Table 3 Effective Beam Width On Surface (Mm) - Olympus FlexoFORM User Manual

10-003591-01EN [Q7780031], Rev. 4, January 2020
Effective probe beam width
Table 3 on page 42 provides corrected values for probe beam width for a range of pipe
sizes and number of elements in focal laws.
It is also possible to calculate the corrected value using equation (1) on page 43. The
equation's variables are illustrated in Figure 4-5 on page 43.
Pipe OD
(in.)
1.315
1.66
1.9
2.375
2.875
3.5
4
4.5
6.625
8.625
10.75
12.75
16
22
26
30
34
38
42
48
Flat
42 Chapter 4

Table 3 Effective beam width on surface (mm)

3 elem. 4 elem.
39.5 38.8
42.6 41.9
44.3 43.6
46.9 46.1
48.8 48
50.6 49.8
51.7 50.9
52.6 51.8
55 54.1
56.3 55.4
57.2 56.3
57.8 56.8
58.4 57.4
59.1 58.1
59.4 58.4
59.6 58.6
59.7 58.8
59.9 58.9
60 59
60.1 59.1
61 60
Law aperture
5 elem. 6 elem. 7 elem.
38.2 37.5
41.2 40.5
42.8 42.1
45.3 44.6
47.2 46.4
49 48.1
50 49.2
50.9 50
53.2 52.3
54.5 53.6
55.3 54.4
55.9 54.9
56.5 55.5
57.1 56.2
57.4 56.4
57.6 56.6
57.8 56.8
57.9 56.9
58 57
28.1 57.1
59 58
8 elem.
36.9 36.2
39.8 39.1
41.4 40.7
43.8 43
45.6 44.8
47.3 46.5
48.3 47.5
49.2 48.3
51.4 50.5
52.6 51.7
53.4 52.5
54 53
54.6 53.6
55.2 54.2
55.5 54.5
55.7 54.7
55.8 54.8
55.9 55
56 55.1
56.2 55.2
57 56