10-003591-01EN [Q7780031], Rev. 4, January 2020
Chapter 440
Figure 4-3 Scan pattern for a pipe elbow
4.2.2 Inspecting a Part without Marked Scan Lines
As an alternative to marking scan lines along the full length of your scan, you can
make small starting marks on the pipe on which to align before a scan motion.
However, your scan overlap value must be large enough to compensate for the
scanner tracking error (its deviation from a straight path). For scanning procedure
details, see “To inspect a part using marked scan lines” on page 38, which is similar
except for the starting marks.
To inspect a part without marked scan lines
1. Align the FlexoFORM scanner on the zero position (line around the pipe
circumference) using the alignment marks on the sides, between the wheels.
2. Use a pen to make a mark on the pipe at probe element 1 (see Figure 4-4 on
page 41) and another mark at element 64. (Offset the marks towards the center of
the scanner by an amount that corresponds to the overlap value.)
Zero position
(line perpendicular
to pipe)
Index axis
Scan axis
Keep FlexoFORM scanner
orientation the same and
return it to zero at the
center of each scan line.
1. Align on zero position.
2. Press Play on OmniScan.
4. Press button, then
move (c) to zero.
3. Scan (a and b).
6. Press
button.
(Go to 3.)
5. Index.
(a)
(b)
(c)
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