1 Scope
This European Standard specifies fundamental techniques of film and digital radiography
with the object of enabling satisfactory and repeatable results to be obtained economically.
The techniques are based on generally recognized practice and fundamental theory of
the subject.
This European Standard applies to the radiographic examination of pipes in metallic
materials for service induced flaws such as corrosion pitting, generalized corrosion
and erosion. Besides its conventional meaning, “pipe” as used in this standard should
be understood to cover other cylindrical bodies such as tubes, penstocks, boiler drums
and pressure vessels.
Weld inspection for typical welding process induced flaws is not covered, but weld
inspection is included for corrosion/erosion type flaws.
The pipes may be insulated or not, and can be assessed where loss of material due,
for example, to corrosion or erosion is suspected either internally or externally.
This part of EN 16407 covers double wall inspection techniques for detection of wall loss, including double
wall single image (DWSI) and double wall double image (DWDI).
NOTE that the DWDI technique described in this part of EN 16407 is often combined with the tangential technique covered in EN 16407‑1.
This European Standard applies to in-service double wall radiographic inspection using
industrial radiographic film techniques, computed digital radiography (CR) and digital detector arrays (DDA).