The IIS group has been for more than 40 years, the main reference Entity for the verification and certification of the acceptability of radiographs of welded joints of pipelines that cross or run parallel to railway lines as per national legislation D.M. 2445 of February 23, 1971 (Technical standards for pipelines transporting liquid and gas crossings and running parallel with railways and other transport lines) and national legislation D.M. of 10 August 2004 (Changes to technical standards for pipelines transporting liquid and gas crossings and running parallel with railways and other transport lines). These national regulations specifically mention the Italian Institute of Welding as an Approved Body to perform this task.

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