Section 2. Sewerage of electricity

Overhead power lines with voltage above 1 kV. Crossing and approaching overhead lines with underground pipelines

Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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2.5.287. The intersection angle of 35 kV overhead lines and below with underground main and field gas pipelines, oil pipelines, oil product pipelines, liquefied hydrocarbon gas pipelines and ammonia pipelines * is not standardized.

The intersection angle of VL 110 KV and above with newly constructed underground main pipelines for the transport of flammable liquids and gases, as well as with the existing technical corridors of these pipelines, must be at least 60º.

The intersection angle of overhead lines with underground gas pipelines with an excess gas pressure of 1,2 MPa or less, non-main oil pipelines, oil product pipelines, pipelines of liquefied hydrocarbon gases and ammonia pipelines, as well as with underground pipelines for the transport of non-combustible liquids and gases is not standardized.

* Gas ​​pipelines, oil pipelines, oil product pipelines, hydrocarbon gas reduction pipelines, ammonia pipelines are hereinafter referred to as pipelines for the transport of combustibles, liquids and gases; trunk and field pipelines are hereinafter referred to as trunk pipelines.

2.5.288. Distances at the intersection, approach and parallel following of overhead lines with underground pipelines must be at least those given in Table. 2.5.40*.

In exceptional cases, it is allowed during the design process to reduce distances up to 50% (for example, when passing overhead lines through the territories of power plants, industrial enterprises, along city streets, etc.), given in paragraph 3 of Table. 2.5.40 for gas pipelines with a gas pressure of 1,2 MPa or less.

At the same time, it is necessary to provide for the protection of the foundations of the overhead line supports from their possible undermining if these pipelines are damaged, as well as protection that prevents the removal of dangerous potentials to metal pipelines.

In the regions of Western Siberia and the Far North, when running in parallel overhead lines of 110 kV and higher with technical corridors of underground main pipelines for the transport of flammable liquids and gases, the distance from the axis of the overhead line to the outermost pipeline must be at least 1000 m.

* The mutual arrangement of pipelines, their buildings, structures and outdoor installations and overhead lines that are part of the pipelines is determined by departmental standards.

Table 2.5.40. The smallest distances from overhead lines to underground networks

2.5.289. The distances from the extreme non-deflected wires of overhead lines to purge candles installed on gas pipelines with a gas pressure of more than 1,2 MPa (main gas pipelines), and to rooms with explosive zones and external explosive installations of the COP, GDS and PS should be taken both for aboveground and ground pipelines according to 2.5.285 and according to the table. 2.5.39 respectively.

2.5.290. Newly constructed underground main pipelines in areas of convergence and parallel running with overhead lines when laying them at distances less than those given in paragraph 1 of Table. 2.5.40 must have the category:

• for gas pipelines and overhead lines of 500 kV and above - at least II;
• for gas pipelines and overhead lines 330 kV and below - at least III;
• for oil pipelines and overhead lines above 1 kV - at least III.

Newly constructed underground main pipelines at the intersection with overhead lines within the protective zone of overhead lines must comply with building codes and regulations.

Newly constructed underground main pipelines laid in the regions of Western Siberia and the Far North, when crossing with overhead lines at a distance of 1000 m on both sides of the intersection, must be at least category II, and within the security zone of overhead lines of 500 kV and above -1 category.

See other articles Section Rules for the installation of electrical installations (PUE).

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