Olympus FlexoFORM - Table 3 Effective Beam Width on Surface (MM)

10-003591-01EN [Q7780031], Rev. 4, January 2020
Chapter 442
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.
Table 3 Effective beam width on surface (mm)
Pipe OD
(in.)
Law aperture
3 elem. 4 elem. 5 elem. 6 elem. 7 elem. 8 elem.
1.315 39.5 38.8 38.2 37.5 36.9 36.2
1.66 42.6 41.9 41.2 40.5 39.8 39.1
1.9 44.3 43.6 42.8 42.1 41.4 40.7
2.375 46.9 46.1 45.3 44.6 43.8 43
2.875 48.8 48 47.2 46.4 45.6 44.8
3.5 50.6 49.8 49 48.1 47.3 46.5
4 51.7 50.9 50 49.2 48.3 47.5
4.5 52.6 51.8 50.9 50 49.2 48.3
6.625 55 54.1 53.2 52.3 51.4 50.5
8.625 56.3 55.4 54.5 53.6 52.6 51.7
10.75 57.2 56.3 55.3 54.4 53.4 52.5
12.75 57.8 56.8 55.9 54.9 54 53
16 58.4 57.4 56.5 55.5 54.6 53.6
22 59.1 58.1 57.1 56.2 55.2 54.2
26 59.4 58.4 57.4 56.4 55.5 54.5
30 59.6 58.6 57.6 56.6 55.7 54.7
34 59.7 58.8 57.8 56.8 55.8 54.8
38 59.9 58.9 57.9 56.9 55.9 55
42 60 59 58 57 56 55.1
48 60.1 59.1 28.1 57.1 56.2 55.2
Flat 61 60 59 58 57 56