Inspections of natural gas and biogas pipelines

A natural gas pipeline that has required a construction permit must undergo a commissioning inspection before commissioning and then a periodic inspection every eight years. Usually, the installation company or developer orders the commissioning inspection of the natural gas pipeline, and the operator orders the periodic inspection of the pipeline.

According to their purpose, natural gas pipelines are divided into transmission pipelines, distribution pipelines and service pipelines. Natural gas transmission and distribution pipelines always require a construction permit. A construction permit is required for the operating pipeline when the target’s fuel power is at least 1.2 MW. A construction permit is not required for the service piping if the fuel power is less than 1.2 MW and the maximum permitted operating pressure of the service piping is a maximum of 0.5 bar or the nominal size of the piping is a maximum of DN 25. The construction permit can also be regional, in which case it is possible to manufacture distribution pipelines of less than 8 bar and related service pipes with a fuel power of less than Up to 6 MW applications.

Commissioning check

The commissioning inspection checks that the natural gas pipeline complies with the applicable regulations and the conditions set in the construction permit. It checks the placement, structure and readiness of the pipeline. The commissioning inspection must be carried out during construction so that the natural gas pipeline can be inspected in all aspects either once or in several parts.

Periodic inspections

A natural gas pipeline that has required a commissioning inspection must also undergo a periodical inspection every eight years. In the periodic inspection of the natural gas pipeline, it is checked that the pipeline has been maintained in accordance with the applicable regulations and that the pipeline and related equipment and structures are in working order.

Flexible service

Insteam Oy is an inspection facility approved and supervised by the Finnish Safety and Chemicals Agency for commissioning and periodical inspections of natural gas pipelines. We carry out inspections expertly and flexibly according to the client’s schedule.