Instruction Manual

87
Manual Calculation of Sound Velocity
The main unit stores the sound velocity values of various pipes in its internal memory.
The built-in values cover the basic pipe materials and diameters that are used, but might not cover all the
applications that can be encountered.
In cases where the pipe conditions (material and diameter) are known but the type is not in the internal
memory, the sound velocity value of the pipe can be calculated from the outer diameter, thickness, and
Young's modulus (longitudinal elastic modulus).
Enter the necessary information on the Velocity calculation screen.
For details on velocity calculation, see "Sound Velocity Registration" under "4-7 Explanation of
Equipment Settings and Operations" on p. 40.
For the pipe type, select Metal or Non-metal.
The reason why metal and non-metal pipes are separated is that different equations are needed to calculate
the sound velocity even when the data (outer diameter, wall thickness, and Young's modulus) is the same.
Refer to the relevant specifications to obtain the outer diameter, wall thickness, and Young's modulus of
the pipe.
● The manufacturer of the pipe has the relevant data. Please refer to your local standard.
— Pipe types and Young's modulus —
Pipe material
Young's modulus
(MPa)
Pipe material
Young's modulus
(MPa)
DIP
156,906
HPPE
696
CIP
117,680
SUS
193,191
ACP
23,536
SSP
193,191
VP
3,040
CUP
124,544
LP
15,200
SGPW
210,843
PE1 (WPE50)
216
STPY
205,940
PE2 (WPE80)
804
FRPM
8,728
PE100
785
SGP-V*
205,940
* The above figures reflect FUJI TECOM's research and are given for reference purposes only.
Select Metal or Non metal, enter the outer diameter, wall thickness, and Young's modulus, and tap
Registration.
● The saved data can be recalled when the pipe data is entered later.