Non-standard Specification Tank Containers for Special Chemicals, Liquid Waste Tank and T50 Gas Tank
Where an estimated 90% of all hazardous bulk chemicals, may be transported in multi-purpose tank containers, UN Portable tank type T11, the balance are likely cargoes whose properties and characteristics require specialized tank containers with unit types T14 –T22. This is because of variety of factors. From the cargo density which can be expected to be above 1.0kg/litre to chemical composition and their primary and secondary hazards that finally determines its UN Portable unit type under IMDG. Broadly we are able to divide these cargoes into four classes that sees the most high hazard cargoes transported in UN Portable tank unit types T14-T22.

Hydrogen Peroxide Tank – 10 inch Bursting Disc
- Class 4 Flammable solids
- Class 5 – Oxidizing substances and organic peroxides.
- Class 6 Toxic and infectious substances
- Class 8 Corrosive substances
The specification of such tank containers, invariably includes facilities and special features different from those found on standard specification tank containers. Take hydrogen peroxide under class 5.1. The specification of such tank containers of UN Portable tank type, T14, which means discharge is affected via the top, will include special pressure relief devices including 250mm diameter bursting disc and a breather with porous disc.

Hydrogen Peroxide Tank – Manlid Compartment
“Made to measure’’ Special purpose signature tank containers.
Made to measure specification tank containers are those that suit special conditions mostly related to the cargo, its density, corrosive properties, toxicity or perhaps a high heat melting point? In other instances it could be the area of operation. Example: phthalic anhydride, it is a class 8 cargo UN 2214. Besides a density of 1.53kg/litre what stands out besides this is its melting point of 132˚C. We refer to these cargoes as high heat cargoes. Here the answer is a small capacity not exceeding 20,000litre of a design that is able to tolerate dilation of vessel in excess of 5.0mm. Furthermore the specification has to include super insulation, effective steam heating area of not less than 10meter square and steam traced bottom valves. Other cargoes that represent similar challenges are molten Sulphur and Caprolactam.
UN Portable tank T50 series Built for Anhydrous Ammonia MAWP 22.0 Bar. Capacity 24,600lt.
Double Wall-secondary containment Iso tank containers that meet UL 142-ULC142
An example where area of operation typically requires a ‘’made to measure design” approach are tank containers purpose designed with build double wall-otherwise referred to as secondary containment designed and build according UL142 and ULC142 that cover horizontal atmospheric type steel tanks for the storage aboveground of flammable and combustible liquids. These tanks are mostly deployed for stationary installations as covered by the Flammable and Combustible liquids code of the National Fire protection association, NFPA.
Sodium Cyanide Tank Container
The precious metals mining industry is the world’s main cyanide consumer. Here, sodium cyanide has vied as the most efficient and cost-effective complexing agent for dissolving finely distributed microscopic and sub-microscopic gold and silver particles from the ore.
The Process in brief:
Sodium Cyanide is loaded into the tank container via three top manholes as a dry material before water is piped in via the side water inlet to dissolve the sodium cyanide. The side bottom outlet has a drain filter to avoid undissolved sodium cyanide getting caught up in the flow during discharge. This sodium cyanide solution will ultimately be used in the mining process. The final goal of this process is the extraction of gold and silver.
In consideration of the severe toxicity of sodium cyanide is essential to ensure any dust emissions of dust in the atmosphere are avoid, equally all necessary steps must be taken to avoid any spillage of dissolved sodium cyanide.
Tank Container for Nitric Acid Above 70%
Nitric acid >70% applications
The most important industrial use of nitric acid is the preparation of the salt ammonium nitrate, NH4NO3, which is used in the manufacture of fertilizers and explosives. In fact, more than 80% of the nitric acid produced annually is devoted to the preparation of fertilizers.
Among the many important reactions of nitric acid are neutralization with ammonia to form ammonium nitrate, a major component of fertilizers; nitration of glycerol and toluene, forming the explosives nitroglycerin and trinitrotoluene (TNT). Nitroglycerin (the explosive component of dynamite) is made by adding nitric and sulphuric acids to glycerol under very carefully controlled conditions.
Nitric acid is an oxidizer, when carried in a stainless steel tank container, purging air from the tank container will not stop the stainless steel from getting corroded because Nitric acid contains its own oxygen. Nitric acid reacts violently with many non-metallic compounds, and some reactions may result in explosions.
High concentration Nitric acid is incompatible with most materials, tank material, seals, gaskets, and linings. For seals and linings, only PTFE will b resistant.
For tank shell material special grade steel Uranus S1 stainless steel and aluminum lined tank containers have adequate resistant.
Special tank containers for toxic and corrosive chemicals
UN No. |
PG |
Product Name |
Specific Gravity |
Min. Required Unit Type (IMDG) |
Proposed Unit Type |
Capacity (Ltrs) |
Spec. Provisions |
Type Discharge |
Type of Manlid |
2031 |
I |
Nitric Acid > 70% |
1.51 |
T10 |
T14 |
21,000 |
TP2/33 |
Top |
Pendle |
1689 |
I |
Sodium Cyanide |
1.6 – 1.62 |
T6 |
T6 |
26,000 |
TP33 |
Bottom |
Pendle |
2927 |
II |
2-Ethyl Hexanoyl Chloride |
0.939 |
T11 |
T11 |
24,000 |
TP2/27 |
Bottom |
Pendle |
3390 |
I |
4-Chloro Butyryl Chloride |
1.257 |
T20 |
T20 |
17,500 to 21,000 |
TP2/13 |
Top |
Bolted |
1553 |
I |
Arsenic Acid 75% |
1.73-1.884 |
T20 |
T20 |
14,300 |
TP2/7/13 |
Top |
Bolted |
2226 |
II |
Benzotrichloride |
1.38 |
T7 |
T14 |
16,000 |
TP2 |
Top |
Bolted |
1738 |
II |
Benzyle Chloride |
1.1 |
T8 |
T14 |
23,000 |
TP2/13 |
Top |
Bolted |
1131 |
I |
Carbon Disulphide |
1.26 |
T14 |
T14 |
21,000 |
TP2/7/13 |
Top |
Bolted |
1824 |
III |
Caustic Soda |
1.48 |
T4 |
T11 |
17,500 |
TP1 |
Bottom |
Pendle |
3082 |
III |
Cetyl Chloride |
0.865 |
T4 |
T11 |
24,000 to 25,000 |
TP2/29 |
Bottom |
Pendle |
1752 |
I |
Chloro Acetyl Chloride |
1.418 |
T20 |
T20 |
16,000 |
TP2/13/35 |
Top |
Bolted |
2927 |
I |
Chloropivaloyl Chloride |
1.199 |
T14 |
T14 |
21,000 |
TP2/13/27 |
Top |
Bolted |
1754 |
I |
Chlorosulphonic Acid |
1.76 |
T20 |
T20 |
14300 to 17,500 |
TP2 |
Top |
Bolted |
2920 |
II |
Cyclopropane Carboxylic Acid Chloride |
1.15 |
T11 |
T11 |
21,000 |
TP2/27 |
Bottom |
Pendle |
3265 |
II |
Decanoyl Chloride |
0.919 |
T11 |
T11 |
24,000 to 25,000 |
TP2/27 |
Bottom |
Pendle |
1184 |
II |
Diethylene Glycol Dichloride |
1.28 |
T7 |
T11 |
21,000 |
TP1 |
Bottom |
Pendle |
1595 |
I |
Dimethyl Sulphate |
1.328 |
T20 |
T20 |
16,000 |
TP2/13/35 |
Top |
Bolted |
1196 |
II |
Ethyltrichlorosilane 98% |
1.238 |
T10 |
T14 |
21,000 |
TP2/7/13 |
Top |
Bolted |
2395 |
II |
ISO Butyryl Chloride |
1.02 |
T7 |
T11 |
24,000 to 25,000 |
TP2 |
Bottom |
Pendle |
2927 |
I |
Isononanoyl Chloride |
0.93 |
T14 |
T14 |
24,000 to 25,000 |
TP2/13/27 |
Top |
Pendle |
3261 |
III |
Isophthaloyl Chloride |
1.388 |
T1 |
T11 |
17,500 to 21,000 |
TP33 |
Bottom |
Pendle |
2924 |
II |
ISO Valeryl Chloride |
0.989 |
T11 |
T11 |
24,000 to 25,000 |
TP2/27 |
Bottom |
Pendle |
3246 |
I |
Methanesulfonyl Chloride |
1.474 |
T14 |
T14 |
16,000 |
TP2/13 |
Top |
Bolted |
2920 |
II |
Methoxy Acetyl Chloride |
1.19 |
T11 |
T11 |
21,000 to 24,000 |
TP2/27 |
Bottom |
Pendle |
2644 |
I |
Methyl Iodide |
2.2 |
T20 |
T20 |
14,300 (Baffles as Option) |
TP2/13/37 |
Top |
Bolted |
1127 |
II |
N-Butyl Chloride |
0.8862 |
T4 |
T11 |
24,000 to 25,000 |
TP1 |
Bottom |
Pendle |
2353 |
II |
N-Butyryl Chloride |
1.018 |
T8 |
T14 |
24,000 to 25,000 |
TP2/13 |
Top |
Pendle |
2502 |
II |
N-Valeroyl Chloride |
0.995 |
T7 |
T11 |
24,000 to 25,000 |
TP2 |
Bottom |
Pendle |
2927 |
II |
Neo Decanoyl Chloride |
0.95 |
T11 |
T11 |
21,000 to 24,000 |
TP2/27 |
Bottom |
Pendle |
1831 |
I |
Oleum 25% |
1.935 |
T20 |
T20 |
14,300 to 16,000 |
TP2/13 |
Top |
Bolted |
1831 |
I |
Oleum 65% |
1.935 |
T20 |
T20 |
14,300 to 16,000 |
TP2/13 |
Top |
Bolted |
1805 |
III |
Phosphoric Acid 55-95% |
1.69 |
T4 |
T11 |
16,000 |
TP1 |
Bottom |
Pendle |
1810 |
II |
Phosphorous Oxychloride |
1.675 |
T7 |
T20 |
14,300 |
TP2 |
Top |
Bolted |
1809 |
I |
Phosphorous Trichloride |
1.57 |
T20 |
T20 |
14,300 |
TP2/13/35 |
Top |
Bolted |
2438 |
I |
Pivaloyl Chloride |
0.979 |
T14 |
T14 |
24,000 |
TP2/13 |
Top |
Bolted |
1818 |
II |
Silicon Tetra Chloride |
1.52 |
T10 |
T14 |
14,300 to 16,000 |
TP2/7/13 |
Top |
Bolted |
1824 |
III |
Sodium Hydroxide |
1.48 |
T4 |
T11 |
17,500 |
TP1 |
Bottom |
Pendle |
1754 |
I |
Sulphonic Acid |
1.75 |
T20 |
T20 |
14,300 |
TP2 |
Top |
Bolted |
1828 |
I |
Sulphur Dichloride |
1.69 |
T20 |
T20 |
14,300 to 16,000 |
TP2 |
Top |
Bolted |
1830 |
II |
Sulphuric Acid 98% |
1.84 |
T8 |
T14 |
14300 to 17,500 |
TP2 |
Top |
Bolted |
1836 |
I |
Sulphur Monochloride |
1.68 |
T10 |
T20 |
14,300 to 16,000 |
TP2/13 |
Top |
Bolted |
1829 |
I |
Sulphur Trioxide |
1.882 |
T20 |
T20 |
14,300 to 17,500 |
TP4/13/25/26 |
Top |
Bolted |
1759 |
II |
Terephthaloyl Chloride |
1.34 |
T3 |
T11 |
17,500 to 21,000 |
TP33 |
Bottom |
Pendle |
1836 |
I |
Thionyl Chloride |
1.64 |
T10 |
T14 |
14,300 to 16,000 |
TP2/13 |
Top |
Bolted |
1837 |
II |
Thiophosphoryl Chloride |
1.668 |
T7 |
T14 |
14,300 |
TP2 |
Top |
Bolted |
1838 |
I |
Titanium Tetra Chloride |
1.762 |
T20 |
T20 |
14,300 |
TP2/13/37 |
Top |
Bolted |
1295 |
I |
Trichlorosilane |
1.34 |
T14 |
T14 |
16,000 |
TP2/TP7/TP13 |
Top |
Bolted |
2810 |
I |
Tri Ethylene Glycol Dichloride |
1.197 |
T14 |
T14 |
21,000 to 24,000 |
TP2/13/27 |
Top |
Pendle |
2810 |
II |
Tri Ethylene Glycol Dichloride |
1.197 |
T11 |
T11 |
21,000 to 24,000 |
TP2/13/27 |
Bottom |
Pendle |
2810 |
III |
Tri Ethylene Glycol Dichloride |
1.197 |
T7 |
T11 |
21,000 to 24,000 |
TP1/28 |
Bottom |
Pendle |
1381 |
I |
Yellow Phosphorous |
1.8 |
T9 |
T20 |
14,300 |
TP3/31 |
Top |
Bolted |
Disclaimer
This list contains data that amongst other points to the minimum required UN unit type and alternate unit types that Tankformator may offer for sale from time to time subject to availability. It is important that the list is read judiciously and it should be remembered that it is meant as no more than a commercial guide and should not be misconstrued and viewed as being the final touchstone before committing any containers to any operation.