Angle
Beam Inspection Calculations
When performing an angle beam
inspection, it is important to know where the sound beam is encountering
an interface and reflecting. The reflection points are sometimes referred
to as nodes. The location of the nodes can be obtained by using the
trigonometric functions or by using the trigbased formulas which
are given below.



 Nodes  surface points where sound waves reflect.
 Skip Distance  surface distance of two successive
nodes.
 Leg 1 (L_{1})  sound path in material
to 1^{st} node.
 Leg 2 (L_{2})  sound path in material
from 1^{st} to 2^{nd} node.
 q_{R}  refracted sound wave angle.




Skip Distance Formulas


Surface Distance Formulas





Leg 1 and Leg 2 Formulas





Flaw Depth (1st Leg)


Flaw Depth (2nd Leg)








