Snyder Industries 3000 Gallon Vertical Double Wall Liquid Storage Tank in White- WV

The heavy wall with the berm inside

A 1.9 specific gravity wall is sized for a liquid nearly twice as dense as water. A single wall tank of that chemical needs a berm sized to its volume, a concrete basin with a sump and a drain valve that must stay closed; a double wall tank carries its containment inside the outer shell, so the 102 inch footprint is the whole footprint and the tank can stand inside an occupied building where a spill must never reach a floor drain. Work out the usable volume once thermal expansion, which is large for a dense chemical, and the interstice are accounted for with the Captor double wall freeboard sizing guide. The 3,000 gallon vertical tank buyers guide compares the single wall tanks at this volume, the right comparison only if a berm is already in place. The tank sizing calculator sizes the volume to feed rate and delivery interval, and the tank sizing guide covers the reserve.

The grade beside it, and the size below

The 5590100N43 is the 1.5 wall in this same shell at the same weight, for coagulants and brines that never approach this density. The 5570100N45 is the 2,000 gallon double wall in this same grade on this same 102 inch base, 39 inches shorter and 660 pounds lighter, for a lower ceiling.

Other makers in the running? 866-418-1777 will compare them honestly; Norwesco, Snyder, Chem-Tainer, Enduraplas and Bushman are all here, or price freight on this one.

Access, outlet, interstitial port

• Access: 18 inch manway on the primary, 142 inches up; a dip tube for the fill, an outdoor vent on acid and caustic, and vent capacity to match the tanker.
• Outlet: both walls together at one flanged penetration, expansion joint after it, valve supported from the slab; name the chemical when ordering so the fitting matches it.
• Service limit: 120 F / 48 C.

Watch two levels: the primary, with a sender chosen for the chemical, and the interstitial space, which is the leak alarm and gets a float or conductivity switch, a look into the port each shift, and a logged check each week. Liquid in the space means the primary has failed, and the tank is emptied that day. Nothing leans on the outer shell, nothing penetrates it, and the interstice is never a storage space. Full, the tank loads a 102 inch circle to 47,538 pounds at the rating: an engineered slab in full contact under the whole floor, a wind strap on the empty tank, and access to the manway from a fixed platform.

Unloading without a spill

The truck's pump outruns the manway vent, so size the vent for the unload rate or give the fill its own top bulkhead and vent line. Run the fill pipe to the floor so caustic or coagulant does not free-fall and foam. Diluting a dense chemical makes heat, so a batch is built water first and chemical second, never the reverse. The first fill of a new tank is watched end to end: slab edge, outlet fitting and interstitial port, checked as the level comes up, and from then on each load is logged by date and strength.

In service

Ferric, acid and caustic bulk storage at water systems that cannot build a berm, chemical storage inside occupied buildings, and any regulated liquid at plant scale at a site an inspector visits. One chemical per tank; label it once for both inspectors; keep the manway shut so nothing escapes as vapor.

Freight and unloading

At 102 inches across and 142 inches long on the deck the 5590100N45 is oversize freight (NMFC 156600) on a flatbed at a lane rate; the freight cost estimator prices the move to your ZIP, and the price on this page is before freight. A forklift with long forks or a small crane sets 1,840 pounds on the slab. Hold a water test on the primary with the interstitial port watched, then drain and dry ahead of the first chemical. The first fill is the only cheap time to find a problem, so do it in daylight with someone watching the base.