Snyder Industries 4400 Gallon ASTM XLPE Black Heavy Duty Vertical Storage Tank

Why the N48 listing and not the lighter walls in this shell

Four part numbers share this 90 by 90 by 182 inch mold and they do not share a sheet. This one says 1.9, and it is also the heavy end of the shell by handling weight at 1,450 pounds against the 1,100 pound listings beside it, which is the honest signal that you are buying more wall rather than a different label. The decision is a density decision and nothing else. A brine, a concentrate, a dense process solution, anything that weighs meaningfully more than water per gallon, is what 69,722 pounds of allowed contents is for; on rinse water or a feed solution at or near 8.34 pounds per gallon that rating is duty you will never call on, and the lighter-rated tank in this identical shell is the cheaper answer. A rating is a limit and not a suggestion, and the fastest way past one is a substitution nobody wrote down, so whichever listing you take, the liquid goes on the wall and the delivery log records what arrived. What you inherit with the rating is the shape. Fifteen feet two inches of shell on a seven and a half foot base is the narrowest way in this range to stand 4,400 gallons up, which is why it fits a chemical alley or the gap between two vessels already in place, and why the roof line decides the order: the manway is at 182 inches and the fill and vent lines want room above that, so the purlin, the sprinkler head and the light fixture get measured before the requisition. Underneath, plain water is 36,696 pounds on a 90 inch circle and the rating allows 69,722, all of it borne on the full floor because a rotationally molded floor carries on its whole floor and on nothing else. That is a higher 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. Strapping is a design item on this shape, not an afterthought: the sheet lists 4 tiedown lugs, and they are there to be used the day the tank lands, checked after the first storm and again at the end of the first hot summer, because a black wall in the sun grows a little every day and the band that was tight in spring is loose by August. Black keeps light out of the liquid and takes the ultraviolet off a pale shell outdoors; it also hides the level, so a sender read at the ground is the gauge. Check 4,400 gallons against the draw between deliveries in the tank sizing calculator, and take the reserve and the thermal freeboard from the tank sizing guide.

The 5210000 shell at two handling weights

Read the table down the empty-weight column and the family makes sense. Two of these listings are 1,450 pound moldings and two are 1,100 pound moldings in the same 90 by 182 inch shape, each rated as its own sheet says, so the weight column is a better guide to what you are buying than the suffix is. This is a 1,450 pound listing rated 1.9, and it is the one to take when the liquid is dense and the footprint is fixed. The 5210000N46 is the lighter molding in this same shell and is the tank to compare against on a liquid near water weight, because there is no reason to pay for wall a light liquid cannot load. Turn the problem around and the two neighbours answer a different room. The 7421100C34 lays 4,300 gallons down to 104 inches on a 120 inch base at 850 pounds, and the 7000400N29 spreads 4,500 gallons across a 143 inch circle only 91 inches tall at 900 pounds; both are forklift work and neither needs a platform, and both eat floor this tank does not. Crosslinked wall behaves differently from a plain one under a demanding liquid, which the crosslinking and chemistry duty article works through in detail.

Want the certified one or the plain one? Call 866-418-1777 and say what the inspector asks for; or request a quote on the row you need.

Vent first: 182 inches of shell above the fill point

• Fill and vent, in that order, because a tall shell is where a bad fill shows up: land the fill on a permanent connection at the manway instead of a hose lifted fifteen feet in the dark, run a dip tube to the floor so the stream does not free-fall the full 182 inches and aerate a dense liquid on the way down, pipe the vent outdoors on anything that fumes, and size the vent to the delivery pump rather than to the port that happens to be there. The 18 inch threaded, vented manway is the listed opening and the reference point for all of it.
• Headspace: a narrow shell has a small liquid surface, so the level climbs fast at the end of a fill and there is very little forgiveness in the last minute of a delivery. Leave the warm-weather freeboard the sizing guide gives and put the high-level cutout in the install rather than in a later budget.
• Outlet: the sheet lists the outlet as 14. It prints with no unit, no material and no thread beside it, so it 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, and in what material, before a hole is made in it.
• Structural fields as listed: 4 tiedown lugs, 8 lifting lugs, ladder lugs, 2 flange lines. Service limit 140 F / 60 C. Warranty 3 year. Rating: specific gravity 1.9 as the sheet gives it.

Fifteen feet two inches of standing liquid is the most useful thing about this tank and the thing that punishes lazy plumbing. 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, so the pump goes low and a low-level float stops it before it draws air. The same head puts real static pressure on whatever is fitted at the base, which is why it sits on its own support off the pad with a flexible connector between the shell and hard pipe, and why nothing rigid is bolted straight to the wall: a rigid run feeds every bit of thermal movement and pump vibration back into the shell. The 8 lifting lugs the sheet lists are for standing the tank up, not for hanging pipework off. Keep the manway threaded shut between deliveries, name the one liquid on the wall where a driver reads it from the cab, and put a light on the band above the liquid line each time the cover is off. Where winters bite, trace and insulate the base piping and the first valve and leave the body alone.

Dense liquid in a tall bay with no floor to spare

The buyers are the plants with height and no room: a treatment building storing a brine or concentrate in a chemical alley, a dosing skid that needs 4,400 gallons of dense solution standing beside equipment that is not moving, 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 number on the label. 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, and the fire-water reservoir design guide explains plainly why the two are not interchangeable.

Lincoln, Nebraska, class 300, 1,450 pounds standing up

The sheet gives class 300 and 1,450 pounds shipping weight from Lincoln, Nebraska, which puts most of the middle of the country on a short lane and makes this the lighter of the two classes in this family. At 90 inches across and 182 inches long on the deck it rides as a permitted load rather than an oversize one, and class 300 on 1,450 pounds is the freight system pricing the space the parcel occupies as much as the scale reading; 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 tiedowns go on before the lifting gear leaves the site, because a fifteen foot empty shell is not a thing to leave unstrapped for a week. Then water: fill to the manway, hold it long enough to walk the base and the pad edge twice, drain it, dry it, and only then bring the working liquid. Photograph it full on its pad before the piping goes on; that picture is the baseline every later inspection gets compared against, and nobody ever takes it afterwards. Keep one spare gasket for the outlet fitting on the shelf; it is the part that fails on a holiday.