• Sodium Cyanide Tank – Diagonal View From Front

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

Hydrogen Peroxide Tank – 10 inch Bursting Disc

  1. Class 4 Flammable solids                  
  2. Class 5 – Oxidizing substances and organic peroxides.
  3. Class 6 Toxic and infectious substances
  4. 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

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.

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.

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