Snyder Industries 405 Gallon ASTM XLPE Double Wall Tank

Standing a 48 inch base indoors without building a bund

Begin with the position, because 405 gallons is the capacity at which the choice between a contained tank and a constructed bund stops being obvious. The base here is 48 inches square, four feet each way, and the tank stands 73 inches to the top of the manway, so the whole installation occupies sixteen square feet of floor and clears most internal roller shutters standing upright. Set against that, building a bund for a single wall vessel of the same volume means kerbs, a coating specification, a drainage detail, a volume calculation and a floor you are no longer free to reconfigure. This tank brings its containment with it and takes it away again if the line moves. That is the honest comparison, and at this size it usually settles the argument on its own. The surface under it has to be right regardless. Flat, continuous, level and carrying the whole 48 inch footprint, with no rocking and nothing packed under a corner; above it sits 3,378 pounds of water and 6,418 pounds at the published 1.9 rating, which is a serious load on sixteen square feet and worth confirming against the slab rather than assuming. Access is the other thing to settle on the drawing. At 73 inches the manway is above head height for most people, so a step or a short platform is part of the installation, and the sensible arrangement is to bring the delivery coupling down to working level so a driver never climbs. Leave a walking route right round the tank while you are at it; the side nobody can reach is the side that never gets inspected. Two engineering references belong here. The hardest service a polyethylene wall sees is at the vapour line rather than under the liquid, which the wall thickness at the vapour saturated headspace guide works through, and it explains why an inspection from the liquid side gives you false comfort. Where somebody wants to know how the space between two walls is tested, the cathodic disbondment testing guide for double wall interstitial spaces sets out that methodology and where the polyethylene boundary lies; this vessel is polyethylene and stands above ground, and nothing on this page claims otherwise. Then size it honestly: the usable volume and the real headspace are not the nameplate figure, which the double wall freeboard sizing guide covers, and your delivery quantity and turnover belong in the tank sizing calculator alongside the freeboard discipline in the tank sizing guide.

Three more 405s, a 360 and a 500

Four listings sit on this identical 48 by 48 by 73 inch shell at the same 250 pounds and differ on paper only in the name and the colour the maker assigns: two named as cross-linked with one of those black, one named black, and one named for sodium hypochlorite. The sheet explains none of it and this page will not guess, because a product name is not a specification. Describe the product, the strength and the service and we will name the part number. The thing to notice about the other two rows is how little of the difference is volume and how much of it is proportion. 5760102N30 holds 360 gallons, only forty-five fewer than this tank, but does it on a 53 inch plan at just 63 inches tall and the same 250 pounds: five inches wider in each direction on the floor buys you ten inches of clearance overhead and a manway a person can see into from a single step. 5780102N42 holds 500 gallons on that same 53 inch plan by going up to 81 inches at 290 pounds, which is the option when the floor is spoken for and the roof is not. This tank sits between them and that is precisely its argument: the narrowest plan of the three, at a height that still fits under most industrial ceilings. Choose on the dimension your building is short of, not on the gallon figure, and check the door on the route as carefully as the destination.

Picked the 405 gallon tank? Add it to your cart above; freight is quoted to your ZIP before you pay anything.

Eighteen inches of manway over a 73 inch shell

• The outlet field: it reads "1 Manway / Lid", the name of an opening rather than a pipe size, and the inlet field is blank. This sheet publishes no outlet dimension, no thread, no bulkhead, no flange and no valve, so none is claimed on this page. Tell us the line size, the valve type, the pump and the product, and we will confirm what this part number carries before anything is ordered.
• The manway: 18 inches, threaded and vented, and the only opening published. It is the fill route, the inspection route and the cleaning route at once, and 18 inches is wide enough to get a real look at the wall and to work a lance properly.
• Reaching it: the top is at 73 inches, above head height. Design the step or platform with the tank rather than after it, and bring the fill connection down to working level so a delivery does not depend on somebody climbing.
• The vent: the manway is listed as vented, and that path is what protects the wall while a delivery pushes air out and while a pump draws the level down. Keep it clear, inspect it whenever the manway is open, and never blank it.
• The space between the walls: no monitoring port, gauge or alarm is published. How that space is watched and recorded is specified separately; at this volume it is worth a written procedure rather than a habit.
• Structure: the sheet publishes no lifting lugs, no ladder lugs and no flange lines on this part number.
• Limits: 140 F / 60 C, a specific gravity rating of 1.9, and a 3 Year Warranty.

Name the product and its strength when you order. The second wall does nothing for a fitting that was specified generically, and the fitting is where a release starts on a vessel like this.

Process lines between a tote and a bulk delivery

Four hundred and five gallons is the awkward middle that a lot of plants live in: too much to keep running on totes handled by forklift, not enough to justify a bulk vessel in the yard with a pipe run back to the building. This shape answers that directly. It takes a hose delivery, it stands where the product is used, and it brings its own containment to a floor that was never designed for a bund. The duties follow from that: coagulant and polymer make-up at a water or wastewater works, clean-in-place and sanitising chemical storage in food, beverage and dairy, a cooling tower or boiler house treatment station, plating and surface finishing lines, pulp and paper additive feed, and pilot or small-batch production that changes product between campaigns. Natural white is part of the argument too, because on a tank whose only opening is at 73 inches, being able to read the level through the wall from across the bay saves an operator a climb every shift. Agree the receiving procedure when you buy the tank, not on the first delivery: where the driver connects, who watches the fill, and what the stop level is.

Chowchilla, California, at 250 pounds

Chowchilla, California is the only plant on this sheet and California the only ship-from state, which makes the West Coast and the Southwest the short lanes and everything east of the mountains a planned move. Freight is LTL at class 250 with no NMFC number listed, and the shipping size is given at 48 by 48 by 73 inches at 250 pounds. Price the lane to your own ZIP with the freight cost estimator before you fix the capacity; the listed price is before freight. This is a single pallet position at a weight a pallet truck handles, so the equipment at your end is modest, but the shipment is both four feet wide and over six feet tall, which is the combination that finds a low lintel. Walk the route, measure the narrowest point and the lowest point, and move it upright wherever the building allows rather than laying it down and standing it up in a confined space. Take it under the base, never by the manway. Set it on the finished, cured, level surface in its final position, confirm it is plumb in two directions, and only then connect anything. Fill it with clean water, hold that 3,378 pound load and read the manway seal, the base and the slab under it. Drain it, dry it, open the space between the walls and record what you saw and when on the shell. Keep a spare lid seal on the shelf from day one; it is the part that is never available on the day it is needed. Keep the delivery paperwork with the tank; the serial number on the shell is what a warranty claim starts from.