Different steps of a working site

Tests before commissioning

For safety reasons, several tests are performed before the pipeline is commissioned. The first test is a mechanical strength test: water is introduced into the pipeline and the pipeline is tested at a pressure that exceeds by far the maximum pressure at which natural gas will flow through the pipeline. Subsequently, a leak test is carried out: air is injected into the pipeline in order to test the welds a second time. These tests are performed under the supervision of an authorised independent inspection body. After completion of the tests, the pipeline is cleaned and dried. 



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Tips for using search operators

Use "quotation marks" to search for a series of words or a phrase in a specific order.

Boolean operators

You can find a group of words or a phrase by using the link words AND, OR and NOT:
known as Boolean operators, these words are used to combine terms in the search field.

  • AND: All the search terms must be included in the publication. Typing in Apple AND Pear will return publications containing both the word Apple and the word Pear.

     

  • OR :  At least one of the search terms must be included in the publication. Typing in Apple OR Pear will return publications containing either the word Apple or the word Pear or both.

     

  • NOT: The term preceded by NOT must not be included in the publication. Typing in Apple NOT Pear will return publications containing the word Apple but not the word Pear.