Snyder Industries 4100 Gallon XLPE Vertical Chemical Storage Tank in White, 1.5 S.G.

What cross-linking buys at 4,100 gallons

Linear polyethylene softens with heat and creeps under sustained load; cross-linked polyethylene is molded with a catalyst that ties the polymer chains into one network, so it holds its shape under a dense liquid, resists the stress cracking oxidizers cause, and tolerates heat, which is where the higher service limit comes from. The trade is that it cannot be plastic-welded, so any added port is a bulkhead through a drilled hole, decided before the tank is filled, and 1,100 pounds of resin is 250 more than the linear tanks in this shell. What follows is the chemistry the resin is rated to hold; check the liquid at its concentration in the chemical compatibility database, since a wall rated for the weight is not the same as a wall rated for the chemistry. A single wall tank of regulated chemical needs a berm sized to its volume; the Snyder Captor 110 percent containment comparison covers when a double wall tank is the cleaner answer than a basin. The tank sizing calculator works the volume out from feed rate and delivery interval, and the tank sizing guide covers the reserve; hypochlorite is sized for short turnover, because it loses strength with every warm week in the tank.

Resins on the 102 x 130 inch tank, and the sizes beside it

The N42 is the cross-linked 1.9 wall at this tank's weight for the densest oxidizers. The C34, C37-BLACK and N46 are the linear tanks in this shell, 250 pounds lighter, for chemicals that do not attack a linear wall. The 7421100N40 lays 4,000 gallons of cross-linked resin down to 104 inches on a 120 inch base for a low roof, and the 7421100C34 is the general 4,300 in that shape.

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.

Openings, sampling and labels

• Access: 18 inch threaded, vented manway, 130 inches up; vent outside on hypochlorite and acid service, dip tube on the fill, vent sized to the tanker's unload rate.
• Outlet: 3 inch; a flanged transition, an expansion joint, and a valve supported off the slab; decide any added port before the tank is filled, because XLPE cannot be welded.
• Service limit: 140 F / 60 C.

Three practices make a bulk hypochlorite tank a safe one. Choose the level sender for the chemical with the level gauge selection guide; hypochlorite is hard on wetted parts, and a sender read at ground level keeps everyone off the platform. Draw samples that represent the tank and not its stratified top, per the bulk tank chemical sampling protocol. And label it so the fire inspector and the workplace inspector read the same thing, NFPA 704 diamond and GHS pictograms reconciled as the tank label and signage compliance guide describes. Full, the tank loads a 102 inch circle to 51,291 pounds at the rating: an engineered slab in full contact under the whole floor, inside a berm, with the empty tank strapped against wind and the tank shaded where the site allows.

The tanker unload

A tanker's pump moves liquid faster than a manway vent can pass air, so either the vent is sized to the unload rate or the fill comes in through its own top bulkhead with a separate vent line. A fill pipe to the floor keeps the liquid from free-falling and foaming. The first delivery into a new tank is watched from start to finish, with the slab edge and the outlet fitting checked as the level climbs; after that, a dated log of each delivery and its strength is what turns a guess about turnover into a schedule.

Day-to-day duty

Hypochlorite bulk storage at water plants with a berm, oxidizer and warm process liquid storage at industrial sites, and any 4,100 gallon vessel where the chemical would finish a linear wall in a few seasons. Label it for the fire inspector and the workplace inspector at once, keep one chemical in it, and keep the manway closed.

Chemicals this resin is rated for, with the fitting and gasket to order

These are the chemicals listed for this tank at the concentrations shown. Each links to the full compatibility page; confirm your exact concentration and temperature there or in the chemical compatibility database before ordering.

• details )
• Aluminum Sulfate at 50% (PVC, EPDM)
• Calcium Chloride at 40% (PVC, EPDM)
• DEF at 32.5% (316SS fittings, EPDM)
• Ferrous Sulfate at 20% (PVC, EPDM)
• Magnesium Chloride at 30% (PVC, EPDM)
• Sodium Carbonate at 30% (PVC, EPDM)
• Urea Solution at 50% (PP/PVC, EPDM), and Ozonated Water up to 10 PPM (PVC, EPDM).One callout for the DEF crowd: diesel exhaust fluid (32.5% urea) is the
• Ethylene Glycol
• Ferric Chloride
• Ferric Sulfate
• Hydrofluosilicic Acid
• Polyaluminum Chloride
• Potassium Carbonate
• Potassium Hydroxide
• Propylene Glycol and
• Sodium Thiosulfate.Hydrofluosilicic acid is the exception within the exception: it needs both the 1.5 S.G.tank AND Viton gaskets rather than EPDM - two upg

From the plant to your site

At 102 inches across and 130 inches long on the deck the 7360000N40 is oversize freight on a flatbed at a lane rate; the freight cost estimator quotes the haul to your ZIP; what is listed is the price before freight. A forklift with long forks or a small crane sets 1,100 pounds on the slab. Water-fill it once to the manway, hold it, and confirm the outlet and manway are dry before the first chemical goes in. Write the fill date on the manway with a paint marker; it answers the first question anyone asks about a tank.