Currently I'm collecting some info on repairing the tank- the best bet seems to be a trowelled liner - Micor 320
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I think repairing the area and repairing the liner is a better solution all-around. Following the postings, I suspect the construction of the shell the floor joint is more likely at issue than the ring foundation regardless of the devit remark. I would suggest reveiwing the joint design to determine if you need to revisit the entire joint. It is still less money than a new plain carbon steel tank. I am sure others will present their excellent opinions as well and look forward to them. L.
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Thanks for your comments. We've decided to bring in an outside expert to assess the exterior of the tank. At this point if we replace/repair the interior liner, the exterior corrosion would likely be the cause of any future failure. We're looking toward at least 20 more years of this project. Recoating is becoming more of a likely option (the powers that be have decided we'll either repair or go for a new steel tank), but the price of repair keeps creeping toward the price of a new tank. At $20-$25/sqft, it gets up there. We're currently looking at ~$15K difference between the two, but hopefully the expert can help us out with the life expectancy for one vs. the other.
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I wouldn't dimiss FRP altogether as being more expensive! The cost of linings, coupled with the escalating cost of carbon steel has narrowed the gap between the two materials. Additionally, your application is not that aggressive and can likely be handled by a fairly economical resin and corrosion barrier system. External gel coats and UV inhibitors will extend the life of what I assume is an outdoor application. Your existing steel tank has developed leaks after 11 years. That seems pretty short for steel tank life. Depending on the root causes, FRP may be an economical option when life cycle costs are calculated.
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John- Thanks for your comments, although they came just a teeny bit too late. All parties involved (not that I'm vouching for the knowledge or common sense of the parties) have decided to go with either carbon steel (bolted or lap welded) OR repair, so that's where my efforts are currently headed. BUT, I can think of a few other applications where FRP would be a great option. I'll certainly keep your comments in mind.
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CD......could you, at a later date, tell us the final total repair/replace cost comparison for your particular tank ? I believe that this would be useful to many of us......I do a lot of cost estimates and would be grateful for some up-to-date numbers on coatings/tank unit costs.........Regards,....MJC
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Sure, no problem. I'll be finishing this up toward the middle of next week and should be able to get you some relevent numbers. We'll also be making a decision on our tank middle of next week. I'll let you know what we decide to do.
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