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EXPERIMENTAL RESEARCH OF HYDRAULIC PARAMETERS OF
PIPE NETWORKS WITH POLYETHYLENE AND GLASS-PLASTIC
MATERIALS IN THE DRINKING WATER SUPPLY SYSTEM OF
FERGANA CITY
D.E. Makhmudova
Tashkent architectural and construction institute,
M.M.Rustamova
Fergana Polytechnic Institute
https://doi.org/10.5281/zenodo.12783710
Abstract.
The article examines the study of hydraulic parameters of pipes
made of polyethylene and glass-plastic material in the field conditions. The
hydraulic parameters of the water flow in the pipe were determined
experimentally based on the method of the field research.
Key words:
pipes made of polyethylene and glass-plastic material;
hydraulic parameters.
Introduction.
In recent years, as a result of laying and reconstruction of
new pipes and replacement of used pipes in developed countries, the use of
polyethylene and glass-plastic material pipes in drinking water supply systems
occupies one of the main places. In light of the above the use of polyethylene and
glass-plastic pipes for the purpose of providing drinking water to consumers in
Fergana has been studied in this article.
The main part.
A total of 636 km of pipes with a diameter of 110 mm to
1000 mm serve to provide drinking water to consumers in the city of Fergana.
95% (561 km) of existing 110-200 mm distribution pipes are made of
polyethylene material, and 37% (17.1 km) of main pipes of 500 mm to 1000
mm size are made of polyethylene and glass-plastic material pipes. 81 percent
(13.8 km) of the 17.1 km long trunk pipelines are made of polyethylene and 19
percent (3.3 km) of glass-plastic material pipes.
Hydraulic parameters of pipes made of polyethylene and glass-plastic
material have been studied under the field conditions. Field experiments have
been carried out using the following method: the experiments have been carried
out on polyethylene and glass-plastic material pipes with dimensions of 500
mm, 800 mm and 1000 mm. For this purpose, calculated shears have been
selected in the parts of the pipelines without side shafts, devices that create local
resistances (shafts, valves, etc.). A line diagram of selected design shifts is
presented in Figure 1.
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Figure 1. Line diagram of the part of the polyethylene and glass-plastic
pipe system where field experiments have been conducted.
Field research has been carried out using modern equipment:
Figure 2. General view of the AFT-2000H portable device with a laser,
which makes it possible to measure the consumption of water flow in
pressure pipes in the drinking water supply system.
Field research have been carried out in March, May and November
2023.The pipeline networks where the field studies have been conducted are
presented in Figure 1. Estimated shears were determined at the points of
connection of pipes (in wells where shut-off valves are located). In order to
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determine experimentally the hydraulic parameters of the water flow in the
pipeline, based on the method of field research, it was carried out in the parts of
the pipeline network where there are no local resistances (shut-off valves,
bends, tees, etc.). Field studies (2-2) - (4-4) on a pipe with 430 p/m polyethylene
material with a size of 500 mm between calculated shears, (5-5) (6-6) on a 647
p/m polyethylene pipe with a size of 600 mm between calculated shears (6-6) in
a material pipe, (3-3) (4-4) in a 725 p/m glass-plastic material pipe with a size of
1000 mm between the calculated shears, and (4-4)-(5-5) with a size of 1000 mm
between the calculated shears in a 975 p/m glass-plastic material pipe, between
calculated shears (5-5)-(7-7) in a 1100 p/m glass-plastic material pipe with a
size of 800 mm and (7-7)-(8-8) was performed on glass-plastic material pipes
504 p/m long with a size of 600 mm between calculated shears. 5 series of
experiments have been performed in each tube.
The pipelines, which underwent field research, were reconstructed and
put into operation in 2022. It was found that the pipes had been new after visual
inspection of the field research conducted pipes and according to the opinion of
the experts of the operating organization. This situation provides a good
opportunity to study the hydraulic parameters of water flow in pipes.
As a result of conducting field research, the hydraulic parameters of water
flow in pipes made of polyethylene and glass-plastic material with a size of 500
mm, 800 mm and 1000 mm have been determined.
The results of field studies are presented in the following tables and
figures.
Table 1
The results of the experiment conducted on a 500 mm polyethylene pipe
Sashes
n
d
𝜔
X
R
y
C
(2-2)-(4-4) 0,009
0,5
0,20
1,57
0,13
0,11
88,66
Sashes
d
∆𝜌
L
𝜌
u
u
2
𝜆
(2-2)-(4-4) 0,5
4511
430
1000
1,12
1,2544 0,008363
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Figure 3. Diagram of experimental values of the geometric dimensions of
the pipe with polyethylene material and the hydraulic parameters of the
water flow in it between the calculated shears (2-2) and (4-4)
Table 2
The results of the experiment conducted on a 600 mm polyethylene pipe
Sashes
n
d
𝜔
X
R
y
C
(5-5)-(6-6) 0,0096 0,6
0,28
1,88
0,15
0,11
84,91
Sashes
d
∆𝜌
L
𝜌
u
u2
𝜆
(5-5)-(6-6)
0,6
4119 643
1000 1,12 1,2544
0,00609
0
0,5
1
1,5
2
2,5
3
3,5
4
4,5
Diameter,
∅
0,5
Pressure,
4,41 kPA
Length,
0,43 кm
Density,
1 t/m3
Speed,
1,12 m/s
Hydraulic
resistance,
0,008 koef
(2-2)-(4-4) Arithmetic shear
0
0,5
1
1,5
2
2,5
3
3,5
4
4,5
Diameter,
∅
0,6
Pressure,
4,42 kPA
Length,
0,65 кm
Density,
1 t/m3
Speed,
1,12 m/s
Hydraulic
resistance,
0,006 koef
(5-5)-(6-6) Arithmetic shear
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Figure4. Diagram of the geometric dimensions of the polyethylene
material pipe between the calculated shears (5-5) and (6-6) and the
experimental values of the hydraulic parameters of the water flow in it
Table 3
The results of the experiment conducted on a 600 mm polyethylene pipe
Sashes
n
d
𝜔
X
R
y
C
(9-9)-(10-
10)
0,0093 0,6
0,28
1,88
0,15
0,11
87,57
Sashes
d
∆𝜌
L
𝜌
u
u2
𝜆
(9-9)-(10-
10)
0,6
4511
1300
1000
1,1
1,21
0,00344
Figure 5. Diagram of the geometric dimensions of the polyethylene
material pipe and the experimental values of the hydraulic parameters of
the water flow in it between the calculated shears (9-9) and (10-10)
Table 4
The results of the experiment conducted on a polyethylene pipe of 800 mm
size
0
0,5
1
1,5
2
2,5
3
3,5
4
4,5
Diameter,
∅
0,6
Pressure,
4,451 kPA
Length,
1,3 кm
Density,
1 t/m3
Speed,
1,11 m/s
Hydraulic
resistance,
0,0034 koef
(9-9)-(10-10) Arithmetic shear
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Sashes
n
d
𝜔
X
R
y
C
(3-3)-(9-9)
0,0097 0,8
0,50
2,51
0,20
0,11
86,69
Sashes
d
∆𝜌
L
𝜌
u
u2
𝜆
(3-3)-(9-9)
0,8
4511
1300
1000
1,22
1,48
0,0037
Figure 6. Diagram of experimental values of the geometric dimensions of
the polyethylene material pipe and the hydraulic parameters of the water
flow in it between the calculated shears (3-3) and (9-9)
Table 5
The results of the experiment conducted on a 600 mm glass-plastic
material pipe
Sashes
n
d
𝜔
X
R
y
C
(7-7)-(8-8)
0,012
0,6
0,28
1,88
0,15
0,10
68,36
Sashes
d
∆𝜌
L
𝜌
u
u2
𝜆
(7-7)-(8-8)
0,6
6668
500
1000
1,32
1,74
0,0091
0
0,5
1
1,5
2
2,5
3
3,5
4
4,5
Diameter,
∅
0,8
Pressure,
4,5 kPA
Length,
1,3 кm
Density,
1 t/m3
Speed,
1,22 m/s
Hydraulic
resistance,
0,037 koef
(3-3)-(9-9) Arithmetic shear
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Figure 7. Diagram of the geometric dimensions of the glass-plastic material
pipe between the computational shears (7-7) and (8-8) and the
experimental values of the hydraulic parameters of the water flow in it
Table 6
The results of an experiment conducted on a 800 mm glass-plastic
material pipe
Sashes
n
d
𝜔
X
R
y
C
(5-5)-(7-7)
0,011
0,8
0,50
2,51
0,20
0,11
76,71
Sashes
d
∆𝜌
L
𝜌
u
u2
𝜆
(5-5)-(7-7)
0,8
6668
1100
1000
1,23
1,51
0,0064
0
0,5
1
1,5
2
2,5
3
3,5
4
4,5
Diameter,
∅
0,6
Pressure,
6,7 kPA
Length,
0,5 кm
Density,
1 t/m3
Speed,
1,32 m/s
Hydraulic
resistance,
0,0091 koef
(7-7)-(8-8) Arithmetic shear
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Figure 8. Diagram of the geometric dimensions of the glass-plastic material
pipe and the experimental values of the hydraulic parameters of the water
flow in it between the calculated shears (5-5) and (7-7)
Table 7
The results of the experiment conducted on a 1000 mm glass-plastic
material pipe
Sashes
n
d
𝜔
X
R
y
C
(4-4)-(5-5)
0,01
1
0,79
3,14
0,25
0,11
86,19
Sashes
d
∆𝜌
L
𝜌
u
u2
𝜆
(4-4)-(5-5)
1
5884
975
1000
1,24
1,54
0,0079
0
0,5
1
1,5
2
2,5
3
3,5
4
4,5
Diameter,
∅
0,8
Pressure,
6,67 kPA
Length,
1,1 кm
Density,
1 t/m3
Speed,
1,23 m/s
Hydraulic
resistance,
0,0064 koef
(5-5)-(7-7) Arithmetic shear
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Figure 10. Diagram of the geometric dimensions of the glass-plastic
material pipe between the calculated shears (4-4) and (5-5) and the
experimental values of the hydraulic parameters of the water flow in it
Table 8
The results of the experiment conducted on a 1000 mm glass-plastic
material pipe
Sashes
n
d
𝜔
X
R
y
C
(3-3)-(4-4)
0,01
1
0,79
3,14
0,25
0,11
86,19
Sashes
d
∆𝜌
L
𝜌
u
u2
𝜆
(3-3)-(4-4)
1
6374
1300
1000
1,14
1,3
0,0075
Conclusion.
1. The hydraulic parameters of the water flow in water
networks made of polyethylene and glass-plastic materials 1.7 km long
measuring 500 mm to 1000 mm in the drinking water supply system of the city
of Fergana have been experimentally studied.
2. The Shezi coefficient has been experimentally studied in water flow in
water networks made of polyethylene and glass-plastic materials 1.2 km long
measuring from 500 mm to 1000 mm. The Shezi coefficient has been
determined experimentally at different values (0.009; 0.0093; 0.0097; 0.010;
0.011) of the roughness coefficient of the inner surface of water pipes made of
polyethylene and glass-plastic materials and at different parameters of the
hydraulic radius.
0
0,5
1
1,5
2
2,5
3
3,5
4
4,5
Diameter,
∅
1
Pressure,
5,9 kPA
Length,
0,98 кm
Density,
1 t/m3
Speed,
1,24 m/s
Hydraulic
resistance,
0,0079 koef
(4-4)-(5-5) Arithmetic shear
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3. Experimental values of the coefficient of hydraulic resistance have been found
in water flow in water networks made of polyethylene and glass-plastic
materials 0.5 km long measuring from 500 mm to 1000 mm.
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4.
Сonstruction norms and regulations (CNR) 2.04.02-2019 “Water supply.
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