Industry · chemical & industrial
The sector where paperwork is the product.
01 / WHAT THIS SECTOR NEEDS
A container that will survive an inspection
For regulated liquid cargo the marking governs. It states the container type, the packing groups permitted, the date of manufacture or reconditioning, the authorising reconditioner and the maximum permitted gross mass. If any character is unreadable, the mark is not a mark — and the load is not compliant regardless of how sound the container is.
We re-mark to UN 31HA1/Y after leak and, where required, hydrostatic testing under 49 CFR 178.801. Around six per cent of units entering the cell fail, almost always at the valve flange or lid gasket rather than the bottle wall. Those get a new gasket and a retest, not a quiet downgrade.
Where HDPE is the wrong answer
- Ketones and aromatics — crazing, which is a critical grading fail
- Chlorinated solvents — stainless only, no exceptions
- Anything stored over six months with permeation risk
- Pressurised or inert-blanketed service — composite IBCs are atmospheric
- Hydrogen peroxide above about 10% — decomposition and pressure
The full matrix is chapter six of the size guide; the alternative is stainless.
Typical specification
- Capacity275 or 330 gal
- GradeA, re-marked
- Seat materialViton or PTFE
- PalletSteel
- LidVented for fuming cargo
- MarkingUN 31HA1/Y, dated
- Test documentsPer unit
- Dedicated washFrequently specified
The trap we see most
Buying a re-marked tote and never tracking the next test date. Periodic retesting is required at intervals set by regulation — generally a leak test every two and a half years and a full inspection every five. The date on the mark is your clock. Put your fleet on a standing booking and the problem disappears.
“Chemical customers are the easiest to deal with because they tell you exactly what they need. They hand you a spec line. Everybody else hands you a vibe.”Marisol Treviño · Yard Operations Lead, ToteOrbit
02 / ARRANGEMENT
Three common structures
How chemical accounts are usually set up
Option A
Buy re-marked units
Graded A, tested, marked, documented per unit. Simplest arrangement and the most common.
Option B
Toll wash and retest
You keep ownership of your fleet; we wash, test and re-mark on a schedule. No wastewater permit required at your site.
Option C
Dedicated pool
Marked units, never co-mingled, tracked by serial, washed on return. Best option where traceability is audited.
C / COMPATIBILITY
Will HDPE hold it?
Sixteen cargo families, rated
| Cargo family | HDPE | Seat | Notes |
|---|---|---|---|
| Water, potable and non-potable | A | EPDM / silicone | Food-history units for potable |
| Acids and caustics, aqueous | A | EPDM / PTFE | Vent fuming cargo |
| Liquid fertiliser, UAN, NPK | A | EPDM | SG up to 1.32 — check your lift-gate |
| Brine and chloride de-icer | A | EPDM | Hard on galvanising, kind to HDPE |
| Food syrups, oils, concentrates | A | Silicone / Viton | Documented food history only |
| Glycols | A | EPDM | Very common; SG 1.04–1.11 |
| Alcohols | A | Viton / PTFE | Flammable — bond and vent |
| Diesel and gas oil | B | Viton / NBR | Permeates slowly over long storage |
| Mineral spirits | B | Viton | Swells HDPE slowly |
| Surfactants and detergents | B | EPDM | Odour fixation risk — dedicate units |
| Latex, adhesives, water-based paint | A | EPDM | Cures if left. Wash promptly. |
| Ketones, aromatics, chlorinated solvents | C | — | Crazes HDPE. Stainless only. |
| Gasoline and low-conductivity fuels | C | — | Static risk. Steel or stainless. |
| Essential oils, flavour concentrates | C | — | Fixes into the wall permanently. Never. |
| Hydrogen peroxide above 10% | C | — | Decomposition and pressure risk |
| Dairy and hot-fill above 140 °F | C | — | Needs CIP and steam. Stainless. |
Permeation
Small non-polar molecules pass slowly through HDPE rather than attacking it. The bottle looks perfect and your cargo quietly leaves. It is a storage-duration problem: diesel for a week is fine, diesel for a year is not.
Crazing
Ketones, aromatics and chlorinated solvents cause fine surface cracking that propagates under stress. It is invisible until you hold the wall against a raking light, and it is a critical grading failure.
Odour fixation
Terpenes and some surfactants dissolve into the polymer itself rather than sitting on the surface. No wash removes them. This is why a food-grade tote has to have been a food tote from new.
A / SPECIFICATION
Reference
Dimensions, fittings and seat materials
Fig. 1
Fig. 2| Capacity | Litres | Footprint | Height | Tare | Gross (water) | Stack loaded |
|---|---|---|---|---|---|---|
| 275 gal | 1,041 | 48 × 40 in | 46 in | ≈140 lb | ≈2,435 lb | 2 high |
| 330 gal | 1,249 | 48 × 40 in | 53 in | ≈155 lb | ≈2,905 lb | 2 high |
| 350 gal | 1,325 | 48 × 40 in | 56 in | ≈165 lb | ≈3,075 lb | 2 high |
| 120 gal | 454 | 40 × 32 in | 38 in | ≈95 lb | ≈1,095 lb | 2 high |
| 180 gal | 681 | 42 × 36 in | 42 in | ≈115 lb | ≈1,616 lb | 2 high |
| 550 gal | 2,082 | 60 × 48 in | 60 in | ≈240 lb | ≈4,830 lb | 1 high |
B / FITTINGS
What threads onto it
Fittings, threads and seat materials
| Fitting | Size | Seals by | Seat options | Typical service |
|---|---|---|---|---|
| S60x6 butterfly valve | 2 in | Flat gasket face | EPDM, Viton, PTFE | The standard IBC outlet |
| S70x6 butterfly valve | 2 in | Flat gasket face | EPDM, Viton | European and some 330 gal units |
| 2 in NPT ball valve, poly | 2 in | Thread flanks + tape | EPDM, Viton | Retrofits, metered dispensing |
| 2 in NPT ball valve, stainless | 2 in | Thread flanks + tape | PTFE | Solvents, pressure, hot cargo |
| 3 in butterfly valve | 3 in | Flat gasket face | EPDM, Viton | Viscous cargo, high flow |
| 6 in fill cap | 6 in | Gasketed lid | EPDM, silicone | Vented or solid — choose deliberately |
| Camlock adapter, type C | 1.5 / 2 in | Cam arms + gasket | Buna, Viton | Repeated connect / disconnect |
| Bulkhead tap | 3/4 in | Both-side gaskets | Brass, poly | Rain kits, site water |
| Material | Good with | Avoid with | Temperature | Cost |
|---|---|---|---|---|
| EPDM | Water, acids, caustics, brine, ag-chem | Oils, fuels, aromatics | -40 to 250 °F | Low |
| Viton (FKM) | Solvents, oils, fuels, aromatics | Ketones, amines, hot steam | -15 to 400 °F | High |
| Nitrile (NBR) | Oils, diesel, greases, hydraulics | Ozone, strong oxidisers | -30 to 250 °F | Low |
| PTFE envelope | Almost all chemistry, high purity | Needs very flat flange faces | -100 to 450 °F | High |
| Silicone | Food contact, wide temperature | Solvents, abrasion | -60 to 450 °F | Medium |
E / GRADING
A grade is a promise, not a mood
How every unit is scored
| # | Point | Critical? |
|---|---|---|
| 01 | Prior cargo declaration — present, written, specific | Yes |
| 02 | Residual liquid — any volume at all | Yes |
| 03 | Odour after wash — fixed odour by trained nose | Yes |
| 04 | Bottle corner stress whitening | No |
| 05 | Interior scoring you can feel | No |
| 06 | Interior crazing — fine surface cracking | Yes |
| 07 | Bottle bulge or deformation | Yes |
| 08 | Wall thickness at the thinnest point | Yes |
| 09 | Dome port condition and flange flatness | No |
| 10 | Outlet threads — cross-threading, chipping | Yes if crossed |
| 11 | Valve function, full open and close | No, replaceable |
| 12 | Gasket condition — compression set, bloom | No, replaceable |
| 13 | Cage squareness along the top rail | No, pressable |
| 14 | Cage weld integrity at tube intersections | Yes |
| 15 | Cage coating and galvanising loss | No |
| 16 | Pallet condition — cracked feet, rot, corrosion | No, replaceable |
| 17 | Forklift pocket integrity | No |
| 18 | UN marking legibility and date | No, re-markable |
| 19 | Leak test under our procedure | Yes |
D / ORDERING
Commercial terms, up front
Lead times, minimums and what happens when it goes wrong
| Item | Detail |
|---|---|
| Minimum order | One unit. No account minimum, no membership. |
| Stock lead time | Grade A and B 275 gal usually ship the same week |
| Rebottled lead time | 2–3 weeks, built to order in bay D |
| Food-grade lead time | 1–3 weeks when stock exists; supply-dependent |
| Full truckload | 45 on a 48 ft flat, 48 in a 53 ft van, 90 empties double-stacked |
| Payment, first order | Prepay by ACH or card |
| Payment, established | Net 30 on credit approval |
| Grade guarantee | Regrade or replace, our freight both ways, 14 days |
| Leak warranty | 30 days from delivery, normal atmospheric service |
| Cancellation | Free until the truck is loaded |
| Returns | 14 days on unused stock units, freight at your cost |
| Sales tax | Indiana resale certificates and out-of-state equivalents accepted |
G / PITFALLS
Learned the expensive way
Five mistakes that cost people money
Ordering a 330 without measuring the ceiling
A 275 and a 330 share a footprint; the 330 is seven inches taller. Two 330s stacked is 110 inches against 96 for two 275s, and most sprinkler regimes want eighteen inches of clearance below the deflector. That seven inches is frequently the whole margin.
Forcing an NPT fitting into an S60x6 port
Both are roughly two inches, so it bites and feels tight. It is not sealing, it is chewing the buttress thread. The joint weeps two days later, usually in transit, and cross-threading is one of the few faults that condemns an otherwise perfect bottle.
Reusing a flange gasket
A gasket is a one-use part the moment it has taken a compression set. Reusing one is the cause of most 'the new valve still leaks' emails we get. They cost a couple of dollars. Keep a box at the fill point.
Specifying a solid lid on a tote that sees sun
Sealed container, rising temperature, nowhere for the expansion to go. The bottle bulges between the cage bars and does not fully return. A vented lid is the cheapest risk control in this industry.
Ignoring specific gravity
A full 275 of water is 2,435 lb. The same tote of UAN 32 is 3,168 lb, and a 330 is 3,785 lb. Plenty of lift-gates are rated at 2,500 or 3,000 lb, and the rating assumes a centred load.
Send the spec line