Industrial gases
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31.10.08
]
ARGON
Gas and liquid argon is used as a protective medium at welding, cutting, melting of active and rare metals and alloys on their basis, aluminum, aluminum and magnesium alloys, rustproof nickel-chromium alloys: high-temperature alloys and steels of various grades, and also at refinement of metals in the metallurgy branch.
It is produced by low temperature rectifications of residual gases of the production of ammonia.
MAIN TECHNICAL CHARACTERISTICS
| Main specifications | Top grade OKP code 21 1183 0120 |
1st grade OKP code 21 1483 0130 |
|---|---|---|
| Volume fraction of argon, %, no less than | 99.993 | 99.987 |
| Volume fraction of oxygen, %, no less than | 0.0007 | 0.002 |
| Volume fraction of nitrogen, %, no more than | 0.005 | 0.01 |
| Percentage by weight of steam at the temperature 20°С and pressure 101.3 кPa (760 mmHg), g/cm3, no more than |
0.007 | 0.01 |
| Volume fraction of water steam, %, no more than | 0.0009 | 0.001 |
| Volume fraction of the sum of carbonaceous compounds in calculation on СО3, %, no more than |
0.0005 | 0.001 |
Remarks:
1. Volume fraction of the sum of carbonaceous compounds is not standardized in gas and liquid argon produced from air, if electrolytic hydrogen is used for sanitation of crude argon, free of impurities of carbonaceous compounds and alkali, and also hydrogen of coke-oven gas and the synthesis of gas, which specially goes through the additional clearing on the ammoniac productions.
2. Rates for a liquid argon meet to the factors of a gas argon produced at full evaporation of a liquid argon test.
3. Quality indicators of a liquid argon should match to the rates which have been mentioned above, under a condition of decrease of quantity of a liquid argon due to its evaporation at transportation and storage no more than, than 10 % from the shipped argon.
Argon is non-toxic and inexplosive substance.
Liquid argon is a low-boiling liquid and it can cause frostbite of skin and damage of the mucous membrane of eye.
GAS AND LIQUID NITROGEN
Gas and liquid nitrogen is produced from atmosphere air by a deep chilling method, and it is used for the creation of an inert atmosphere at the production, storage and transportation of easily oxidizable products, at high-temperature processes during machining of metals, which are not interacting with nitrogen, for preservation of the closed metal vessels and the pipelines and the other purposes.
MAIN TECHNICAL CHARACTERISTICS
| Main specifications | Normal values for technical gas nitrogen | |
|---|---|---|
| 1st grade | 2nd grade | |
| Volume fraction of nitrogen, %, no less than | 99.6 | 99.0 |
| Volume fraction of oxygen, %, no more than | 0.4 | 1.0 |
| Volume fraction of water steam in gas nitrogen, %, no more than | 0.009 | Test had been passed |
| The content of oil in gas nitrogen | Test had been passed | |
| The content of oil, mechanical impurities and moisture in liquid nitrogen. | Test had been passed | |
Gas nitrogen is transported in the bottles by motor transports, and liquid is transported in the special tanks lorry, Dewar vacuum flasks, according to the transportation rules acting on the given type of transport. One should use the individual protective agents of skin and the respiratory organs at work with nitrogen. The warranty period of storage of gas nitrogen is 18 months from the manufacturing date.
SOLID CARBON DIOXIDE
Solid carbon dioxide (dry ice) (СО2) is produced from liquid or gas carbon dioxide. Solid carbon dioxide is used for the creation of low temperatures at refrigerating process, storage, transportation and the realization of frozen and refrigerated food products, and also for the technical purposes. Solid carbon dioxide is non-toxic, inexplosive substance.
MAIN TECHNICAL CHARACTERISTICS
| Main specifications | Normal values for the grade |
|---|---|
| Appearance | Blocks of white color |
| Mass fraction of carbon dioxide, % | 99.96 – 99.98 |
| The content of mineral oils | Determined by qualitative analysis |
| The content of hydrogen sulphide | Determined by qualitative analysis |
| The content of chlorhydric acid | Determined by qualitative analysis |
| The content of sulphurous and nitric acids and organic compounds (alcohols, ethers, aldehydes and organic acids) |
Determined by qualitative analysis |
| The content of ammonia and monoethanolamines | Determined by qualitative analysis |
| Odor and taste | Determined by qualitative analysis |
| The content of aromatic hydrocarbons (including benzyl) | Determined by qualitative analysis |
| Mass fraction of residue after evaporation, % | 0.02-0.04 |
Solid carbon dioxide can cause freezing injury of skin and affect the mucous membrane of eye. It is prohibited to take the substance by the unprotected arm. The product is packed into the clear isothermal containers or other isothermal containers. It is transported by all types of transports, according to the transportation rules acting on the given type of transport.
GAS AND LIQUID CARBON DIOXIDE
Gas and liquid carbon dioxide (СО2) is colorless gas or colorless liquid, with slightly sourish odor and taste. It is produced by a technical method. Carbon dioxide of all types is used for the creation of protective atmosphere at welding metals; for the food purposes in the production of carbonated drinks, dry ice, for cooling, freezing, storage of foodstuff at direct and indirect contact with it, for drying iron moulds, for fire-fighting and other purposes in all industries. It is non-toxic and nonexplosive substance.
MAIN TECHNICAL CHARACTERISTICS
| Main specifications |
Normal values for the grade | ||
|---|---|---|---|
| Top grade | 1st grade | 2nd grade | |
| Volume fraction of carbon dioxide (СО2), %, no less than | 99.8 | 99.5 | 98.8 |
| Volume fraction of carbonic oxide (CO) | Determined by qualitative analysis | ||
| Percentage by weight of mineral oils and mechanical impurities, mg/kg, no more than | 0.1 | 0.1 | Determined by qualitative analysis |
| The presence of hydrogen sulfide | Determined by qualitative analysis | ||
| The presence of chlorhydric acid | Determined by qualitative analysis | ||
| The presence of sulphurous and nitrous acids and organic compounds (alcohol, ethers, aldehydes and organic acids) | Determined by qualitative analysis | ||
| The presence of ammonia and ethanolamines | Determined by qualitative analysis | ||
| The presence of odor and taste | Determined by qualitative analysis | ||
| Mass fraction of water, %, no more than | 0.037 | 0.184 | Not standardized |
| Percentage by weight of water steams at 20°С and pressure 101.3 кPa (760 mmHg) g/m3, no more than | 0.037 | 0.184 | Not standardized |
| that corresponds to the saturation temperature of carbon dioxide steams at pressure 101.3 кPa at temperature 20°С, not above | -48 | -34 | Not standardized |
| The presence of aromatic hydrocarbons | Determined by qualitative analysis | ||
| The presence of vanadium oxides | Determined by qualitative analysis | ||
Liquid carbon dioxide in bottles is transported by railway transport in the boxcars. It is allowed transportation by the motor transports in the special containers.
TECHNOLOGICAL GAS OXYGEN
Technological gas oxygen is produced from atmosphere air by deep chilling method. This product is used to pad welding of non-ferrous metals, light alloys, for intensification of metallurgical processes and other purposes. Gas oxygen is colorless gas, without odor and taste and it keeps combustion.
MAIN TECHNICAL CHARACTERISTICS
| Main specifications | Normal values for the grade |
|---|---|
| Volume fraction of oxygen, %, no less than | 95 |
| Volume fraction of hydrogen, %, no more than | 0.7 |
| Percentage by weight of water steams in g/m3 for the normal conditions (20°С, 760 mmHg) | 0.07 |
Transportation is carried out by all types of transport, according to the transportation rules of hazardous materials, acting on this type of transport. The warranty period of storage of oxygen is 12 months from the manufacturing date.
TECHNICAL LIQUID OXYGEN
Technical liquid oxygen is produced from atmosphere air by deep chilling method. Technical liquid oxygen is used for a flame processing of metals and other technological purposes.
MAIN TECHNICAL CHARACTERISTICS
| Main specifications | Normal values for the grade |
|---|---|
| Volume fraction of oxygen, %, no less than | 99.5 |
| The content of acetylene | None |
| Volume of carbon dioxide in 1 dm3 of liquid oxygen, at 20°С and 101.3 кPa (760 mmHg), cm3, no more than |
3.0 |
| The content of oil | None |
| The content of carbonic oxide | not standardized |
| The content of gas acids and the bases | not standardized |
| The content of ozone and other gases - oxidizing agents | not standardized |
| Moisture content and other mechanical impurities | Test should be passed |
| Odor | not standardized |
Liquid oxygen is non-toxic, noncombustible and nonexplosive substance, however, it is a strong oxidizing agent, and it sharply increases the burning ability of other materials. Technical gas oxygen is transported in the special tanks by all types of transports according to the transportation rules for the hazardous materials acting on the transport of the given type.