Snyder Industries 5000 Gallon 1.9 s.g. Double Wall Tank for Sulfuric Acid

Named for sulfuric acid, and heavier on the line than two of its own siblings

Four part numbers hold 5000 gallons in this exact shell, and the sheet separates them by name and by weight. This is the tank Snyder names for sulfuric acid service, listed at 4,300 pounds empty. Beside it, 5630000N42 is a cross-linked tank also listed at 4,300 pounds, while 5630000N40 and 5630000N46, a cross-linked tank and a cross-linked black tank, are both listed at 3,600 pounds. The sheet gives all four figures in one 102 by 102 by 216 inch envelope and explains none of them, so this page prints what it says and leaves it there. What that means for a buyer is that the choice inside this group cannot be made from the dimensions, because there are no dimensional differences: it is made from the duty name and the resin, and it is made with the liquid, its temperature at the inlet and its temperature at rest in front of us. A tank named for a specific service by its manufacturer is the most authoritative statement on the page, and it is also a statement with edges: it names a service, not a concentration, not a temperature window and not a shelf life, and this page will not invent any of those. Where the tank stands is the other half of the purchase, and at eighteen feet of height on an eight and a half foot base it is a serious one. The slab carries 41,700 pounds of water, or up to 79,230 pounds of contents at the rating, and a rotationally molded floor bears on every part of the surface it touches and nothing else, so the pour is flat, level, continuous and wider than the tank rather than to its edge. On a contained tank that pour matters more than on a single wall one, because the outer shell is what stands on it and the outer shell is the part you cannot see under. The framework for getting it right is in the concrete pad sizing guide. Before the order, run 5000 gallons against your delivery size and your real consumption in the tank sizing calculator, and take the reserve you should never dip into and the freeboard a warming liquid needs from the tank sizing guide.

Four 5000s in one 102 inch shell, with a 4500 and a 5500 beside them

The bottom two rows are where the real choices live, and they pull in opposite directions. The 4500 gallon 5620000N30 keeps this base, 102 inches square, and takes the height down to 197 inches at 3,800 pounds; that is the tank for a site where the footprint is settled and the headroom is not, and Snyder names it for the same service this one is named for. The 5500 gallon 5660000N40 goes the other way entirely: a 120 inch base and 172 inches of height at 3,200 pounds, which buys 500 more gallons while standing lower than every 5000 gallon tank in the table. On a site with a canopy, a mezzanine, a crane hook height or a fill point that cannot move, that row is often the right answer even though it is the bigger tank, and it is worth checking before you accept eighteen feet of height as a given. Inside the 5000 gallon group, understand what the table does and does not tell you. It tells you two tanks are listed at 4,300 pounds and two at 3,600 in the same envelope, which is a fact from the sheet. It does not tell you why, and no wall thickness, containment volume or annulus figure is published anywhere on the sheet to explain it, so nothing here should be read as a wall comparison. Bring us the liquid and the duty and we will confirm the part number against Snyder's current documentation. Where the question behind the tank is a site obligation rather than a chemistry one, the Captor double wall compliance walkthrough sets out what a contained installation actually has to satisfy.

Comparing across brands too? Call 866-418-1777; we carry Norwesco, Snyder, Chem-Tainer, Enduraplas and Bushman and will say which one fits, or price the freight first.

Breathing an eighteen foot tank through one manway

• Start with the vent, because on a tank this tall it is the fitting with the most work to do. The sheet publishes one top opening, an 18 inch threaded vented manway, and that vent is the only breathing path it gives. A 5000 gallon fill displaces 5000 gallons of air and a 5000 gallon draw pulls it back; a blocked vent turns a pump into a vacuum source on a wall eighteen feet tall. Keep it clear, put it on the inspection list by name, and never cap it to keep weather out.
• Headspace next, and on this shell it is a genuine engineering item rather than a rule of thumb. Vapour collects above the liquid line, the shell is tall enough for real thermal stratification, and a liquid that warms after delivery has to have somewhere to go. Leave the freeboard rather than filling to the manway, and take the sizing logic from the freeboard sizing guide.
• Access: 18 inches at 216 inches of height means the manway is a platform, a ladder and a fall-protection conversation before it is a fitting. Plan that access into the installation rather than improvising it later, because it is the only route into the inner tank and it is where every inspection starts.
• Outlet and inlet: the sheet publishes neither for this tank, so neither is claimed here. Fittings, sizes and positions are confirmed with us at order against Snyder's current documentation, before a hole exists and before pipe is bought.
• Service limit and warranty: 120 F / 48 C, with a 3 year warranty as the sheet gives them. On a tall white shell in open sun the top of the liquid runs warmer than the bottom, and the limit applies to all of it.
• Rating: a specific gravity of 1.9, with 79,230 pounds given as the maximum contents against 41,700 pounds of water. Those are the figures to quote to whoever signs off the installation.

Two disciplines carry a tank this tall. The first is loading nothing onto the shell. Pipework, valves, gauges, ladders and sunshades all stand on their own steel, with a flexible connector at the first joint, because a rigid line bolted between a pump and a wall eighteen feet tall is a lever. The second is keeping the containment space honest. It is there for what the inner tank does not hold, which means it is not a place to run conduit, not somewhere to drill and not a rainwater sump; keep it clean, keep it dry, look into it on a written schedule, and treat any liquid found in it as the earliest and cheapest warning the installation will ever produce. Level instrumentation goes through the manway rather than through a new penetration, and the reading it gives is worth more than a sight of the shell at this height.

Bulk acid storage where the tank is the berm

Five thousand gallons is tanker-delivery scale, which changes the reason for the second wall: at this size the containment is not about a dribble at a fitting, it is about what happens during a delivery. Where these tanks go: water and wastewater treatment plants holding a bulk supply for a dosing system; mining, minerals and metals processing sites; pulp, paper and board mills; plating, anodising and surface finishing plants; fertilizer, chemical blending and distribution terminals; power and industrial water treatment. In each case the tank is standing outdoors on a pad, a tanker arrives against a schedule, and somebody has to be able to say what happens if a fitting or a hose lets go while it is unloading. A double wall tank answers part of that question and the site plan answers the rest, which is exactly the boundary the compliance walkthrough linked above draws. Two limits, stated plainly and once. This sheet publishes no containment volume, no annulus dimension and no inner tank dimension, so this page does not tell you what fraction of the inner tank the outer shell holds; ask and we will get that figure from Snyder in writing rather than estimate it for you. And the published service limit is 120 F / 48 C, for the liquid and for the tank, which rules out anything arriving above it. Beyond that, the failures at this scale are all installation failures: a pad that settled, a rigid line to a pump, a vent nobody checked, or an unloading procedure written after the first incident instead of before it.

An oversize load out of Lincoln at 4,300 pounds

This tank is molded at Lincoln, Nebraska and it moves as an oversize load: the sheet gives class OVS on NMFC 156600, shipping at 216 inches long by 102 inches wide by 102 inches high at 4,300 pounds. Eighteen feet of shell on an eight and a half foot base is not a normal trailer load, and that has consequences worth planning for rather than discovering. The freight cost estimator prices the lane to your ZIP, and the listed price is before freight. Tell us at order what the approach to the site is: gate width, overhead lines, turning room, the surface the truck stands on, and what equipment will lift 4,300 pounds of tank eighteen feet long off a trailer and stand it upright. That last step is the one that gets underestimated; a tank this size is placed with a crane or a large telehandler, on a day booked in advance, with the pad cured and the anchor detail already in place. Do not accept delivery onto ground you intend to pour later. Inspect the whole outer shell, the base ring and the manway with the rigging crew while it is still horizontal, because that is the last time anybody will see the bottom half of it closely. Then water-test it standing: fill the inner tank, hold it, walk the pad and the containment space, and check the pad for settlement before a drop of product arrives. The tank that gets set once, on cured concrete, by people who knew its weight before the truck rolled in, is the tank you never think about again. Write the fill date on the manway with a paint marker; it answers the first question anyone asks about a tank.