Snyder Industries 4100 Gallon ASTM XLPE Black Heavy Duty Vertical Storage Tank

The heavy wall in the 7360000 mold

Start with the mold, because that is what you are actually choosing. Four listings come out of this 102 by 102 by 130 inch shell, and this is the one whose sheet says 1.9 and whose handling weight is 1,100 pounds against the 850 pound moldings beside it. The extra weight is the extra wall, and the extra wall is the whole product: 64,969 pounds of allowed contents is what a brine, a concentrate or a dense process solution asks for, and it is what a liquid near 8.34 pounds per gallon will never ask for. So the rule is short. Dense liquid, take this listing. Light liquid, take the 7360000N46 in this identical shell at 850 pounds and rated as its own sheet says, and spend the difference on the platform you are going to need anyway. Nothing else separates them: the circle, the height, the 18 inch opening, the plant and the freight class are the same, and the sheet gives the rating and the weight as the two honest differences. The shape is the second half of the decision and it is a compromise by design. An eight and a half foot circle is narrower than the 120 inch tanks at this volume, so it goes into a chemical alley or against a wall where a ten foot base would block the aisle, and at 130 inches it is a little under eleven feet to the manway, which is platform height rather than step height and needs a roof line with room above it for a fill line and a vent. Below, plain water is 34,194 pounds and the rating allows 64,969, all of it borne on the full 102 inch circle because a rotationally molded floor carries on its whole floor and on nothing else. That is a heavier 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. Nearly eleven feet of empty shell weighing 1,100 pounds on that base is wind-sensitive, so band it to structure or slab anchors the day it lands, check the tension 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 keeps light out of the liquid and takes the ultraviolet that ages a pale shell outdoors; it also hides the level, so a sender read at the ground is the gauge. Run 4,100 gallons against the draw between deliveries in the tank sizing calculator, and take the reserve and the warm-weather freeboard from the tank sizing guide.

The 102 inch family against the 120 inch ones

Read the empty-weight column first and the family reads itself: one 1,100 pound molding and three 850 pound moldings out of the same 102 by 130 inch shell, each rated as its own sheet says. This is the 1,100 pound one, and nobody should buy it for a liquid that the lighter moldings already hold. The two 7421100 tanks in the table are the other way to solve this volume, a 120 inch circle stopping at 104 inches: the N40 at 4,000 gallons and 810 pounds and the C34 at 4,300 gallons and 850 pounds, both low enough to open from a step and both wanting a foot and a half more floor than this shell does. That is the real trade in this band. A 102 inch base buys back aisle and costs you overhead room and a platform; a 120 inch base buys back headroom and costs you slab. Where the liquid is demanding rather than simply heavy, the crosslinking and chemistry duty article is the place to read why a crosslinked wall behaves differently from a plain one before the rating gets argued about.

Ready to choose a row? Add the 4100 gallon tank to your cart above with freight quoted to your ZIP, or 866-418-1777 will confirm it against the site first.

Vent, fill, and an outlet field that reads 23

• Vent first, because it is the fitting that decides whether the shell or the atmosphere absorbs a fast delivery: size it to the delivery pump rather than to whichever port is nearest, pipe it outdoors on anything that fumes, and keep the screen on the maintenance schedule rather than in a drawer. A 102 inch circle has a small liquid surface for 4,100 gallons, so the air moves through that opening quickly at the end of a fill.
• Fill and headspace: land the fill on a permanent connection at the 18 inch threaded, vented manway instead of a hose lifted eleven feet overhead, run a dip tube to the floor so the stream does not free-fall the full 130 inches and aerate a dense liquid on the way down, and keep the warm-weather freeboard the sizing guide gives, because the level climbs fast on a narrow shell and the last minute of a delivery has little forgiveness in it.
• Outlet: the sheet lists the outlet as 23. It prints with no unit, no material and no thread beside it, so the field is reproduced here exactly as it stands and is not read as a pipe diameter; no bulkhead size is claimed for this tank on this page. Name the liquid and the draw-off you need at order and we confirm what this molding accepts, in what material, with what gasket, before anything is drilled.
• Listed structure: 8 lifting lugs, ladder lugs, 2 flange lines. Service limit 140 F / 60 C. Warranty 3 year. Rating: specific gravity 1.9 as this sheet gives it.

Access is the cost of the height. A manway at 130 inches is overhead work, so the fixed platform with a rail and a gate, or a tied-off platform ladder, gets designed with the pad and not two budget cycles later; the ladder lugs on the sheet exist so the access can be made permanent rather than improvised. Almost eleven feet of standing liquid is worth having at the base: a transfer pump set below the outlet runs flooded far into the tank, and a low-level float stops it before it draws air. The same head puts real static pressure on whatever is fitted down there, which is why it sits on its own support off the pad with a flexible connector between the shell and hard pipe, and why the 8 lifting lugs are for standing the tank up rather than for hanging pipework from. Keep the manway threaded shut between deliveries, put the name of the one liquid 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 the site freezes, trace and insulate the base piping and the first valve and leave the body alone.

Appalachian plants that dose a dense liquid

A West Virginia plant is a short lane from this one, and the duties follow the shape as much as the map: a treatment building storing a brine or concentrate in a narrow chemical room, a dosing skid that needs 4,100 gallons of dense solution beside equipment that is not moving, a mine or quarry water treatment set-up on a constrained pad, 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. The common condition is a long, thin room with height in it, which is the room a 102 inch circle was molded for. Plain water at 8.34 pounds per gallon sits far inside the 1.9 rating, but a private fire reserve is a separate specification in a water-rated vessel rather than a tank picked off a shelf, and the fire-water reservoir design guide sets out why the two are not interchangeable at any size.

Philippi, West Virginia, class 300, 1,100 pounds

The sheet gives class 300 and 1,100 pounds shipping weight from Philippi, West Virginia, which puts the Mid-Atlantic and the Ohio Valley on a short lane and makes anything west of the Mississippi worth quoting rather than assuming. At 102 inches across and 130 inches long on the deck it rides as a permitted load, and class 300 on 1,100 pounds is the freight system pricing the space the parcel takes as much as the scale reading; price the lane to your ZIP in the freight cost estimator before the requisition goes in, and the listed price is before freight. A crane or a forklift stands it up with straps under the body and the 8 lifting lugs the sheet lists, never a sling through the manway, and it sets on the cured pad rather than on gravel it will have to be dragged off later. Fill it with water to the manway, hold it, and walk the base and the pad edge twice while it holds, then drain and dry before the working liquid arrives. Get the platform built before the first delivery, not after it; the tank you cannot safely open is the tank nobody inspects. Leave room to walk all the way around it; the side of the tank nobody can see is the side that leaks.