Snyder Industries 8750 Gallon ASTM XLPE Black Vertical Storage Tank

Why the 1.5 wall is the right buy in this wide shell

Four moldings share this shell and the sheet prices them by the pound of wall: the 5360100N48 and 5360100N42 are listed at 2,400 pounds empty, this tank and the 5360100N40 at 2,000. Everything else on the four sheets is identical, down to the 8,750 gallons, the 142 inch circle, the 146 inches of height, the manway, the plant and the freight class. So the only honest question is the liquid. At 1.5 this sheet allows 109,462 pounds of contents against 72,975 pounds for plain water in the same vessel, and that band covers most of what actually gets stored at this volume: water, process and wash water, brines, dilute solutions, reclaimed streams, the lighter end of a fertilizer product line. For those liquids, the heavy walls in this shell are wall you would pay for and never load. Against the 5360100N40 at the same 2,000 pounds, the difference is colour rather than rating: black passes no light into the liquid, which is what you want over a nutrient-bearing or reclaimed stream where algae is the failure mode, and it costs you the ability to read the level through the wall, so a sender and a local readout are part of the install. What the shape asks for is pad. Twelve feet two inches of height is low enough for a shed roof or a pipe rack, and the eleven foot ten inch circle underneath carries every pound of contents, because a rotationally molded floor bears on its whole floor and on nothing else. Engineer the slab to the concrete pad sizing guide, level, flat and in full contact, inside a berm sized to the tank where the liquid is regulated, and band the empty shell to structure or slab anchors before the first delivery even though a low tank is the least wind-sensitive shape here. Take 8,750 gallons to the tank sizing calculator against the draw and the delivery interval, and the reserve and the warm-weather freeboard to the tank sizing guide.

Three walls in one 146 inch shell, at two weights

The four 5360100 tanks are one vessel with four walls, each rated as its own sheet says, and the empty weight is the visible part of the difference; this is the lighter black one. The comparison that actually decides a purchase, though, is the bottom two rows. The 7400000 tanks put roughly the same liquid on a 120 inch circle at 194 inches tall, sixteen feet two inches, which is a small pad and a tall bay; this tank is a wide pad and no height at all. Measure the building before you choose the wall, because a rating can be changed on the order and a roof cannot. Where a low tank wins outright is the routine afterwards: the manway is reached from a short platform, the tank does not need the strapping design a tower does, and nobody schedules a stair tower to take a sample.

Still deciding between these? Freight to your ZIP often settles it; the wider tanks ship differently. Or call 866-418-1777 and we will walk the table with you.

Fill, vent and the headspace on a low, wide tank

• Vent: the listed opening is an 18 inch threaded, vented manway, and the vent is what lets 8,750 gallons move in or out without the tank arguing about it. Pipe it outdoors on anything that fumes, keep the run clear of paint, nests and ice, size it to the delivery pump rather than to the nearest port, and look at it at every opening.
• Fill: land a permanent fill line at the manway rather than lifting a hose, and run a dip tube to the floor so the incoming stream does not free-fall twelve feet two inches and foam. On a wide tank the fill lands on a large liquid surface, which is a real advantage on anything that entrains air.
• Headspace: a low, wide shell has more wall above the liquid line per gallon than a tower does, it cannot be seen through a black wall, and it is where most chemistries work hardest, so it gets a light at every opening.
• Outlet: the sheet lists the outlet as 28 and gives no pipe size anywhere. We print the field as it stands rather than read a bare number as a diameter. Name the liquid and the draw-off you need at order and we confirm what this molding accepts, in what material, before anything is drilled.
• Access: a ladder lug and two flange lines, as the sheet lists them.
• Service limit: 140 F / 60 C. Warranty: 3 year. Rating: specific gravity 1.5 as the sheet gives it.

Because the column is short, the pump arrangement matters more here than on a tower. Mount the transfer pump below the outlet so gravity keeps it primed, fit a low-level float so it stops before it draws air, and expect the last few inches to come out slowly rather than fast. Whatever is plumbed at the base is carried on its own support off the pad with a flexible connector between the shell and hard pipe, because a rigid run bolted to the wall feeds thermal movement and vibration straight into it. Keep the manway threaded shut between deliveries so vapour stays in and rain stays out, put the one liquid's name on the wall where a driver reads it from the cab, and in a freezing climate protect the valve and the first pipe run rather than the body.

Reclaimed water, light solutions and shed-roof sites

The 1.5 wall in a low black shell is bulk storage for the ordinary cases: process and wash water at a plant, a brine or dilute solution at a food or chemical works, the lighter products at a fertilizer dealer, mine and quarry site water, stormwater or reclaimed water held in the dark so nothing grows in it, and irrigation or nursery supply under a shed roof. Plain water at 8.34 pounds per gallon is far inside the rating, but a private fire reserve is a separate specification in a water-rated vessel, and the fire-water reservoir design guide sets out what that specification asks for, including the freeze-protection work that gets skipped. Where a reuse system needs a large dark holding stage between treatment steps, the industrial water reuse tank topology article places a vessel this size and shape in the sequence, which is the useful reading if this tank is one stage of several rather than the whole system.

2,000 pounds out of Lincoln, and the pad that receives it

Class 300 and 2,000 pounds shipping weight from Lincoln, Nebraska is what the sheet gives, and 2,000 pounds is the lightest thing in this batch to handle. The complication is width: at 142 inches across the shell is wider than a trailer and moves as a permitted load on an open deck, so the lane is priced rather than guessed. Put your ZIP into the freight cost estimator before the order is cut and treat the listed price as before freight. A large forklift with long forks or a small crane sets it down, straps under the body and never a sling through the manway, onto the finished pad rather than a staging slab. Then water: fill to the manway, hold it, walk the base and the rim twice looking for a gap where the shell meets the slab, then drain and dry before the working liquid arrives. Keep the pallet or the dunnage it arrived on, because a wide shell that ever has to move again moves far more easily on it than off it. Write the outlet fitting size and material on the site plan; the replacement is ordered by those two words.