ISO Tank Container Reference
An ISO tank container is a cylindrical pressure vessel mounted in a 20-foot ISO 1496-3 container frame, designed to transport bulk liquids, gases, and powders intermodally by sea, road, and rail. The UN portable tank classification system in IMDG Chapter 6.7 splits tanks into four families: T1 through T22 for liquids and solids of Classes 1 and 3 to 9, T23 for Class 4.1 self-reactive substances and Class 5.2 organic peroxides, T50 for non-refrigerated liquefied gases, and T75 for cryogenic refrigerated liquefied gases.
Updated 2026-05-04
T-code matrix (the legal classification)
UN Portable Tank Instructions per IMDG 4.2.5.2.6 and 6.7.2 / 6.7.3 / 6.7.4. Shell thickness is stated in reference steel (Rm 370 N/mm2); the 316L equivalent is calculated through the Lloyd's formula in IMDG 6.7.2.4.
| Code | Min test pressure (bar) | Min shell (ref steel mm) | Min shell (316L mm) | Bottom outlet | Pressure relief | Typical cargo |
|---|---|---|---|---|---|---|
| T1 | 1.5 | 6 | 4.18 | Allowed | Normal PRV | Wine, juice, glycerin, water, light non-haz liquids |
| T2 | 1.5 | 6 | 4.18 | Solids only | Normal PRV | Solid Class 9, certain non-haz solids |
| T3 | 2.65 | 6 | 4.18 | Allowed | Normal PRV | Diesel, jet fuel, kerosene, crude oil |
| T4 | 2.65 | 6 | 4.18 | Solids only | Normal PRV | Edible / non-edible oils, animal fats |
| T5 | 2.65 | 6 | 4.18 | Not allowed | Frangible disc | Class 5.1 oxidisers without bottom outlet |
| T6 | 4 | 6 | 4.18 | Allowed | Normal PRV | Class 3 PG II flammables: methanol, ethanol, acetone, MEK, toluene |
| T7 | 4 | 6 | 4.18 | Solids only | Normal PRV | Class 3 PG II + III, certain Class 8 |
| T8 | 4 | 6 | 4.18 | Not allowed | Normal PRV | Class 8 PG I corrosives, certain Class 6.1 |
| T9 | 4 | 6 | 4.18 | Not allowed | Frangible disc | High-hazard Class 6.1 / Class 8 |
| T10 | 4 | 6 | 4.18 | Not allowed | Frangible disc | High-hazard cargoes, some Class 6.1 |
| T11 | 6 | 6 | 4.18 | Allowed | Normal PRV | The workhorse: ~1,000 UN cargoes (PG II/III), food-grade, water, alcohols, glycols, mild acids and bases compatible with 316L |
| T12 | 6 | 6 | 4.18 | Solids only | Frangible disc | Class 6.1 PG II, certain Class 8 |
| T13 | 6 | 6 | 4.18 | Not allowed | Normal PRV | Higher-hazard Class 8 |
| T14 | 6 | 6 | 4.18 | Not allowed | Frangible disc plus tell-tale gauge | PG I corrosives, Class 6.1 PG I/II: 98% sulphuric acid (UN 1830), oleum, fuming nitric, hydrofluoric, sodium hypochlorite, hydrogen peroxide |
| T15 | 10 | 6 | 4.18 | Allowed | Normal PRV | High-vapour-pressure Class 3 |
| T16 | 10 | 6 | 4.18 | Solids only | Frangible disc | High-vapour-pressure toxic / corrosive |
| T17 | 10 | 6 | 4.18 | Solids only | Normal PRV | High-pressure flammable / toxic |
| T18 | 10 | 6 | 4.18 | Solids only | Frangible disc | High-pressure highly hazardous |
| T19 | 10 | 6 | 4.18 | Not allowed | Frangible disc | Class 6.1 highest hazard |
| T20 | 10 | 8 | 5.57 | Not allowed | Frangible disc | Bromine UN 1744, titanium tetrachloride UN 1838, trichlorosilane UN 1295 |
| T21 | 10 | 10 | 6.96 | Not allowed | Normal PRV | Pyrophorics: TEAL UN 3394, BFEE UN 2604, methyl iodide UN 2644 |
| T22 | 10 | 10 | 6.96 | Not allowed | Frangible disc | Highest-hazard organometallics, fluorination products, Hazard Zone A / B toxic-by-inhalation substances |
| T23 | 4 | Per UN entry | Per UN entry | Not allowed | Per UN entry plus emergency-relief device | Class 4.1 self-reactive substances and Class 5.2 organic peroxides: tert-butyl hydroperoxide, dicumyl peroxide, peroxyacetic acid |
| T50 | Per gas (5 to 34.4) | Per gas | Per gas | Per UN gas entry | Various, often frangible | Non-refrigerated liquefied gases: LPG, ammonia, chlorine, ethylene oxide, VCM, R-22 to R-410 refrigerants |
| T75 | Vacuum-jacketed (10 to 24) | Per gas | Per gas | Not allowed | Vapour-line PRV plus frangible disc | Cryogenic refrigerated gases: LIN, LOX, LAR, LCO2, LNG, LH2, LHe, ethylene |
The IMDG Dangerous Goods List Column 13 is authoritative for any specific UN entry. T50 MAWP varies by gas and insulation state per the IMDG T50 table; T75 MAWP varies by cryogenic cargo per IMDG 6.7.4.
The T-code substitution rule
Per IMDG 4.2.5.2.5, a substance assigned a specific T-code may also be carried in any stronger T-code, where stronger means equal or greater minimum test pressure, equal or greater minimum shell thickness, equal or stricter bottom-outlet provisions, and equal or stricter pressure-relief provisions. A T11 cargo may ride T11 through T22. A T6 cargo may ride T6 through T22. A T1 cargo may ride any code from T1 through T22.
T23, T50, and T75 do not participate in the substitution rule. They are family-specific (organic peroxides, liquefied gases, cryogenic gases) and require a tank built to that exact code.
Frame sizes (ISO 668)
Outer dimensions per ISO 668:2020 Series 1 freight containers. Corner castings per ISO 1161. Universal twist-lock compatibility for the 10, 20, 30, and 40 ft frames.
| Size | Designation | Length (mm) | Width (mm) | Height (mm) | Typical use |
|---|---|---|---|---|---|
| 10 ft | Half-height / offshore | 2,991 | 2,438 | 2,591 | Offshore DNV 2.7-1 rig-supply, small chemical (1,000 to 10,000 L) |
| 20 ft | ISO 1CC / 1AA | 6,058 | 2,438 | 2,591 | Standard global ocean ISO tank, 80%+ of fleet |
| 30 ft | ISO 1CCC | 9,125 | 2,438 | 2,591 | Bitumen, heated specialised tanks, cement silos |
| 40 ft | ISO 1AAA | 12,192 | 2,438 | 2,591 | Cryogenic LNG, LH2, ethylene, high-volume light-density liquid |
| 45 ft | Intra-EU swap body (non-ISO) | 13,716 | 2,550 | 2,591 | Non-ISO width swap bodies up to 35,000 L. Cannot ride deep-sea container slots. |
Tank type pages
Each page carries the full dimensional spec (frame, shell, capacity, weights, pressure), permitted UN cargoes, manufacturers, operators, indicative pricing, certifications, sources, and a deep-link to the loading calculator.
UN Portable Tank Instructions
Every T-code from T1 to T22 plus T23, T50, T75. The legal classification system in IMDG Chapter 6.7.
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T1 ISO Tank Container (wine, juice, glycerin, water, light non-haz liquids)
T1 portable tanks ride 1.5 bar test pressure with a normal PRV and bottom outlet allowed. The lowest-pressure family. Built for wine, juice, glycerin, water, light non-haz liquids. Often food-grade certified and dedicated.
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T10 ISO Tank Container (high-hazard, no BO)
T10 portable tanks ride 4 bar test pressure with 6 mm reference shell, no bottom outlet, frangible disc. Built for high-hazard cargoes including some Class 6.1 toxics.
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T11 ISO Tank Container (general chemical workhorse)
T11 is the most widely used UN portable tank in the global chemical fleet. Min test pressure 6 bar, MAWP 4 bar, 6 mm reference steel shell (4.18 mm 316L equivalent), bottom outlet allowed, normal PRV. Permitted for around 1,000 UN-numbered chemicals plus food-grade and water cargoes.
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T12 ISO Tank Container (Class 6.1 PG II)
T12 portable tanks ride 6 bar test pressure with bottom outlet permitted only for solids and a frangible-disc plus tell-tale-gauge relief regime. Built for Class 6.1 PG II toxics and certain Class 8.
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T13 ISO Tank Container (higher-hazard Class 8)
T13 portable tanks ride 6 bar test pressure with 6 mm reference shell explicitly required, no bottom outlet, normal PRV. Built for higher-hazard Class 8 corrosives that don't need a frangible disc.
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T14 ISO Tank Container (high-hazard corrosives, no bottom outlet)
T14 is the high-hazard liquid portable tank: 6 bar test, 4 bar MAWP, 6 mm reference shell, NO bottom outlet, frangible disc plus tell-tale gauge. Mandatory for PG I corrosives and Class 6.1 PG I/II toxics: 98% sulphuric, oleum, fuming nitric, hydrofluoric, sodium hypochlorite (with linings).
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T15 ISO Tank Container (high-vapour-pressure Class 3)
T15 portable tanks ride 10 bar test pressure with bottom outlet allowed and normal PRV. Built for Class 3 flammables with high vapour pressure that exceed the T11 envelope but don't need the no-BO rule of T8 / T14.
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T16 ISO Tank Container (high-vapour-pressure toxic / corrosive)
T16 portable tanks ride 10 bar test pressure with bottom outlet permitted only for solids and a frangible-disc relief regime. Built for high-vapour-pressure Class 6.1 toxics and Class 8 corrosives.
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T17 ISO Tank Container (high-pressure flammable / toxic)
T17 portable tanks ride 10 bar test pressure with 6 mm reference shell, bottom outlet permitted only for solids, normal PRV. Built for high-pressure Class 3 / 6.1 / 8 cargoes that fit the no-frangible-disc envelope.
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T18 ISO Tank Container (high-pressure highly hazardous)
T18 portable tanks ride 10 bar test pressure with 6 mm reference shell, bottom outlet permitted only for solids, frangible disc plus tell-tale gauge. Built for high-pressure highly hazardous Class 3 / 6.1 / 8 cargoes.
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T19 ISO Tank Container (Class 6.1 highest hazard, no BO)
T19 portable tanks ride 10 bar test pressure with 6 mm reference shell, no bottom outlet, frangible disc plus tell-tale gauge. Built for the highest-hazard Class 6.1 toxics.
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T2 ISO Tank Container (non-hazardous solids)
T2 portable tanks ride 1.5 bar test pressure with bottom outlet permitted only for solids and a normal PRV. Built for non-hazardous solid cargoes including some Class 9 materials and bulk powders.
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T20 ISO Tank Container (bromine, titanium tetrachloride, trichlorosilane)
T20 portable tanks ride 10 bar test with 8 mm reference-steel shell (5.57 mm 316L), no bottom outlet, frangible disc. Mandatory for the heaviest-hazard liquids: bromine UN 1744 lead-lined, titanium tetrachloride UN 1838, trichlorosilane UN 1295.
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T21 ISO Tank Container (pyrophorics, water-reactive organometallics)
T21 portable tanks ride 10 bar test pressure with 10 mm reference-steel shell, no bottom outlet, normal PRV. Built for pyrophoric and water-reactive organometallics: TEAL UN 3394, BFEE UN 2604, methyl iodide UN 2644, Ziegler-Natta catalysts.
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T22 ISO Tank Container (highest-hazard organometallics, fluorinations)
T22 portable tanks ride 10 bar test, 10 mm reference-steel shell (6.96 mm 316L), no bottom outlet, frangible disc. ASME U-stamp mandatory under 49 CFR 178.275. The heaviest commercial standard for organometallics, fluorination products, Hazard Zone A/B toxics.
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T23 ISO Tank Container (organic peroxides, self-reactive substances)
T23 portable tanks ride 4 bar test pressure with temperature sensors, emergency-relief devices, and temperature-controlled transport. Mandatory for Class 4.1 self-reactive substances and Class 5.2 organic peroxides. No fusible elements in the shell. Max 2,000 kg per tank for some entries.
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T3 ISO Tank Container (diesel, jet fuel, kerosene, crude oil)
T3 portable tanks ride 2.65 bar test pressure with a normal PRV and bottom outlet allowed. The standard build for distillate fuels and Class 3 PG III light flammables: diesel, jet fuel, kerosene, crude oil.
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T4 ISO Tank Container (edible / non-edible oils, animal fats)
T4 portable tanks ride 2.65 bar test with bottom outlet permitted for solids only. The standard build for palm oil, sunflower oil, soybean oil, coconut oil, animal fats. Often heated and food-grade certified.
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T5 ISO Tank Container (Class 5.1 oxidisers, no bottom outlet)
T5 portable tanks ride 2.65 bar test pressure with no bottom outlet and frangible-disc relief. Built for Class 5.1 oxidisers without bottom outlet: hydrogen peroxide, perchloric acid, ammonium nitrate solution.
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T50 ISO Tank Container (non-refrigerated liquefied gases)
T50 portable tanks carry non-refrigerated liquefied gases under pressure: LPG, anhydrous ammonia, chlorine, ethylene oxide, vinyl chloride, refrigerant gases (R-22 to R-410). MAWP ranges 7 to 34.4 bar by gas. Typical tare 9,000 to 11,500 kg, 24,300 L.
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T6 ISO Tank Container (Class 3 PG II flammables)
T6 portable tanks ride 4 bar test pressure with a normal PRV and bottom outlet allowed. Permitted for Class 3 packing-group II flammables: methanol, ethanol, acetone, MEK, toluene, xylene, IPA. In practice most Class 3 PG II ships in T11 because the substitution rule allows it and the operator fleet is bigger.
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T7 ISO Tank Container (Class 3 PG II/III plus certain Class 8)
T7 is the 4 bar test pressure portable tank with bottom outlet permitted only for solids. Common build for the China-Australia caustic / HCl / sodium hypochlorite trade in carbon-steel + LDPE rotomoulded liner.
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T75 ISO Tank Container (cryogenic refrigerated liquefied gases)
T75 portable tanks carry cryogenic gases at temperatures down to -253 deg C: LIN, LOX, LAR, LCO2, LNG, LH2, ethylene. Vacuum-jacketed double-wall construction with 304L stainless inner vessel. MAWP 10 to 24 bar. Holding times 60 to 200 days depending on cargo and insulation.
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T8 ISO Tank Container (Class 8 PG I corrosives, no bottom outlet)
T8 portable tanks ride 4 bar test with NO bottom outlet, normal PRV. Mandatory for certain Class 8 PG I corrosives where bottom-outlet failure under fire conditions is unacceptable.
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T9 ISO Tank Container (high-hazard Class 6.1 / 8, no BO)
T9 portable tanks ride 4 bar test pressure with 6 mm reference shell explicitly required, no bottom outlet, frangible disc. Built for high-hazard Class 6.1 toxics and Class 8 corrosives.
Design and Build Variants
Food-grade, pharma, lined, heated, reefer, baffled, swap-body, offshore, powder. Cuts across T-codes.
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Baffled ISO Tank Container (partial-load surge control)
Baffled ISO tanks have 2 to 4 internal vertical perforated baffles dividing the cylinder into 3 to 5 compartments. Lifts the IMDG 4.2.1.9.1.1 20 to 80% surge floor. Required for ADR 6.8.2.1.22 and DOT 49 CFR 178.345-7 compliance on dense or partial-fill cargoes.
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Beam Frame ISO Tank Container (open beam, lighter tare)
Beam frame ISO tanks mount the cylinder in an open beam frame rather than a full-collar frame. Saves 200 to 400 kg of tare. Used where weight optimisation matters and the cylinder doesn't need full crash protection.
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Bitutainer / Direct-Flame Heated Bitumen ISO Tank Container
Direct-flame heated 30ft bitutainer (Danteco design). 0.55 bar test, double-skin bunded super-insulated, flame-tube heated, baffled. 28,500 L typical. Service temperature 140 to 180 deg C for bitumen UN 3257. Thermal-oil and electric variants also available.
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Food-Grade T11 ISO Tank Container (FDA / Kosher / Halal)
Food-grade T11 builds carry wine, spirits, juice, edible oils, dairy, syrup, and other food cargoes in dedicated equipment. Polished interior Ra <= 0.8 micrometres, CIP spray balls, FDA 21 CFR 177, EU 1935/2004, Kosher, Halal certifications.
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ECTFE-Lined ISO Tank Container (Halar, semiconductor / high-purity)
ECTFE (Halar) lined ISO tanks resist pH 1 to 14 at 120 deg C continuous. 98% sulphuric, 70% HF, 50% NaOH at 140 deg C, sodium hypochlorite, chlorine, ozone. Premium semiconductor and high-purity build. AGRU is the dominant liner specialist.
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FRP-Lined ISO Tank Container (GRP, fibreglass-reinforced plastic)
FRP / GRP-lined ISO tanks use 8 to 12 mm fibreglass-reinforced plastic liner for mild acid service and waste-water applications. Niche build with limited deep-sea fleet inventory.
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Glycol-Jacketed ISO Tank Container (gentle heating)
Glycol-jacketed and hot-water-jacketed ISO tanks deliver gentle heating compatible with food-grade compatibility. Used for liquid chocolate (45 deg C), liquid sugar, honey, edible oils. Eltherm, Holvrieka, Klinge, Loebbe are the major builders.
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Heated / Steam-Jacketed ISO Tank Container
Heated ISO tanks use 8 to 12 internal stainless steam coils or a full external steam jacket to keep cargoes liquid above their melting points. Glacial acetic acid (16.6 deg C), phenol (41 deg C), liquid sugar, chocolate, fatty alcohols, sulphur, bitumen.
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Insulated (Non-Refrigerated) ISO Tank Container
Insulated non-refrigerated ISO tanks use 50 to 100 mm polyurethane foam insulation under aluminium or GRP cladding. Standard build for most chemical T11s. Reduces heat ingress on long ocean voyages and prevents thermal-expansion overpressure.
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ISO Tube Module / Tube Trailer (high-pressure compressed gases)
ISO tube modules are not technically portable tanks but high-pressure cylinder banks (200 to 500 bar) mounted in ISO 10ft, 20ft, or 40ft frames. Used for helium, hydrogen, oxygen, nitrogen, CNG. DOT 3AA / 3AAX or ISO 11120 cylinder specification.
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Lead-Lined ISO Tank Container (legacy concentrated H2SO4)
Lead-lined ISO tanks carry concentrated sulphuric acid 78 to 98% in legacy fleets. 3 to 6 mm lead lining inside a carbon-steel shell. Phasing out due to weight penalty (heavier tare cuts payload) and end-of-life lead-disposal cost. PTFE-lined builds replacing on new orders.
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Multi-Compartment ISO Tank Container (2 to 3 separate compartments)
Multi-compartment ISO tanks divide the cylinder into 2 or 3 separate compartments of 7,000 to 10,000 L each, with independent valves to prevent cross-contamination. Used for shipping multiple compatible cargoes simultaneously, or for partial-load multi-drop routes.
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Offshore DNV 2.7-1 / EN 12079 ISO Tank Container
Offshore DNV 2.7-1 / EN 12079 / DNVGL-ST-E271 ISO tanks for oil and gas rig supply. 10ft frame typical (1,000 to 10,000 L), 21H1 beam frame for the workhorse 4,542 L T11 build. Withstands 30-deg static tilt, dynamic shock loads, crash-frame impacts. Recertified every 12 months.
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PE-Lined ISO Tank Container (LDPE / LLDPE / HDPE rotomoulded)
PE-lined ISO tanks carry HCl 35%, NaOH 50%, sodium hypochlorite, phosphoric acid, dilute acids. Carbon-steel shell with 16 to 20 mm rotomoulded LDPE / LLDPE liner. The China-Australia chemical lane workhorse for corrosive cargoes that attack stainless steel.
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Pharma-Grade ISO Tank Container (mirror polish, CIP/SIP, ASME BPE)
Pharma-grade ISO tanks ship pharma intermediates, glycerine USP, propylene glycol USP, IPA pharma-grade, MEG pharma. Mirror-polished interior Ra <= 0.4 micrometres, full pickling and electropolishing, CIP plus SIP, ASME BPE-compliant fittings, FDA 21 CFR 210/211 cGMP cleaning.
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Phenolic / Epoxy-Phenolic-Coated ISO Tank Container
Phenolic and epoxy-phenolic coatings 0.4 to 0.8 mm thick provide a hard, brittle barrier between cargo and steel substrate. Used for solvents and mid-acidity chemicals where bare 316L gives surface contamination.
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Powder / Silo ISO Tank Container (pneumatic discharge, ISO 22 series)
Powder and silo ISO tanks discharge dry-bulk cargo via pneumatic conveying. Aluminium or carbon-steel shell at 2 bar pressure rating. 17,500 to 25,000 L. Cement, fly-ash, plastic pellets (PE, PP, PVC, PET, ABS), flour, sugar, animal feed, fertiliser. ECTA / Cefic / EFTCO cleaning standard.
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PTFE / FEP / PFA-Lined ISO Tank Container (highest chemical resistance)
PTFE / FEP / PFA-lined ISO tanks resist 98% sulphuric, oleum, HF up to 70%, NaOH 50% to 120 deg C, sodium hypochlorite, chlorine gas, ozone. 2 to 5 mm sheet liner mounted via fixpoint inside a carbon-steel or 316L shell. Premium price ~30% above unlined T14.
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PVDF-Lined ISO Tank Container (Solef / Kynar)
PVDF (Solef, Kynar) lined ISO tanks resist many acids and bases including hydrogen peroxide, with NaOH compatibility up to 140 deg C. Used for high-purity and medical chemistry where PE is insufficient and PTFE is over-spec.
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Reefer ISO Tank Container (integrated refrigeration unit)
Reefer ISO tanks integrate Klinge, Carrier, Daikin, or Star Cool refrigeration units on the front wall. Maintain -40 to +30 deg C on shore power, generator set, or vessel reefer plug. Used for latex, juice concentrates, dairy, pharma actives, premium wines, biologics.
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Rubber-Lined ISO Tank Container (natural / bromobutyl / chlorobutyl)
Rubber-lined ISO tanks use 4 to 8 mm soft natural rubber, bromobutyl, or chlorobutyl liners for concentrated HCl 30 to 37% and dilute sulphuric to 70%. Marflex PG70 / HB50HT / VE621BC are the standard grades. Mid-grade chemical resistance, lower cost than PTFE.
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Swap Body Tank Container (intra-EU 23 to 25 ft, NOT deep-sea)
Swap body tank containers operate at 23 to 25 ft frame length with retractable support legs and 2,550 mm width. Intra-EU road / rail / short-sea ferry only. NOT lifted between deep-sea container slots. 28,000 to 37,000 L typical, MGW 38,000 kg.
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Tantalum / Hastelloy / Titanium-Clad ISO Tank Container (anhydrous HF, hottest acids)
Tantalum-clad, Hastelloy-clad, and titanium-clad ISO tanks handle anhydrous HF, ultrapure HF 70%, phosphorus trichloride, and the hottest acids and aggressive halogenated chemistry that destroy PTFE. Niche / very expensive builds.
Frame Sizes
10 ft, 20 ft, 30 ft, 40 ft, 45 ft. ISO 668 dimensions, intermodal compatibility, frame-class designations.
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10-Foot ISO Tank Frame (offshore / small-volume specialty)
10ft ISO tank frame outer dimensions 2,991 mm x 2,438 mm x 2,591 mm per ISO 668. Used for offshore DNV 2.7-1 rig supply (1,000 to 10,000 L), small-volume specialty cargo, and crane-lifted handling. The 4,542 L (1,000 gallon) build is the workhorse offshore type.
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30-Foot ISO Tank Frame (1CCC, bitumen / cement / EU swap)
30ft ISO tank frame outer dimensions 9,125 mm x 2,438 mm x 2,591 mm per ISO 668. Used for bitumen 30,000 L (heated bitutainer builds), cement silos, and bulk chemicals on EU intermodal routes.
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40-Foot ISO Tank Frame (1AAA, cryogenic LNG / LH2 / ethylene)
40ft ISO tank frame outer dimensions 12,192 mm x 2,438 mm x 2,591 mm per ISO 668. The standard for cryogenic LNG (45,500 L typical), LH2 (48,400 L Linde / Chart), refrigerated ethylene, liquid helium. Tare 12,500 to 13,500 kg, MGW 36,000 kg.
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20-Foot ISO Tank Frame (1AA / 1CC, the standard)
20ft ISO tank frame outer dimensions 6,058 mm x 2,438 mm x 2,591 mm per ISO 668. The standard global ocean ISO tank frame; 80%+ of the worldwide fleet. Holds T1 through T22 plus T23, T50, T75 build configurations. Capacity 14,000 to 27,500 L.
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45-Foot Intra-EU Swap Body Tank Frame (non-ISO)
45ft intra-EU swap body tank outer dimensions 13,716 mm x 2,550 mm x 2,591 mm. Width exceeds the 2,438 mm ISO 668 standard. Up to 38,000 L typical, MGW 38,000 kg. Cannot ride deep-sea container slots. Strict intra-EU road / rail / short-sea ferry use.
Loading calculator
How much can you load into this tank?
The ISO Tank Loading Calculator applies the IMDG 4.2.1.9 fill rules: thermal-expansion cap, hard ceiling 95% or 97% by hazard class, weight cap from the tank's MGW minus tare, and the 20% to 80% surge floor for tanks above 7,500 L. Inputs come from the SDS. Output names the governing constraint and flags surge violations with a recommendation. For drum / IBC / big-bag / pallet loading into 20'GP and 40'GP / 40'HC containers, see the separate Container Loading Calculator.
Open the ISO Tank Loading CalculatorRelated glossary
Background on the broader trade context. The shipping documents, classification systems, and packaging formats every ISO tank booking touches.
Sources
- IMDG Code 42-24, Chapter 4.2 (Use of Portable Tanks) and Chapter 6.7 (Construction and Testing)
- UN Recommendations on the Transport of Dangerous Goods, Model Regulations Vol II, Chapter 4.2 and Table 4.2.5.2.6
- ISO 668:2020 (Series 1 freight containers, classification, dimensions)
- ISO 1161 (corner fittings)
- ISO 1496-3:2019 (tank container specification and testing)
- ASME BPVC Section VIII Div 1 / Div 2 (pressure-vessel design)
- EN 12972 (testing, inspection, marking of metallic tanks for DG); EN 13530 (cryogenic); EN 14025 (metallic tank design)
- 49 CFR Subchapter C (US DOT, parts 172, 173, 178, 180)
- ADR (road, Europe) and RID (rail, Europe)
- DNV-ST-E271 / EN 12079 (offshore containers)
- ITCO Annual Market Report 2025 (fleet statistics)
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