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L: longitud de la tubería

Q: caudal

D: diámetrog

Cf: factor de conversión

 

 

CARACTERÍSTICAS

 

 

FACTORES (C) PARA DIFERENTES TIPOS DE TUBERIAS

 

FACTOR-C PARA DIFERNTES DIAMETROS

TIPO DE TUBERIA

1.0 in.
(2.5 cm)

3.0 in.
(7.6 cm)

6.0 in.
(15.2 cm)

12 in.
(30 cm)

24 in.
(61 cm)

48 in.
(122 cm)

Uncoated cast iron - smooth and
new

 

121

125

130

132

134

Coated cast iron - smooth and
new

 

129

133

138

140

141

30 years old

 

 

 

 

 

 

Trend 1 - slight attack

 

100

106

112

117

120

Trend 2 - moderate attack

 

83

90

97

102

107

Trend 3 - appreciable
attack

 

59

70

78

83

89

Trend 4 - severe attack

 

41

50

58

66

73

60 years old

 

 

 

 

 

 

Trend 1 - slight attack

 

90

97

102

107

112

Trend 2 - moderate attack

 

69

79

85

92

96

Trend 3 - appreciable
attack

 

49

58

66

72

78

Trend 4 - severe attack

 

30

39

48

56

62

100 years old

 

 

 

 

 

 

Trend 1 - slight attack

 

81

89

95

100

104

Trend 2 - moderate attack

 

61

70

78

83

89

Trend 3 - appreciable
attack

 

40

49

57

64

71

Trend 4 - severe attack

 

21

30

39

46

54

Miscellaneous

 

 

 

 

 

 

Newly scraped mains

 

109

116

121

125

127

Newly brushed mains

 

97

104

108

112

115

Coated spun iron - smooth and
new

 

137

142

145

148

148

Old - take as coated cast iron
of same age

 

 

 

 

 

 

Galvanized iron - smooth and
new

120

129

133

 

 

 

Wrought iron - smooth and new

129

137

142

 

 

 

Coated steel - smooth and new

129

137

142

145

148

148

Uncoated steel - smooth and
new

134

142

145

147

150

150

Coated asbestos cement - clean

 

147

149

150

152

 

Uncoated asbestos cement -
clean

 

142

145

147

150

 

Spun cement-lined and spun
bitumen- lined - clean

 

147

149

150

152

153

Smooth pipe (including lead,
brass, copper, polyethylene,
and PVC) - clean

140

147

149

150

152

153

PVC wavy - clean

134

142

145

147

150

150

Concrete - Scobey

 

 

 

 

 

 

Class 1 - Cs = 0.27; clean

 

69

79

84

90

95

Class 2 - Cs = 0.31; clean

 

95

102

106

110

113

Class 3 - Cs = 0.345; clean

 

109

116

121

125

127

Class 4 - Cs = 0.37; clean

 

121

125

130

132

134

Best - Cs = 0.40; clean

 

129

133

138

140

141

Tate relined pipes - clean

 

109

116

121

125

127

Prestressed concrete pipes -
clean

 

 

 

147

150

150

 

 

 

UNIDADES DEL COEFICIENTE C.

 

Por medio de un análisis dimensional se obtiene que las unidades de C deben ser: