Hertz HDD 75 - OPERATION

TRANSPORTATION, HANDLING, INSTALLATION
37
➢ The valves, reducers, elbows, T-bar etc. used in the air installation result in pressure loss in the
products. Hence, your design of installation must take into account the pressure loss of each
connection element. In this context, you can see at the following table of equivalent pipe lengths how
many meters of pipe are approximately needed for each element.
Table 5 Schedule of Equivalent Pipe Lengths
Example : Using the same installation, for which the pipe length was found to be 328 ft in the first
formula, when you use 8 pieces of elbows of the same internal diameter of 1'' , and 6 pieces of Tbar, and 2
pieces of stop valves, to keep the pressure loss at the same level, you can use the
following formula:
(8x0.98) + (6x6.56) + (2x0,98) =49.82ft, and 328 – 49.82 = 278.18 foot maximum pipeline, using the above
components.
Equivalent Pipe Lengths Schedule
Pipe Internal Diameter (inches)
TYPE
1''
1 1/2''
2''
3''
4''
5''
6''
Stop Valve
0.98
1.64
2.29
3.28
4.92
6,56
8.20
Angled Elbow
4.92
8.2
11.48
16.4
22.96
32.8
49.2
Elbow
0.984
1.64
1.968
3.28
4.92
6.56
8.2
Large Elbow
0.492
0.82
0.984
1.64
2.624
3.28
4.92
T-bar
6.56
9.84
13.12
22.96
32.8
49.2
65.6
Reducer
1.64
2.296
3.28
6.56
8.2
11.48
13.12