Snyder Industries 275 Gallon Sulfuric Acid Double Wall Tank

Marked Tree, class 250, and a footprint that fits a dock

The freight story on this one is the easiest of any contained tank we sell, and that is genuinely part of why people buy it. It is moulded at Marked Tree, Arkansas, and the sheet lists Arkansas as the state it ships from, which puts the mid-South, the Gulf and the lower Midwest on a short lane. The freight class is a numeric 250 rather than an oversize mode, and the shell is 47 inches across and 63 inches tall, which is a shipment that goes on an ordinary trailer, comes off on an ordinary dock and turns an ordinary corner. Price the lane to your ZIP with the freight cost estimator before you compare it with anything else; the listed price is before freight. That small footprint is the whole argument for this size of contained vessel. A single wall tank of similar volume with a built bund around it needs a slab, a curb, a coating and a drain arrangement, and it occupies a rectangle of floor rather than a circle 47 inches across. Here the containment arrives with the tank, in the same circle, on the same delivery, and it does not need a contractor. Site it on flat, continuous, level bearing across the whole base, with no point loads and no soft corner, because what arrives through that base is 2,294 pounds of water at 8.34 pounds per gallon and 4,358 pounds at the rating on this sheet. Where the pad has to be poured for it, size it properly rather than by eye; the concrete pad sizing framework sets out the method and where its boundary lies. One more thing belongs in the siting decision. The volume you can actually use in a contained vessel is not the nameplate, because the freeboard depends on the density and the thermal expansion of what goes in it; the Captor freeboard sizing guide works out the real number. Check it against your demand in the tank sizing calculator and take the headspace rule from the tank sizing guide.

Four two seventy-fives, a two fifty and a three sixty

Four of these six are the same 47 inch by 63 inch shell at the same 200 pounds, and the only thing separating them on the sheet is the name the maker gives each listing. This one is named for sulfuric acid; the other three are named as ASTM listings in cross-linked or high density wall. The sheets publish no concentration, no strength and no exposure rating for any of them, so this page will not tell you which chemistry belongs in which shell. Give us the product, the strength and the temperature and we will point you at the right part number, because that is a conversation and not a table. The two remaining rows are where the sheet is genuinely useful. 5990502N42 holds 250 gallons in a 34 inch circle 83 inches tall at 150 pounds: thirteen inches narrower and twenty inches taller than this tank, which is the listing to look at when floor space is the constraint and the ceiling is not, such as a corner of a plant room or a space between two skids. 5760102N30 holds 360 gallons in a 53 inch circle at the same 63 inch height and 250 pounds, which is a third more volume for six more inches of diameter and no extra height at all. If the room has the width, that row is worth a look before you settle here, because it buys a longer interval between deliveries without changing the doorway, the clearance or the lift.

Ready to choose a row? Add the 275 gallon tank to your cart above with freight quoted to your ZIP, or 866-418-1777 will confirm it against the site first.

One opening: the eighteen inch threaded vented manway

• The fill: an 18 inch threaded vented manway, at the top of a 63 inch shell, which is a comfortable working height for a fill connection without a platform. It is the fill point, the inspection point and the only opening this sheet publishes.
• The vent: the manway is listed as vented. That path is what protects the wall while a pump draws the level down and while the contents warm through a day. Keep it clear, look at it whenever the manway is opened, and never restrict it.
• The outlet field: it reads "1 Manway / Lid", a count of openings rather than a size. No outlet dimension appears on this sheet, so none is stated here. Tell us how the product arrives and how it is drawn off and we will confirm what this part number carries before it ships.
• The second wall: the containment is part of the vessel. The sheet publishes no containment percentage and no code listing, and this page claims neither. What the arrangement does mean in practice is that there is an interstitial space, and how you monitor it is worth deciding at order time rather than after commissioning.
• The chemistry: the maker names this listing for sulfuric acid and the sheet gives no concentration, no strength and no service temperature beyond 120 F / 48 C. Name your product and its strength when you enquire; the gasket, any fitting and the handling arrangement all follow from it.
• Limits: 120 F / 48 C, a specific gravity rating of 1.9, and a 3 Year Warranty. That is the extent of what this sheet publishes.

Where the reason for a contained vessel is a written plan rather than a preference, the Captor double wall spill prevention walkthrough sets out what a contained tank does for that plan and what it does not; the specific answer for your site comes from the plan and the authority that reviews it.

A small volume of a heavy chemistry, held twice

Two hundred and seventy-five gallons is a working stock rather than a bulk store, and a contained vessel at that volume is bought by operations that keep a modest quantity of something serious close to where it is used: a municipal water or wastewater plant with a dosing point, a cooling tower or boiler house holding a treatment chemical beside its pump, a metal finishing or plating line, a pulp and paper or food processing sanitation loop, a laboratory or pilot plant, and any site where the tank stands indoors, on a hard yard, near a drain or above a water table. In every one of those the second wall is not a luxury and it is not a preference; it is the cheapest form of the answer to what happens when the inner vessel fails. The alternative on a volume this small is a bund built around a single wall tank, which costs a slab, a curb, a coating, a drain decision and a floor area nobody gets back, and then has to be inspected for the rest of its life. Buying the containment moulded in removes all of that from the schedule, and it is why this size sells steadily to people who have built the other kind once.

Two weights on one sheet and the one the carrier reads

Marked Tree, Arkansas, is the moulding plant and Arkansas is the state the sheet lists it as shipping from. What the carrier bills against is the freight class and the dimensions, so take the real number for your ZIP from the freight cost estimator; the listed price is before freight. The shell is 47 inches across and 63 inches tall, which is inside an ordinary doorway and inside an ordinary aisle, so this is a delivery that can be taken on a forklift and moved with a pallet jack rather than one that needs a crane and a route survey. Take the tank to its final position before anything is connected, check it sits level in both directions on the finished pad, and fill it with clean water to hold that 2,294 pound load while somebody reads the manway and walks the outer shell at ground level. Drain it, let it dry, and only then bring the working chemistry to it. Keep the maker's paperwork with the site file rather than the tank, because the label on a contained vessel outlives the folder nobody can find. Leave room to walk all the way around it; the side of the tank nobody can see is the side that leaks.