The process of construction of a gas pipeline as per the special purpose Gas Act

  • DESIGNING the gas pipeline route while taking into account safety, formal and legal, environmental, and technical requirements
  • ADMINISTRATIVE DECISIONS, OPINIONS, ARRANGEMENTS – obtained from competent administrative bodies, e.g., the Voivode shall issue a decision on determining the location of investments in terms of the terminal, the so-called “location decision”
  • CONSTRUCTION AND BUILDING PERMIT – based on the building permit decision, the Contractor selected by GAZ-SYSTEM shall perform construction works within the premises of the property covered by the location decision
  • COMPENSATION payable based on an administrative decision issued by the Voivode.

How does the construction of the gas pipeline look like?

The following represents the most important stages and an example of how to organise a construction process:

1. Geodetic survey and route planning:

  • determining the exact course of the pipeline axis, designating the construction lane and potential collision sites with roads, railways etc., by means of posts

2. Removing vegetation and removing the layer of humus:

  • ridding the construction lane of trees, bushes, and any other identified objects hindering the performance of works;
  • removing topsoil (approx. 0.3 m) – building an embankment;
  • levelling the ground to facilitate the movement of construction machinery.

3. Positioning pipes along the route:

  • transport of pipes previously stored on storage yards around the construction site and laying them close to the pipeline line;
  • fitting the transported pipes on-site to the designed route profile.

4. Welding of pipes and digging a trench:

  • welding of laid and properly bent pipes while leaving space enabling traffic of construction machines;
  • inspection of welds and binders, ultrasonic/radiographic control aimed to ensure the highest quality of pipe connections;
  • digging a trench enabling to lay the pipeline on an appropriate depth that allows covering it with at least 1.2 m layer of soil, counting from the top wall of the pipe;
  • cleaning the trench of stones and other obstacles (roots) – making a sand ballast.

5. Laying the gas pipeline in the trench:

  • laying the pipeline in a continuous manner, while using about 3-6 so-called side cranes;
  • the already welded pipe is moved along special cradles equipped with rollers;
  • as-built survey of welded and laid parts of the pipeline before backfilling;
  • backfilling the laid pipeline with sand and then with natural soil previously extracted from the trench – securing the so-called insulating coating with the so-called soft soil; the use of excess soil.

6. Bringing back the area to its original condition:

  • restoring the initial lay of the land and protection against erosion;
  • restoring the natural soil layer – distribution of humus within the construction zone;
  • biological restoration, among others, consisting in sowing the area with a grass mixture (after prior agreement of the scope of work with the owners of plots).

7. Marking the gas pipeline route:

  • marking with posts, which will remain the only trace of the pipeline route between subsequent ground objects (ZZU).

8. Performing tests, technical acceptance and commissioning:

  • obtaining an administrative decision regarding the operating permit and formal commissioning of the gas pipeline.

In pursuit of the Regulation of the Minister of Economy on technical conditions to be met by gas networks and their location (Journal of Laws of RP of 2013, item 640), for the high-pressure pipeline – during the entire period of exploitation thereof – a control zone lane will be established with a width of 6.0 m on each side of the gas pipeline axis (12 meters in total), which gives rise to certain restrictions for Landlords, Land Users.

In the controlled zone one should not:

  • erect construction objects within the meaning of the construction law,
  • arrange permanent storage rooms and warehouses,
  • undertake actions that may cause damage to the gas pipeline.

In the controlled zone, neither must trees grow within the distance shorter than 3 m, counting from the gas pipeline axis to the tree trunks, and any work may only be carried out after prior agreement with GAZ-SYSTEM S.A.

There are obstacles to agricultural activity and continuation of cultivation in the control zone, i.e., sowing and harvesting, after the construction phase has been completed, as well as after the area has been brought back to its original condition.

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