Snyder Industries 3900 Gallon ASTM XLPE Black Heavy Duty Vertical Storage Tank

The 1.9 listing in the 5190000 shell, and its three flange lines

Four listings come out of this 90 by 90 by 163 inch mold and the sheet separates this one twice. It rates the wall for 1.9, and it gives the empty weight as 1,200 pounds where its three shell-mates are listed at 900; the sheet gives both figures and we print what it says. That weight is the wall, and the wall is why anyone specifies this part number instead of a lighter one: 61,799 pounds of allowed contents is what a brine, a concentrate or a dense process solution asks for, and it is a figure a liquid near 8.34 pounds per gallon will never test. On a light duty the 5190000N46 or the 5190000N40 in this same shell, rated as their own sheets say, hold the same 3,900 gallons on the same slab and under the same platform for less wall. The second thing that sets this listing apart is the structural field: 3 flange lines, where the other moldings in this slice list one or two. It is printed here because the sheet prints it, and it is not read as a fitting schedule. What the whole family shares is a shape for a room that is long and thin and tall. A 90 inch circle is seven and a half feet of floor, so this tank sets against a wall or into the gap between two vessels already standing, and at 163 inches it is over thirteen feet to the manway, which means the roof line and everything hanging off it get measured before the requisition goes in: a fill line and a vent want room above the opening and a sprinkler head is not negotiable. Below it, plain water is 32,526 pounds on that circle and the rating allows 61,799, all of it borne on the full floor because a rotationally molded floor carries on its whole floor. That is a heavier bearing pressure per square foot than a squat tank at the same volume puts down, so the slab is engineered to the concrete pad sizing guide rather than poured by rule of thumb, level, in full contact, inside a berm sized to the tank where the liquid is regulated. The 4 tiedown lugs the sheet lists are there to be used, because thirteen and a half feet of empty shell at 1,200 pounds on a narrow base is what a gust moves: band it the day it lands, check it after the first windy week, and check it again at the end of the first hot summer, because a black wall grows a little in the sun every day. Black passes no light into the liquid and takes the ultraviolet that ages a pale shell, and it hides the level, so a sender read at the ground is the gauge. Take 3,900 gallons to the tank sizing calculator against your feed rate and delivery interval, and read the reserve and the warm-weather freeboard out of the tank sizing guide.

The 5190000 mold, and the 3,650 beside it

One molding at 1,200 pounds and three at 900, all of them 3,900 gallons in the same 90 by 163 inch shell, each rated as its own sheet says. This is the 1,200 pound one, and the case for it is density and nothing else; the 5190000N46, N40 and N49 are the lighter moldings and the right buy whenever the liquid does not load a heavy wall. Look sideways and the trade becomes shape. The 8190000C26 holds 3,650 gallons in a 102 inch circle 126 inches tall at 790 pounds, and the 7421100N40 holds 4,000 gallons in a 120 inch circle only 104 inches tall at 810 pounds, which is the lowest and widest answer in the band and the one that opens from a short ladder. Every step from this tank toward those two buys headroom and spends floor. Where the liquid is chemically demanding as well as heavy, the crosslinking and chemistry duty article explains what a crosslinked wall does that a plain one does not, and it is worth reading before the rating argument starts.

Picked the 3900 gallon tank? Add it to your cart above; freight is quoted to your ZIP before you pay anything.

Three flange lines, one vented manway, and the vent that matters

• Vent: sized to the delivery pump rather than to the port that happens to be nearest. A 90 inch shell has a small liquid surface for 3,900 gallons, so the level climbs fast and the air leaves fast at the end of a fill; pipe it outdoors on anything that fumes, screen it, and keep the screen on the maintenance schedule, because a blocked vent under a dense liquid is the failure this shape invites.
• Fill and headspace: land the fill on a permanent connection at the 18 inch threaded, vented manway so nobody handles a hose thirteen feet overhead, run a dip tube to the floor so the stream does not free-fall the full 163 inches and aerate a dense liquid on the way down, and keep the warm-weather freeboard the sizing guide gives, with the high-level cutout in the install and not in a later budget.
• Outlet: the sheet lists the outlet as 12. It prints with no unit, no material and no thread beside it, so the field is reproduced here as it stands and is not read as a pipe diameter; no bulkhead size is claimed for this tank on this page. Tell us the liquid and the draw-off you want at order and we confirm what this molding accepts, in what material, with what gasket, before anything is drilled.
• Listed structure: 4 tiedown lugs, 8 lifting lugs, ladder lugs, 3 flange lines. Service limit 140 F / 60 C. Warranty 3 year. Rating: specific gravity 1.9 as the sheet gives it.

Thirteen and a half feet of standing liquid is the best thing about this tank at the base and the reason the base has to be built properly. A transfer pump set below the outlet runs flooded far into the tank and the last inches drain faster than they do on a squat shell, with a low-level float to stop it before it draws air. The same head puts real static pressure on whatever is fitted down there, so it sits on its own support off the pad with a flexible connector between the shell and hard pipe, and the 8 lifting lugs the sheet lists are for standing the tank up rather than for carrying pipework. Access is the other design item: a manway at 163 inches is overhead work, so the fixed platform with a rail and a gate, or a tied-off platform ladder, gets drawn with the pad, and the ladder lugs exist so that access is permanent. Keep the manway threaded shut between deliveries, put the one liquid's name on the wall where a driver reads it from the cab, and take a light to the band above the liquid line every time the cover comes off. Where winters bite, the trace heat and the insulation go on the base piping and the first valve and never on the body.

Dense liquid where the floor is 90 inches wide

The buyers are the sites with air and no floor: a treatment plant storing a brine or concentrate in a chemical alley, a dosing skid that needs 3,900 gallons of dense solution beside equipment that is not moving, an ethanol or grain plant with a process solution and a fixed aisle, a co-op holding a heavy feed or fertilizer solution out of the light, and a finishing shop with a bath feed tank against a wall. Where a site rule or an insurer wants the liquid inside a second wall, the double wall freeboard sizing guide works out how much usable volume a contained vessel really returns at this size, which is never the figure on the label. Plain water at 8.34 pounds per gallon is far inside the 1.9 rating, but a private fire reserve is a separate specification in a water-rated vessel, and the fire-water reservoir design guide says plainly why one does not substitute for the other.

Lincoln, Nebraska, class 300, 1,200 pounds on the deck

The sheet gives class 300 and 1,200 pounds shipping weight from Lincoln, Nebraska, which puts the middle of the country on a short lane and makes either coast worth quoting rather than assuming. At 90 inches across and 163 inches long on the deck it rides as a permitted load, and class 300 on 1,200 pounds is the freight system pricing the space the parcel occupies as much as the scale; price the lane to your ZIP in the freight cost estimator before the order is cut, and the listed price is before freight. A crane stands it up with straps under the body and the 8 lifting lugs the sheet lists, never a sling through the manway, and the 4 tiedowns go on before the lifting gear leaves the site, because a thirteen foot empty shell is not a thing to leave unbanded for a week. Fill it with water to the manway, hold it, walk the base and the pad edge twice, then drain and dry before the working liquid arrives. Stencil the part number on the shell itself before the platform goes up, because four moldings come out of this mold and the label on the side is the only one still readable in five years. Keep the delivery paperwork with the tank; the serial number on the shell is what a warranty claim starts from.