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close this bookResidential and Non-Residential - Drinking water installations and drainage requirements in Nepal (MTC - SKAT, 1988, 188 p.)
close this folderPART 2 - DRAINAGE REQUIREMENTS
View the document1. SCOPE
View the document2. FIELD OF APPLICATION
View the document3. TERMS AND DEFINITIONS
View the document4. PRINCIPLES OF INSTALLATION
View the document5. PRINCIPAL REQUIREMENTS FOR PARTS OF PIPELINE
View the document6. PRINCIPAL REQUIREMENTS FOR DRAINAGE APPLIANCES
View the document7. PRINCIPLES FOR THE PLANNING AND FITTING OF DRAINAGE PIPES
View the document8. SANITARY APPARATUS (Fixture, Appliance)
View the document9. VENTILATION
View the document10. RAIN WATER
View the document11. MATERIALS
View the document12. PRINCIPLES OF CALCULATION
View the document13. DIMENSIONING
View the document14. INSPECTION AND TESTING

13. DIMENSIONING

13.100

PRINCIPLES


Decisive for the dimensioning of parts of arrangements and systems are the principles explained in the chapter: “Principles of Calculation”,

13.200

ARRANGEMENTS OF PARTS AND SYSTEMS


Systems and arrangements of parts are separately treated according to their dimensions as follows:



- connector pipes



- branch pipes



- leader with leader vent (stack with stack vent)



- leader with leader vent and indirect side vent



- leader with secondary vent



- vent pipe



- ground pipelines and collector pipelines

13.300

NOMINAL SEWERAGE VALUE (SV).

Of drainage appliances and for the dimensioning of their connector pipes.

SV


Minimal inner diameter
in mm


Drainage device with relevant siphon

Connector
pipe

Connector
and branch
pipe, 2)

Siphon exit
& connection
(excl. self-
siphonage
apparatus)



0.5

Handwashbasin i.d. 44

44




Washbasin





Bidet





Service sink, at schools





Washsink, up to 3 taps





Domestic centrifuge



32


Shower tray, without stopper

57

44 or 50

outside 40

1.0

Bathtub





Combitub





Feet sink, up to 5 taps





Shower tray, with stopper





Washsink, 4 to 10 taps





Urinals (connector 40/45 mm)





Kitchen sink (cement, metal)





Double kitchen sink (cement, metal)





Dish washing machine





Wash fountain, 6-10 taps





Laundry sink





Washing machine, up to 6 kg



50


Floor drain, i.d. 60 mm

57

44 or 50

57

105

Large-sized bathtub





Laboratory tub





Washing machine, 7 -12 kg





Dish washing machine for





commercial use, 1)





Floor drain, i.d. 70 mm

69

50

57

2.5

Water closets, all types





Service sink/wall types





(faeces, scrub/floor water)





Service sink/standing type





(faeces, scrub/floor water)





Floor drain, i.d. 80 to 100 mm





Washing machine, 13 to 40 kg





Bed pan cleaning device (hospital)

100

50

80

1)

For the definative decision of the S-value the effective pump drainage accumulation respectively, is decisive.

2)

The vertical pipelines of collected connector vent pipelines and branch vent pipelines are dimensioned as of table: “side vent”.

3)

Exceptions are siphons of ceramic make.

4)

Horizontal connector pipelines, i.d. 44 up to max. 2 meters,


with maximum one change in direction up to 45°, excl. apparatus connector elbow.

13.400

Dimensioning tables for soil and/or waste water system

13.410

Leaders (stacks), Main vent system.

stack

max. permitted numbers

permitted loading


SV

WC


i.d.
in mm

Total

largest single SV

Total

per storey

Vs(l/s)

57

3-1)

1.0

--

--

1.3

69

7

1.0

--

--

2.0

80

20

1.5

--

--

3.0

100

70

2.5

14

6

4.2

118

100

2.5

20

7

5.0

125

150

-

30

10

6.1

150

400

-

80

22

10.0

1) max. 2 apparatus at 1 SV.

0.5 S - VALUE

1.0 S - VALUE

2.5 S - VALUES

13.420

Branch- and connector pipes, without secondary vent.

i.d
in mm

max. permitted numbers
SV

largest single
SV

50

1

0.5

57

2

1.0

69

3 - 1)

1.5

80

6

1.5

100

15

2.5

1) max. 1 apparatus at 1.5 SV.

13.430

Branch- and connector pipes, with secondary vent.

i.d
in mm

max. permitted numbers
SV

largest single
SV

vent pipe
in mm

50

2

0.5

44 or 50

57

3 - 1)

1.0

44 or 50

69

4.5

1.5

50

80

9

1.5

50

100

25

2.5

50

1) max. 2 apparatus at 1 SV.

13.500

Soil and/or waste water leaders (stacks) with direct and indirect side vent system.

i.d.
in mm

max. permitted numbers

Vs-1)
permitted
[1/s]

side
vent
i.d.
in mm



WC




Total

Total

per storey



80

64

---

---

4.2

57

100

150

30

6

5.9

80

118

200

40

7

7.0

80

125

300

60

10

8.5

80

150

800

160

20

14.0

100

1) Vs permissible values as compared to 13.410 increased by 80%

2) The connection of the side vent with the stack is to be made of the same dimension as the side vent.

13.600

Soil and/or waste water leaders (stacks) having secondary vents connected.

i.d.
in mm

max. permitted numbers


Vs-1)
permitted
[1/s]

side
vent
i.d.
in mm


SV
Total

WC
Total

per
storey



80

100

--

--

5.4

57

100

240

50

8

7.6

80

118

300

75

10

9.0

80

125

500

100

15

11.0

80

150

1200

260

30

18.0

100

1) Vs permissible values as compared 13.410 increased by 80%

13.700

Collector pipeline and ground pipeline

V permitted in l/s (as of Prandtl-Colebrook) -1)

i.d.
in mm

slope in % -3)

i.d.
in mm


1

1.5

2

3

4

5


80

2.8

3.4

4.0

4.9

5.6

6.3

80

100-2)

5.0

6.2

7.2

8.9

10.2

11.5

100-2)

118-2)

8.0

9.8

11.3

13.9

16.0

17.9

118-2)

125

9.2

11.3

13.1

16.0

18.6

20.8

125

150

15.0

18.4

21.3

26.1

30.2

33.8

150

187

27.0

33.1

38.1

47.0

54.3

60.8

187

200

32.3

39.7

45.8

56.2

64.9

72.6

200

250

58.4

71.7

82.8

101.6

117.3

131.2

250

300

94.7

116.2

134.2

164.6

190.6

212.6

300

1) For all pipe materials; after Prandtl-Colebrook:

Operation roughness kb = 1.0 mm
Kinetic velocity g (ny) = 1.3 x 106 m2/s
Filling relation h/di = 0.8

2) Minimal inner diameter of ground pipelines = 100 mm Æ
Where WC are connected, suggested to be min. = 118 mm Æ

3) Optimal slope is 3% - to be maintained where possible.

13.800

DIMENSIONING OF VENT PIPES

13.810

Maximum length - Maximum effective length of a loop pipe from the axis of the first bend over the top-most apparatus connector: 100 times i.d.


Deductions for:


- Bends 15° - 60° 5 times i.d.


- Bends 75° - 88.5° & branches 10 times i.d.



Figure

13.820

Collector vent pipes - Where for compelling reasons a collector vent pipe cannot be avoided, it will be equally dimensioned as leaders with relevant total loadings (table 13.410), and with the reservations mentioned in fig. 13.810.

13.830

Connection of pumped pressure pipelines - When connecting pumped pressure pipelines to collector pipelines or to ground pipelines, the following regulations apply: The dimension of the collector or ground pipelines will be determined by calculating the total of Vs + Vp, after the table 13.700.



Vs = Volume flow of several drainage appliances



Vp = Volume of pumped water


The inlet of a pumped pressure pipeline normally requires an enlargement of the collector or ground pipeline by one dimension up to max. i.d. 150 mm.