Snyder Industries 2000 Gallon XLPE Vertical Liquid Storage Tank with ASTM Certification

What cross-linking buys, laid low

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. 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. The wall is sized under ASTM D1998; the HDPE tank wall thickness guide explains that logic and why the headspace, where hypochlorite vapor does its work, is where a wall ages, and the freeboard sizing guide works out the usable volume once thermal expansion is accounted for. Two thousand gallons of fill or pump-out moves a lot of air, so the vent is sized for those rates; the atmospheric vent capacity guide does the API 2000 sizing math. Full, it puts 31,692 pounds on a 96 inch circle at the rating, which a slab in full contact carries. The tank sizing calculator sizes the tank to feed rate and delivery interval, and the tank sizing guide covers the reserve, which for hypochlorite is sized for short turnover.

Resins on the 96 x 84 inch tank, and the sizes beside it

The N45, N43 and N39 are the certified linear tanks in this same shell at 1.9, 1.5 and 1.35 specific gravity, for chemicals that do not attack a linear wall, at a lower price. The 1780200N40 is the other cross-linked tank at this volume, 1,900 gallons on a 72 inch base at 119 inches for a narrow corner, and the 5090000C26 is the general 2,500 on a 90 inch base.

Comparing against another maker? Send the competing spec to 866-418-1777 or a quote request and we will show the differences honestly.

Where the pipe goes

• Access: 18 inch threaded, vented manway; vent outside on hypochlorite and acid service, fill through a dip tube, and size the vent for a delivery truck's unload rate.
• Outlet: specify the bulkhead fitting for the chemical when ordering, and decide any added port before the tank is filled, because XLPE cannot be welded; flex between the bulkhead and hard pipe, and a valve braced off the pad so the fitting carries no pipe weight.
• Service limit: 120 F / 48 C.

Hypochlorite is hard on wetted parts, so the level sender is chosen for the chemical; a low-level float switch keeps the pump from running dry. Shade the tank; hypochlorite degrades with heat and time, so it is bought at short turnover. Set the dosing pump lower than the outlet so gravity primes it, and keep the manway closed against vapor loss. Regulated chemical in a single wall tank means a berm sized to the tank around it.

The work it does

Hypochlorite bulk storage at a small water plant with a berm and a low roof, acid and warm process liquids at 2,000 gallon scale, and any vessel where the chemical would finish a linear wall in a few seasons. With water in it, a well buffer or a cell of the small fire reserve the fire-water reservoir design guide describes, though a tank bought in this resin is bought for chemical. One chemical per tank, labeled.

Freight, in plain terms

At 96 inches across the 5050300N42 ships as oversize freight (NMFC 93662) on a flatbed at a lane rate; the freight cost estimator prices the lane to your ZIP; the figure listed here is before freight. A forklift with long forks sets 420 pounds on the pad. Water-fill it once to the manway, hold it, and confirm the outlet and manway are dry before the first chemical goes in. Save the pallet; a tank that ever has to move again is easier to move on it.