Gaseous oxygen produced to TDS 781-2016 by low-temperature rectification of air, offered in industrial and medical grades.
Specification
- Industrial oxygen: 99.7% min (first grade), 99.5% min (second grade)
- Medical oxygen: 99.5% min, odourless
- Water vapour 0.007% max (first grade), 0.009% max (second grade)
- Hydrogen 0.3% max (first grade), 0.5% max (second grade)
- Carbon dioxide 0.01% max for medical grade
Applications
Cutting and welding, metallurgy and chemical oxidation for the industrial grade; hospital and ambulance supply for the medical grade.
Loading and delivery
Filled into steel cylinders at the producing plant. Cylinder handling and return arrangements are agreed per contract.
Physical and chemical indicators
| Parameter name | Rate for the grades |
| Industrial oxygen | Medical oxygen |
| First | Second |
| 1. Oxygen volume fraction, %, min | 99,7 | 99,5 | 99,5 |
| 2. Mass water vapor concentration, %, max | 0,007 | 0,009 | 0,009 |
| 3. Hydrogen volume fraction, %, max | 0,3 | 0,5 | — |
| 4. Carbon dioxide volume fraction, %, max | Not rated | 0,01 |
| 5. Odor | Not rated | Absent |
Source: State Concern Turkmenhimiya product specification.