Reading the frame

The pallet and the cage tell you more than the bottle does.

A bottle tells you what was in it. The cage and the base tell you where it has been, how it was handled, how many more years it has, and whether it is safe to stack. Learn to read them and you will never buy a bad tote again.

Short answer

IBC pallet bases come in steel, composite, plastic and wood. Steel is the most repairable and dominates reconditioned fleets; wood is unsuitable for wet service. Cage condition is judged at the welded nodes, not the tube faces — rust or cracking at a node means the container must not be stacked.

Base types: 4
Typical apertures: 54 · 60 · 72
Cage service life: 15–25 years
Inspection point: Weld nodes

Work order · 90-second form

Ask about frame condition

Describe the duty and the supplier can suggest the base type and cage condition that suits it.

Base types

Four bases, four different lifetimes.

IBC pallet base comparison
Base type	Repairable	Wash-down	Best for	Fails by
Steel	Yes — straighten, weld, recoat	Good	Reconditioned fleets, heavy duty	Rust-through at fork pockets
Composite (steel + plastic deck)	Partly	Very good	General industrial	Deck cracking, delamination
Plastic (HDPE)	No	Excellent	Wash-down environments	Fork pocket cracking
Wood	Yes, poorly	Poor	Dry, single-trip export	Rot, fastener pull-through, pests

Cage inspection

What to check, in order.

Four minutes per container on the intake line. You can run the same sequence on any tote anyone offers you.

Cage inspection sequence
Step	What to look at	Pass	Fail
1. Nodes	Welded tube intersections, all four corners	Clean bead, no bloom	Rust bloom or visible crack → no stacking
2. Corner posts	Sight down each vertical	Straight within ¼"	Bow over ½" → straighten or scrap
3. Base rails	Fork pocket edges	Dented but sound	Torn or perforated → replace base
4. Squareness	Diagonal measurements across the top frame	Within 1"	Over 1" out → frame jig or scrap
5. Coating	Galvanising or paint on tube faces	Surface oxidation only	Flaking with pitting → recoat
6. Bottle seat	Where bottle meets base deck	Even contact	Gap or bulge → bottle or base fault
7. Plate	Manufacture date, UN marking	Legible	Illegible → non-regulated service only

Grid patterns as a fingerprint

Composite IBC cages are built from horizontal and vertical tube runs welded into a lattice. Count the apertures on the long face and you learn quite a lot. A 54-aperture grid is the most common North American pattern. A 60 is typically a European build or a heavier-duty variant. A 72 is a tight-grid cage used where bottle bulge under head pressure must be controlled — dense chemistry, tall columns, elevated temperature.

For a buyer, the practical use of this is bottle compatibility. A replacement bottle is moulded to seat against a particular grid geometry; the wrong bottle in the right cage bulges through the apertures and abrades. When a cage is rebottled, matching the grid pattern is the first thing to get right.

What a very old cage is worth

A 1990s cage in sound condition is not scrap — it is proven steel. Galvanising from that era is frequently heavier than current production, and a frame that has survived thirty years of forklifts without going out of square has demonstrated something a new frame has not. Such cages can often be rebottled. Regulated transport is a separate question: the marking belongs to a tested assembly, not to the steel, so check current regulations.

Cage grid patterns and what they indicate
Apertures	Typical origin	Indicates	Rebottle profile
54	North American standard	General-purpose 275 gal build	Profile A
60	European / heavier duty	Tighter bottle support	Profile B
72	Dense-product duty	Bulge control, elevated temperature	Profile C
48 (wide)	Economy / single-trip	Lighter frame, lower stack rating	Profile A (check)
Mixed / repaired	Reconditioned frame	Prior repair — inspect nodes closely	Measure first

Frame questions

Bases and cages.

Pallets & cages — FAQ

Which IBC pallet base is best?

Steel for durability and repairability, composite for a balance of weight and corrosion resistance, plastic for wash-down and food environments, and wood for nothing at all in wet service. Steel bases dent and rust but can be straightened and recoated indefinitely, which is why they dominate reconditioned fleets. Plastic bases are lighter and hygienic but crack at the fork pockets and cannot be repaired.

Why does the cage grid pattern differ between totes?

Manufacturers use different tube spacing and node counts — commonly 54, 60 or 72 apertures on a 275 gallon frame. Tighter grids support the bottle better under head pressure and resist bulge; wider grids are lighter and cheaper. For reconditioning purposes, the pattern is also a fingerprint: it tells us the manufacturer, roughly the era, and which replacement bottle will seat correctly.

How do I inspect an IBC cage for damage?

Ignore the panels and look at the nodes — the welded intersections where the load actually travels. Surface rust on tube faces is cosmetic; rust blooming at a node, or a node with a visible crack in the weld bead, means the load path is compromised and the unit should not be stacked. Then sight down the four corner posts for bow, and check the base rails at the fork pockets, where forklift damage concentrates.

Can a damaged cage be repaired?

Usually. Bowed verticals go on a hydraulic straightening jig, surface rust is wire-wheeled and conversion-coated, and broken nodes can be re-welded by a certified welder where the geometry allows. What cannot be repaired economically is structural corrosion through the tube wall, or a frame that has been racked out of square by more than about an inch. Those cages go to a steel mill, which is itself a fully circular outcome.

Reconditioning

Straightening, de-rusting, base replacement, valve swap and recertification.

Open

Grades explained

How cage and base condition feed into the grade printed on your quote.

Open

When the frame is finished

Steel to a mill, HDPE to regrind. Nothing goes in a hole.

Open

IBC reference · on every page

Reference sheets for the numbers people ask about most.

Specifications, grade descriptions, thread standards, weights, gasket selection, freight limits and conversions. Open what you need; none of it is gated.

Container specs14 rows

Typical dimensions for the two common composite sizes. Check the plate on a specific unit.

The two common composite IBC sizes
Attribute	275 gallon	330 gallon
Capacity	275 gal / 1,041 L	330 gal / 1,249 L
Footprint	48" × 40"	48" × 40"
Height	46"	53"
Tare weight	125–135 lb	140–155 lb
Gross, water	≈2,425 lb	≈2,900 lb
Max gross mass	2,800 lb	3,300 lb
Stack, full	2 high	2 high
Stack, empty	4 high	4 high
Two-high stack height	92"	106"
Per 53′ van, volume	48	40
Per 53′ van, weight-limited	17 full	14 full
Fill opening	6" vented or solid	6" vented or solid
Discharge	2" butterfly, S60x6	2" butterfly, S60x6
Forklift entry	4-way	4-way

Grade descriptions6 rows

How grades are commonly described. Ask each supplier for their own written definition.

Common used-tote grade descriptions (definitions vary by supplier)
	Grade A	Grade B	Grade C
Cleaning	Washed or rinsed	Washed	Rinsed or as-is
Bottle	Clear to translucent	Light haze permitted	Staining likely
Odour	None	Faint, product-typical	May be present
Prior contents	Known, benign	Known	May be unknown
Cage	Square, little rust	Sound, cosmetic dents	Cosmetic damage
Typical use	Clean-water and general storage	Industrial and agricultural	Non-potable water, waste, rough duty

Threads & adapters9 rows

The outlet thread decides which adapter you need.

Threads and adapters
Fitting	Specification	Typical use
3" butterfly	3" flange, PP body	Batch dumping, viscous liquids
2" butterfly	S60x6 outlet, EPDM seat	Standard discharge
2" camlock	S60x6 → 2″ male cam	Pump and transfer hose
2" NPT	S60x6 → 2″ male NPT	Rigid plumbing
1" camlock	S60x6 → 1″ male cam	Controlled filling
3/4" GHT	S60x6 → garden hose	Irrigation, wash-down
1/2" spigot	S60x6 → spigot	Hand filling
S60x6	60 mm OD, 6 mm pitch buttress	Common modern outlet thread
S100x8	100 mm OD, 8 mm pitch	Older or European valves — use a bushing

Weights by product10 rows

gallons × 8.34 × specific gravity + tare. The number people skip.

Gross weight by product — the calculation people skip
Product	SG	275 gal gross	330 gal gross	Stack?
Ethanol	0.79	1,940 lb	2,310 lb	Yes
Diesel / fuel oil	0.85	2,080 lb	2,480 lb	Yes — steel bin only
Vegetable oil	0.92	2,240 lb	2,670 lb	Yes
Water	1.00	2,425 lb	2,900 lb	Yes
Latex emulsion	1.05	2,540 lb	3,040 lb	With care
Brine 23%	1.20	2,880 lb	3,450 lb	No
Liquid fertiliser 28-0-0	1.28	3,065 lb	3,670 lb	No
Corn syrup 42 DE	1.33	3,180 lb	3,810 lb	No — partial fill
Sulphuric acid 50%	1.40	3,340 lb	4,000 lb	Partial fill
Sodium hydroxide 50%	1.52	3,615 lb	4,335 lb	Partial fill

Gasket selection9 rows

General guidance only. Confirm compatibility with the product's SDS and your supplier.

Gasket and wetted-part selection
Product family	Gasket	Valve body	Container	Avoid
Water, brine, glycol	EPDM	Polypropylene	Poly IBC	—
Dilute acids	EPDM	Polypropylene	Poly IBC	Brass, carbon steel
Caustics	EPDM	Polypropylene	Poly IBC	Aluminium
Alcohols under 20% ABV	EPDM	Polypropylene	Poly IBC	—
Alcohols over 20% ABV	Viton	Stainless	Stainless bin	Poly bottles
Vegetable and mineral oils	Viton	Polypropylene	Poly IBC	EPDM gaskets
Fuels, diesel, kerosene	Viton	PP or stainless	Steel bin	Poly bottles
Aromatic solvents	Viton	Stainless	316L bin	All poly parts
Flavour, essence, botanical	Viton	Stainless	316L bin	Poly bottles

Freight limits8 rows

Volume capacity and weight capacity are different numbers, and weight wins.

What fits on what — volume and weight limits
Vehicle	Full, 2 high	Weight-limited full	Empty, 4 high	Liftgate
53′ dry van	48	17	96	No
48′ flatbed	40	17	80	No
26′ box truck	24	8	48	Yes
16′ box truck	12	5	24	Yes
Sprinter van	4	2	8	Yes
20′ sea container	20	17	40	No
40′ sea container	42	17	84	No
Drop trailer, 53′	48	17	96	No

Conversions10 rows

The arithmetic that comes up daily.

Common conversions for IBC totes
From	To	Multiply by	Worked example
US gallons	Litres	3.785	275 gal = 1,041 L
Litres	US gallons	0.2642	1,000 L = 264 gal
US gallons of water	Pounds	8.34	275 gal = 2,294 lb
Pounds	Kilograms	0.4536	2,425 lb = 1,100 kg
Inches	Millimetres	25.4	48" = 1,219 mm
Cubic feet	US gallons	7.481	51 ft³ = 381 gal
Cubic yards	Cubic feet	27	1.4 yd³ = 37.8 ft³
psi	Feet of head (water)	2.31	1.7 psi = 3.9 ft
Feet of head	psi	0.433	24 in stand = 0.87 psi
gpm	Litres per minute	3.785	70 gpm = 265 L/min

Vocabulary, in twelve lines

IBC: Intermediate bulk container — anything between a drum and a tanker, in practice 110–550 gallons on a forkliftable base.
Composite IBC: An HDPE bottle inside a welded steel cage on a pallet base. The 275 and 330 gallon workhorses.
Tare: Empty weight of the container: 125–135 lb for a 275, 140–155 lb for a 330.
Gross mass: Container plus contents. Most 275s are rated to 2,800 lb; exceed it and the bottle bulges rather than bursts.
Node: A welded intersection in the cage where load actually transfers. The correct place to inspect.
S60x6: The standard outlet thread: 60 mm OD, 6 mm pitch buttress. Hand tight only.
Prior contents: What the container last held, logged against the original label. The single most consequential fact about any used tote.
Rebottle: A new HDPE bottle fitted into an inspected existing cage — a never-filled interior on a reused frame.
UN 31HA1: Marking for a composite IBC approved for liquids. Belongs to the assembly and carries a service life.
Regrind: Granulated recycled HDPE. Post-industrial IBC regrind goes to pipe, conduit, pallets — never food contact.
Reuse: Putting a container back into service instead of making a new one. It avoids the materials and energy a new container would need.

Full glossary

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Next step

Reusing a tote avoids making a new one.

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