Different steps of a working site

Checking the welded joints

Before a pipeline is laid, the pipes are welded to each other manually or automatically. Every manual weld is checked separately by radiograph and some are also checked by ultrasound. Every automatic weld is checked by ultrasound and some also by radiograph. The welds are inspected under the supervision of an authorised independent inspection body.





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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.