| 1 | The transmission and distribution of natural gas and natural gas distribution network from the source to the consumer | |
| 2 | Gas pipelines construction, startup activities, excavations necessary equipment, other infrastructure transitions | |
| 3 | Steel distribution line network | |
| 4 | Identification of the source and record-steel welders and welding production lines and test control 1. Source selection 2. Non-destructive testing methods and electrodes (NDT) 3. Hydrostatic testing | |
| 5 | Polyethylene pipes | |
| 6 | Specifications and standards of polyethylene pipes | |
| 7 | Polyethylene pipes and mounting | |
| 8 | Polyethylene network service line | |
| 9 | Polyethylene pipe welding | |
| 10 | Regulators pressure reduction and metering stations | |
| 11 | Regulators pressure reduction and metering stations | |
| 12 | Valves and valve chambers | |
| 13 | Scenting process, testing and commissioning | |
| 14 | Corrosion and Cathodic Protection | |