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Product · Grade 06
Stainless steel IBCs: the container that essentially never leaves service.
Polyethylene has a service life. Stainless, for practical purposes, does not. A 304 or 316L vessel that is cleaned, passivated and re-valved will outlast the plant it works in — which makes used stainless the single highest-yield reuse decision in bulk packaging, because new stainless is brutally energy intensive to produce.
Short answer
Choose stainless for solvents, aromatics, hot fills, CIP lines and vacuum service. 304 covers general chemistry; specify 316L for chlorides and acids.
- Alloys
- 304 / 316L
- Capacity
- 265–550 gal
- Service life
- Decades
- UN type
- 31A
Form 01 · Spec request
Source a stainless vessel.
Give us alloy, capacity, fitting configuration and whether you need a pressure or vacuum rating. Stainless is sourced against live inventory and refurbished to order.
Specification
What we stock and what it will hold.
| Nominal capacity | Alloy | Typical footprint | Usual fittings | Suited to |
|---|---|---|---|---|
| 265 gal / 1000 L | 304 | 46" × 46" × 51" | 2" ball valve, 18" manway | Solvents, oils, general chemistry |
| 330 gal / 1250 L | 304 | 48" × 42" × 55" | 2" or 3" valve, vented manway | Blending, intermediate storage |
| 350 gal / 1325 L | 316L | 48" × 46" × 56" | Tri-clamp outlet, CIP spray ball | Food acids, chloride chemistry |
| 500–550 gal / 2000 L | 304 or 316L | 52" × 48" × 66" | 3" valve, pressure relief | Bulk transfer, reactor feed |
Refurbishment
What a rebuild includes
- Interior clean, degrease and citric or nitric passivation
- Borescope inspection of welds and the vessel interior
- New valve, manway gasket and all elastomer seals in your chemistry
- Frame and foot repair, re-truing and forklift-pocket inspection
- Hydrostatic or pneumatic pressure test with a signed record
- Re-plating and marking where the unit returns to regulated service
Why it matters
The material case for used stainless
Producing a ton of new stainless carries several times the embodied energy of ordinary carbon steel, largely because of the chromium and nickel content. A 265-gallon vessel is roughly 300 pounds of that alloy.
Reusing a vessel avoids essentially all of it. Even a full refurbishment — clean, passivate, re-valve, test — costs a small fraction of the energy embodied in the metal itself. There is no container decision in this industry with a better ratio of impact avoided to money spent.
It is also the reason we will buy your retired stainless at a real price rather than a scrap price. A vessel is worth far more working than melted.
Questions
Stainless IBCs, answered.
01304 or 316L — which do I need?
304 handles most solvents, oils, alcohols and general chemistry. 316L adds molybdenum, which buys you resistance to chlorides and many acids. If your fluid contains chloride, is a halogenated solvent, or is a food acid at temperature, specify 316L and do not economise.
02Are stainless IBCs pressure rated?
Many are rated for low pressure and full vacuum, typically in the range of 15 to 45 psi depending on the design, with a relief fitting on the manway. The rating is stamped on the vessel plate — never assume it from appearance.
03Why buy used stainless?
Because stainless does not wear out in any practical sense. A twenty-year-old vessel that has been passivated and pressure tested performs like a new one at a fraction of the cost, and reusing it avoids the extremely energy-intensive production of new stainless.
04Can you refurbish a vessel I already own?
Yes. We clean, passivate, replace valves and gaskets, repair or replace the frame, pressure test and re-plate. Send it in or we will collect it on a regular lane.
Keep reading
Alloy selection
304 against 316L, chemistry by chemistry.
The molybdenum in 316L buys resistance to chlorides and many acids. Everywhere else, 304 does the job for less.
| Product family | 304 | 316L | Note |
|---|---|---|---|
| Alcohols and glycols | Good | Good | 304 is sufficient |
| Mineral oils and lubricants | Good | Good | 304 is sufficient |
| Aromatic solvents | Good | Good | The main reason to leave polyethylene |
| Chlorinated solvents | Marginal | Good | Specify 316L |
| Chloride-bearing solutions | Poor — pitting | Good | Specify 316L without exception |
| Sea water and brines | Poor | Good | 316L, and inspect for pitting |
| Organic food acids | Marginal | Good | 316L for vinegar, citric, hot acids |
| Caustic solutions | Good | Good | Both handle alkalis well |
| Dilute mineral acids | Case by case | Better | Depends on concentration and temperature |
| Oxidising acids, concentrated | Poor | Case by case | Verify before committing |
| Hot fills above 60 °C | Good | Good | This is where stainless earns its price |
Refurbishment
What a rebuild involves and what it catches.
| # | Stage | What is done | What it catches |
|---|---|---|---|
| 01 | Intake and identification | Plate transcribed, alloy and ratings recorded, prior contents established | Undocumented or misidentified vessels |
| 02 | Clean and degrease | Interior wash appropriate to prior contents | Product residue and film |
| 03 | Passivation | Citric or nitric treatment to restore the chromium oxide layer | Free iron left by fabrication or cleaning |
| 04 | Borescope inspection | Welds, bottom seam, wall surface examined | Pitting, weld defects, crevice corrosion |
| 05 | Manway and seal faces | Sealing surfaces checked and dressed | Scoring that makes a vessel impossible to seal |
| 06 | Valve and fittings | New valve, manway gasket and elastomer seals in your chemistry | Worn seats and hardened seals |
| 07 | Frame repair | Feet, fork pockets and frame trued and repaired | Handling damage |
| 08 | Pressure test | Hydrostatic or pneumatic test with a signed record | Leaks and weld failures |
| 09 | Re-plate and record | Marking where the vessel returns to regulated service | — |
Handling and safety
Three things stainless does that polyethylene does not.
It holds vacuum — or implodes
Many stainless IBCs are rated for full vacuum, typically alongside a 15 to 45 psi pressure rating. A vessel emptied by pump with the vent closed will pull vacuum, and a tank not rated for it fails immediately and spectacularly. Open the vent. Read the plate.
It takes CIP
Spray balls, tri-clamp connections and clean-in-place routines are normal on stainless and impossible on a composite tote. For food, beverage and pharmaceutical work this is usually the deciding factor rather than chemical compatibility.
It does not depreciate to zero
A twenty-year-old vessel that has been passivated and tested performs like a new one. That is why we buy retired stainless at working value rather than scrap value, and why sending it to a metals merchant is usually a costly reflex.
| # | Check | Looking for | If it fails |
|---|---|---|---|
| 01 | Vessel plate | Alloy, capacity, pressure and vacuum ratings, test date | Do not assume — have the alloy verified |
| 02 | Interior surface | Pitting, particularly near the bottom seam | Pitting is localised and terminal for critical duty |
| 03 | Welds | Cracking, undercut, corrosion at the heat-affected zone | Repairable by a competent stainless welder |
| 04 | Manway seal face | Scoring or deformation | Dressing may recover it |
| 05 | Valve | Full travel, seat condition | Replace as standard |
| 06 | Frame and feet | Impact damage, deformed fork pockets | Usually repairable |
| 07 | Relief fitting | Present and free | Replace before service |
| 08 | Prior contents | Documented | Determines cleaning route and food eligibility |
Extended FAQ · 7 questions
More questions, answered
01Should I specify 304 or 316L?
304 handles most solvents, oils, alcohols and general chemistry. 316L adds molybdenum, which buys resistance to chlorides and many acids. If your fluid contains chloride, is a halogenated solvent, or is a food acid at temperature, specify 316L and do not economise.
02Can I identify the alloy without the plate?
Not reliably. A magnet gives a hint — both 304 and 316 are largely non-magnetic annealed, and worked areas can be slightly magnetic — but it is not conclusive. If the alloy matters, have it tested rather than guessed.
03Are stainless IBCs pressure rated?
Many are rated for low pressure and full vacuum, typically 15 to 45 psi depending on the design, with a relief fitting on the manway. The rating is stamped on the vessel plate. Never assume it from appearance.
04What is passivation and why does it matter?
A controlled citric or nitric acid treatment that removes free iron left by fabrication or cleaning and lets the protective chromium oxide layer reform. A refurbished vessel that has not been passivated will show rust spotting within months even though the alloy is sound.
05Why buy used stainless rather than new?
Because stainless does not wear out in any practical sense, and producing new stainless is extremely energy intensive because of the chromium and nickel. A cleaned, passivated and tested vessel performs like a new one at a fraction of the cost.
06Can you refurbish a vessel I already own?
Yes — clean, passivate, borescope inspect, replace the valve and every elastomer seal, repair the frame, pressure test and re-plate. Send it in or we will collect it on a regular lane.
07What is the residual value after a decade?
High, and that is the point. A stainless vessel is closer to a machine tool than to packaging. It depreciates slowly and there is always a buyer, which is why we pay working value rather than scrap value for retired vessels.
Next step
Tell us the fluid and the temperature.
Alloy selection is a five-minute conversation that prevents a five-figure mistake. Send the chemistry and we will specify it properly.