This document provides equivalent diameter factors to be applied in unit pricing for welding and installation of piping systems with wall thicknesses other than standard. It contains tables listing the nominal pipe diameter, pipe schedule/class, wall thickness, and equivalent diameter factor for various pipe sizes. The factors are used to determine the equivalent diameter for non-standard wall thickness pipes when charging for installation.

1. C0208-PAM-EP-2011- ARB SMARTPRO
Página No. 208
FACTORES DE DIAMETROS EQUIVALENTES PARA SER APLICADOS EN LAS TARIFAS
UNITARIAS DE SOLDADURA E INSTALACIÓN DE TUBERÍA DE SISTEMAS
ELECTROMECÁNICOS E ISLAS DE PRODUCCIÓN QUE TENGAN ESPESOR DE PARED
DIFERENTES A LAS ESTÁNDAR.
DIÁMETRO NOMINAL
DE TUBERÍA
(PULGADAS)
CÉDULA N° Clase
Espesor de
pared
[mm]
FACTOR
DIÁMETRO
EQUIVALENT
E
1/8
40 STD 1.73 1 0.13
80 XS 2.41 1.4 0.17
1/4
40 STD 2.24 1 0.25
80 XS 3.02 1.3 0.34
1/2
40 STD 2.31 1 0.38
80 XS 3.2 1.4 0.52
3/8
40 STD 2.77 1 0.5
80 XS 3.73 1.3 0.67
160 - 4.78 1.7 0.86
- XXS 7.47 2.7 1.35
3/4
40 STD 2.87 1 0.75
80 XS 3.91 1.4 1.02
160 - 5.56 1.9 1.45
- XXS 7.82 2.7 2.04
1
40 STD 3.38 1 1
80 XS 4.55 1.3 1.35
160 - 6.35 1.9 1.88
- XXS 9.09 2.7 2.69
1 1/4
40 STD 3.56 1 1.25
80 XS 4.85 1.4 1.7
160 - 6.35 1.8 2.23
- XXS 9.7 2.7 3.41
1 1/2
40 STD 3.68 1 1.5
80 XS 5.08 1.4 2.07
160 - 7.14 1.9 2.91
- XXS 10.16 2.8 4.14
2
40 STD 3.91 1 2
80 XS 5.54 1.4 2.83
160 - 8.74 2.2 4.47
- XXS 11.07 2.8 5.66
2 1/2
40 STD 5.16 1 2.5
80 XS 7.01 1.4 3.4
160 - 9.52 1.8 4.61
- XXS 14.02 2.7 6.79
3
- - 3.18 1 3
- - 3.96 1 3
- - 4.78 1 3
40 STD 5.49 1 3
- - 6.35 1.2 3.47
- - 7.14 1.3 3.9

2. C0208-PAM-EP-2011- ARB SMARTPRO
Página No. 209
DIÁMETRO NOMINAL
DE TUBERÍA
(PULGADAS)
CÉDULA N° Clase
Espesor de
pared
[mm]
FACTOR
DIÁMETRO
EQUIVALENT
E
80 XS 7.62 1.4 4.16
160 - 11.13 2 6.08
- XXS 15.24 2.8 8.33
3 1/2
- - 3.18 1 3.5
- - 3.96 1 3.5
- - 4.78 1 3.5
40 STD 5.74 1 3.5
- - 6.35 1 3.5
- - 7.14 1 3.5
80 XS 8.08 1.4 4.93
4
- - 3.18 1 4
- - 3.96 1 4
- - 4.78 1 4
- - 5.56 1 4
40 STD 6.02 1 4
- - 6.35 1 4
- - 7.14 1 4
- - 7.92 1 4
80 XS 8.56 1.4 5.69
120 - 11.13 1.8 7.4
160 - 13.49 2.2 8.96
- XXS 17.12 2.8 11.38
5
- - 3.96 1 5
- - 4.78 1 5
- - 5.56 1 5
40 STD 6.55 1 5
- - 7.14 1 5
- - 7.92 1 5
- - 8.74 1 5
80 XS 9.52 1.5 7.27
120 - 12.7 1.9 9.69
160 - 15.88 2.4 12.12
- XXS 19.05 2.9 14.54
6
- - 4.78 1 6
- - 5.56 1 6
- - 6.35 1 6
40 SDT 7.11 1 6
- - 7.92 1 6
- - 8.74 1 6
- - 9.52 1 6
80 XS 10.97 1.5 9.26
120 - 14.27 2 12.01
160 - 18.26 2.6 15.41
- XXS 21.95 3.1 18.52

3. C0208-PAM-EP-2011- ARB SMARTPRO
Página No. 210
DIÁMETRO NOMINAL
DE TUBERÍA
(PULGADAS)
CÉDULA N° Clase
Espesor de
pared
[mm]
FACTOR
DIÁMETRO
EQUIVALENT
E
8
- - 4.78 1 8
- - 5.16 1 8
- - 5.56 1 8
20 - 6.35 1 8
30 - 7.04 1 8
- - 7.92 1 8
40 STD 8.18 1 8
- - 8.74 1 8
- - 9.52 1 8
60 - 10.31 1 8
- - 11.13 1 8
80 XS 12.7 1.6 12.42
100 - 15.09 1.8 14.76
120 - 18.26 2.2 17.86
140 - 20.62 2.5 20.17
- XXS 22.22 2.7 21.73
160 - 23.01 2.8 22.5
10
- - 4.78 1 10
- - 5.16 1 10
- - 5.56 1 10
20 - 6.35 1 10
- - 7.09 1 10
30 - 7.8 1 10
- - 8.74 1 10
40 STD 9.27 1 10
- - 11.13 1 10
60 XS 12.7 1 10
80 - 15.09 1.6 16.28
100 - 18.26 2 19.7
120 - 21.44 2.3 23.13
140 XXS 25.4 2.7 27.4
160 - 28.57 3.1 30.82
12
- - 5.16 1 12
- - 5.56 1 12
20 - 6.35 1 12
- - 7.14 1 12
- - 7.92 1 12
30 - 8.38 1 12
- - 8.74 1 12
- STD 9.52 1 12
40 - 10.31 1.1 13
- - 11.13 1.2 14.03
- XS 12.7 1.3 16.01
60 - 14.27 1.5 17.99

4. C0208-PAM-EP-2011- ARB SMARTPRO
Página No. 211
DIÁMETRO NOMINAL
DE TUBERÍA
(PULGADAS)
CÉDULA N° Clase
Espesor de
pared
[mm]
FACTOR
DIÁMETRO
EQUIVALENT
E
80 - 17.48 1.8 22.03
100 - 21.44 2.3 27.03
120 XXS 25.4 2.7 32.02
140 - 28.57 3 36.01
160 - 33.32 3.5 42
14
- - 5.33 1 14
- - 5.56 1 14
10 - 6.35 1 14
- - 7.14 1 14
20 - 7.92 1 14
- - 8.74 1 14
30 STD 9.52 1 14
40 - 11.13 1.2 16.37
- - 11.91 1.3 17.51
- XS 12.7 1.3 18.68
60 - 15.09 1.6 22.19
80 - 19.05 2 28.01
100 - 23.83 2.5 35.04
120 - 27.79 2.9 40.87
140 - 31.75 3.3 46.69
160 - 35.71 3.8 52.51
- - 50.8 5.3 74.71
- - 53.97 5.7 79.37
- - 55.88 5.9 82.18
- - 63.5 6.7 93.38
16
- - 5.56 1.0 16.00
10 - 6.35 1.0 16.00
- - 7.14 1.0 16.00
20 - 7.92 1.0 16.00
- - 8.74 1.0 16.00
30 STD 9.52 1.0 16.00
- - 11.13 1.2 18.71
- - 11.91 1.3 20.02
40 XS 12.70 1.3 21.34
60 - 16.66 1.8 28.00
80 - 21.44 2.3 36.03
100 - 26.19 2.8 44.02
120 - 30.96 3.3 52.03
140 - 36.53 3.8 61.39
160 - 40.49 4.3 68.05
18
10 - 6.35 1.0 18.00
- - 7.14 1.0 18.00
20 - 7.92 1.0 18.00

5. C0208-PAM-EP-2011- ARB SMARTPRO
Página No. 212
DIÁMETRO NOMINAL
DE TUBERÍA
(PULGADAS)
CÉDULA N° Clase
Espesor de
pared
[mm]
FACTOR
DIÁMETRO
EQUIVALENT
E
- - 8.74 1.0 18.00
- STD 9.52 1.0 18.00
- - 10.31 1.1 19.49
30 - 11.13 1.2 21.04
- - 11.91 1.3 22.52
- XS 12.70 1.3 24.01
40 - 14.27 1.5 26.98
60 - 19.05 2.0 36.02
80 - 23.83 2.5 45.06
100 - 29.36 3.1 55.51
120 - 34.92 3.7 66.03
140 - 39.67 4.2 75.01
160 - 45.24 4.8 85.54
20
10 - 6.35 1.0 20.00
- - 7.14 1.0 20.00
- - 7.92 1.0 20.00
- - 8.74 1.0 20.00
20 STD 9.52 1.0 20.00
- - 10.31 1.1 21.66
- - 11.13 1.2 23.38
- - 11.91 1.3 25.02
30 XS 12.70 1.3 26.68
40 - 15.09 1.6 31.70
60 - 20.62 2.2 43.32
80 - 26.19 2.8 55.02
100 - 32.54 3.4 68.36
120 - 38.10 4.0 80.04
140 - 44.45 4.7 93.38
160 - 50.01 5.3 105.06
24
10 - 6.35 1.0 24.00
- - 7.14 1.0 24.00
- - 7.92 1.0 24.00
- - 8.74 1.0 24.00
20 STD 9.52 1.0 24.00
- - 10.31 1.1 25.99
- - 11.13 1.2 28.06
- - 11.91 1.3 30.03
- XS 12.70 1.3 32.02
30 - 14.27 1.5 35.97
40 - 17.48 1.8 44.07
- - 23.83 2.5 60.08
60 - 24.61 2.6 62.04
80 - 30.96 3.3 78.05

6. C0208-PAM-EP-2011- ARB SMARTPRO
Página No. 213
DIÁMETRO NOMINAL
DE TUBERÍA
(PULGADAS)
CÉDULA N° Clase
Espesor de
pared
[mm]
FACTOR
DIÁMETRO
EQUIVALENT
E
100 - 38.89 4.1 98.04
120 - 46.02 4.8 116.02
140 - 52.37 5.5 132.03
160 - 59.54 6.3 150.10
26
- - 6.35 1.0 26.00
- - 7.14 1.0 26.00
10 - 7.92 1.0 26.00
- - 8.74 1.0 26.00
- STD 9.52 1.0 26.00
- - 10.31 1.1 28.16
- - 11.13 1.2 30.40
- - 11.91 1.3 32.53
20 XS 12.70 1.3 34.68
- - 14.27 1.5 38.97
28
- - 6.35 0.73 28.00
- - 7.14 0.82 28.00
10 - 7.92 0.91 28.00
- STD 8.74 1.00 28.00
- - 9.53 1.09 30.53
- - 10.31 1.18 33.03
- - 11.13 1.27 35.66
20 XS 11.91 1.36 38.16
- - 12.70 1.45 40.69
- - 14.27 1.63 45.72
- - 15.88 1.82 50.87
- - 17.48 2.00 56.00
- - 19.05 2.18 61.03
- - 20.62 2.36 66.06
- - 22.23 2.54 71.22
- - 23.83 2.73 76.34
- - 25.40 2.91 81.37
30
- - 6.35 1.00 30.00
- - 7.14 1.00 30.00
10 - 7.92 1.00 30.00
- - 8.74 1.00 30.00
- - 9.53 1.00 30.00
- STD 10.31 1.00 30.00
- - 11.13 1.08 32.39
- - 11.91 1.16 34.66
- - 12.70 1.23 36.95
20 XS 14.27 1.38 41.52
- - 15.88 1.54 46.21
30 - 17.48 1.70 50.86
- - 19.05 1.85 55.43

7. C0208-PAM-EP-2011- ARB SMARTPRO
Página No. 214
DIÁMETRO NOMINAL
DE TUBERÍA
(PULGADAS)
CÉDULA N° Clase
Espesor de
pared
[mm]
FACTOR
DIÁMETRO
EQUIVALENT
E
- - 20.62 2.00 60.00
- - 22.23 2.16 64.68
- - 23.83 2.31 69.34
- - 25.40 2.46 73.91
- - 26.97 2.62 78.48
- - 28.58 2.77 83.16
- - 30.18 2.93 87.82
- - 31.75 3.08 92.39
- - 36.00 3.49 104.75
36
- - 6.35 1.0 36.00
- - 7.14 1.0 36.00
10 - 7.92 1.0 36.00
- - 8.74 1.0 36.00
- STD 9.53 1.00 36.00
- - 10.31 1.08 38.95
- - 11.13 1.17 42.04
- - 11.91 1.25 44.99
20 XS 12.70 1.33 47.97
- - 14.27 1.50 53.91
30 - 15.88 1.67 59.99
- - 17.48 1.83 66.03
40 - 19.05 2.00 71.96
- - 20.62 2.16 77.89
- - 22.23 2.33 83.97
- - 23.83 2.50 90.02
- - 25.40 2.67 95.95
PARA SOLDADURA DE ACCESORIOS LOS SIGUIENTES FACTORES DE CONVERSIÓN
DEBERÁN SER CONSIDERADOS:
SOCKOLETS f = 1,75
THREADOLETS f = 1,75
LATHROLETS f = 1,75
ELBOWLETS f = 1,75
WELDOLETS f = 2,5
DERIVACIÓN A 90° (INJERTO)
TUBERÍA 6" a 9" : f = 1,5 DESDE EL
DIÁMETRO MENOR
DERIVACIÓN A 45° (INJERTO)
TUBERÍA 6" a 10" : f = 1,5 DESDE EL
DIÁMETRO MENOR
REFUERZO PEQUEÑO A GRANDE: f = 1,5 DESDE
MAYOR DIÁMETRO
REFERENCIA:
1.- CUADRO X2.2 ASTM A 53