Tablas de Conversion

TABLAS DE CONVERSION
SISTEMA INTERNACIONAL DE UNIDADES ( SI)
LONGITUD
mm----pulgadas
1mm = 0.03937 pulgadas
Ejemplo: 683,7 mm = 26,9167
mm
0.0
0.1
0.2
0.3
0
1
2
3
4
5
6
7
8
9
0.0394
0.0787
0.1181
0.1575
0.1969
0.2362
0.2756
0.3151
0.3543
0.0039
0.0433
0.0827
0.1220
0.1614
0.2008
0.2402
0.2795
0.3189
0.3583
0.0079
0.0472
0.0866
0.1260
0.1654
0.2047
0.2441
0.2835
0.3228
0.3622
0.0118
0.0512
0.0906
0.1299
0.1693
0.2087
0.2480
0.2874
0.3268
0.3661
mm
0
10
20
30
0
100
200
300
400
500
600
700
800
900
3.940
7.870
11.810
15.750
1.690
23.620
27.560
31.500
35.430
0.394
4.334
8.264
12.204
16.144
20.084
24.014
27.954
31.894
35.824
0.787
4.727
8.657
12.597
16.537
20.477
24.407
28.347
32.287
36.217
1.181
5.121
9.051
12.991
16.931
20.871
24.801
28.741
32.681
36.611
0.4
0.5
pulgadas
0.0157 0.0197
0.0551 0.0591
0.0945 0.0984
0.1339 0.1378
0.1732 0.1772
0.2126 0.2165
0.2520 0.2559
0.2913 0.2953
0.3307 0.3346
0.3701 0.3740
40
50
pulgadas
1.575
1.969
5.515
5.909
9.445
9.839
13.385 13.779
17.325 17.719
21.265 21.659
25.195 25.589
29.135 29.529
33.075 33.469
37.005 37.399
0.6
0.7
0.8
0.9
0.0236
0.0630
0.1024
0.1417
0.1811
0.2205
0.2598
0.2992
0.3386
0.3780
0.0276
0.0669
0.1068
0.1457
0.1850
0.2244
0.2630
0.3031
0.3425
0.3819
0.0315
0.0709
0.1102
0.1496
0.1890
0.2283
0.2677
0.3071
0.3465
0.3858
0.0354
0.0748
0.1142
0.1535
0.1929
0.2323
0.2717
0.311
0.3504
0.3898
60
70
80
90
2.362
6.302
10.232
14.172
18.112
22.052
25.982
29.922
33.862
37.792
2.756
6.696
10.626
14.566
18.506
22.446
26.376
30.316
34.256
38.186
3.151
7.091
11.021
14.961
18.901
22.841
26.771
30.711
34.651
38.581
3.543
7.483
11.413
15.353
19.293
23.233
27.163
31.103
35.043
38.973
1
PRESION
bar > Pa > psi(libras/pulgada cuadrada)
1 bar = 100.00 Pa = 100 k Pa = 14,5 psi
1 Pa = 0,00001 bar = 0,000145 psi
1 psi = 0,069 bar = 6897,8 Pa
bar
0.0005
0.001
0.005
0.01
0.05
0.069
0.1
0.25
0.5
0.75
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
7.0
8.0
9.0
10.0
12.0
14.0
16.0
18.0
20.0
Kpa*
0.05
0.10
0.5
1
5
6.9
10
25
50
75
100
150
200
250
300
350
400
450
500
550
600
700
800
900
1000
1200
1400
1600
1800
2000
psi
0.0073
0.0145
0.0725
0.145
0.725
1.000
1.450
3.625
7.250
10.875
14.500
21.750
29.000
36.250
43.500
50.750
58.000
65.250
72.500
79.750
87.000
101.500
116.000
130.500
145.000
174.000
203.000
232.000
261.000
290.000
psi
0.007
0.015
0.070
0.150
0.700
1.000
1.500
3.000
7.000
10.000
15.000
20.000
25.000
30.000
35.000
40.000
50.000
60.000
70.000
80.000
90.000
100.000
110.000
125.000
150.000
175.000
200.000
225.000
250.000
300.000
Kpa*
0.05
0.1
0.48
1.04
4.83
6.90
10.35
20.70
48.30
69.00
103.50
138.00
172.50
207.00
241.50
276.00
345.00
414.00
483.00
552.00
621.00
690.00
759.00
862.50
1035
1207.5
1380
1552.5
1725
2070
bar
0.005
0.0010
0.0048
0.0104
0.0483
0.0690
0.1035
0.2070
0.4830
0.690
1.0350
1.380
1.725
2.070
2.415
2.760
3.450
4.140
4.830
5.520
6.210
6.900
.7590
8.625
10.350
12.075
13.800
15.525
17.250
20.700
* Para obtener valores manejables, apliquese 100.000 Pa = 100 kPa
2
PAR DE GIRO
kpm > Nm > libras pulgadas
1 kpm = 9,81 Nm = 87,11 libras pulgadas
Según SI, la magnitud kpm deberás sustituirse por Nm
Kp
0.010
0.050
0.1
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
12.0
15.0
20.0
Nm
0.0981
0.4905
0.981
4.905
9.810
14.715
19.620
24.525
29.430
34.335
39.240
44.145
49.050
53.955
58.860
63.765
68.670
73.575
78.480
83.385
88.290
93.195
98.100
117.720
147.150
196.200
libras pulgadas
0.8711
4.3550
8.7110
43.5550
87.1100
130.6650
174.2200
217.7750
261.3300
304.8850
348.4400
391.9950
435.5500
479.1050
522.6600
566.2150
609.7700
653.3250
696.8800
740.4350
783.9900
827.5450
871.1000
1045.3200
1306.6500
1742.2000
3
CAUDAL
l/min > Kv > CV
QNn
l/min
10
50
80
100
120
150
180
200
250
300
330
400
450
500
550
600
650
700
750
800
900
1000
1200
1500
1750
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
7000
7500
8000
8500
9000
9500
10000
Kv
Cv
0.009
0.045
0.072
0.091
0.109
0.136
0.163
0.182
0.227
0.273
0.300
0.364
0.409
0.455
0.500
0.545
0.591
0.636
0.682
0.727
0.818
0.909
1.091
1.364
1.590
1.818
2.272
2.727
3.182
3.636
4.091
4.545
5.000
5.454
5.909
6.364
6.818
7.272
7.727
8.182
8.636
9.091
0.010
0.051
0.081
0.102
0.122
0.152
0.183
0.203
0.254
0.305
0.335
0.407
0.457
0.508
0.558
0.609
0.660
0.711
0.762
0.813
0.914
1.016
1.219
1.524
1.778
2.032
2.540
3.048
3.556
4.065
4.573
5.081
5.589
6.097
6.605
7.113
7.621
8.130
8.638
9.146
9.654
10.162
Kv: Caudal de agua, expresado en m3/h a
temperaturas entre +5 y + 30ºC, que atraviesa un
elemento en una dirección determinada y
experimentando una caída de presión de 1 bar
(según VDI 2173).
Suponiendo que el elemento actúa como una tobera
corta (lo que es cierto en la mayoría de los casos ),
puede calcularse el valor Kv de acuerdo a la
siguiente fórmula
Kv = A0/19.84 Kv en m3/h
A0 en mm2
En esta formula, la sección transversal equivalente
es A0 = 0,018 x QNn de lo que resulta:
Kv = QNn/1100 QNn
caudal normal nominal en
l/min
El coeficiente “flor” (magnitud empleada en
Norteamérica para el caudal) se calcula con la
siguiene ecuación:
Cv = QNn/984
4
TEMPERATURA
Formula de ºC a º F = ºC = (ºF-32) x 0.556
Formula de ºF a ºC = ºF = (ºC x 1.8) + 32
ºF
ºC
-100 -73.3
-95 -70.6
-90 -67.8
-85 -65.0
-80 -62.2
-75 -59.4
-70 -56.7
-65 -53.9
-60 -51.1
-55 -48.3
-50 -45.6
-45 -42.8
-40 -40.0
-35 -37.2
-30 -34.4
-25 -31.7
-20 -28.9
-15 -26.1
-10 -23.3
-5
-20.6
0
-17.8
+5 -15.01
+10 -12.2
+15
-9.4
+20
-6.7
+25
-3.9
+30
-1.1
+32
0.0
+35 +1.07
+40 +4.4
+45 +7.2
+50 +10.0
+55 +12.8
+60 +15.6
+65 +18.3
+70 +21.1
+75 +23.9
+80 +26.7
+85 +29.4
+90 +32.2
+95 +35.0
ºF
+100
+105
+110
+115
+120
+125
+130
+135
+140
+145
+150
+155
+160
+165
+170
+175
+180
+185
+190
+195
+200
+205
+210
+215
+220
+225
+230
+235
+240
+245
+250
+255
+260
+265
+270
+275
+280
+285
+290
295
300
ºC
+37.8
+40.6
+43.3
+46.1
+48.9
+51.7
+54.4
+57.2
+60.0
+62.8
+65.6
+68.3
+71.1
+73.9
+76.7
+79.4
+82.2
+85.0
+87.8
+90.6
+93.3
+96.0
+98.9
+101.7
+104.4
+107.2
+110.0
+112.8
+115.6
+118.3
+121.1
+123.9
+126.7
+129.4
+132.2
+135.0
+137.8
+140.6
+143.3
+146.1
+148.9
ºF
+305
+310
+315
+320
+325
+330
+335
+340
+345
+350
+355
+360
+365
+370
+375
+380
+385
+390
+395
+400
+405
+410
+415
+420
+425
+430
+435
+440
+445
+450
+455
+460
+465
+470
+475
+480
+485
+490
+495
+500
ºC
+151.7
+154.4
+157.2
+160.0
+162.8
+165.6
+168.3
+171.1
+173.9
+176.7
+179.4
+182.2
+185.0
+187.8
+190.6
+193.3
+196.1
+198.9
+201.7
+204.4
+207.2
+210.0
+212.8
+215.6
+218.3
+221.1
+223.9
+226.7
+229.4
+232.2
+235.0
+237.8
+240.6
+243.3
+246.1
+248.9
+251.7
+254.4
+257.2
+260.0
ºC
-100
-95
-90
-85
-80
-75
-70
-65
-60
-55
-50
-45
-40
-35
-30
-25
-20
-17.8
-15
-10
-5
0
+5
+10
+15
+20
+25
+30
+35
+40
+45
+50
+55
+60
+65
+70
+75
+80
+85
+90
+95
ºF
-148
-139
-130
-121
-112
-103
-94
-85
-76
-67
-58
-49
-40
-31
-22
-13
-4
0
+5
+14
+23
+32
+41
+50
+59
+68
+77
+86
+95
+104
+113
+122
+131
+140
+149
+158
+167
+176
+185
+194
+203
ºC
+100
+105
+110
+115
+120
+125
+130
+135
+140
+145
+150
+155
+160
+165
+170
+175
+180
+185
+190
+195
+200
+205
+210
+215
+220
+225
+230
+235
+240
+245
+250
+255
+260
+265
+270
+275
+280
+285
+290
+295
+300
ºF
+212
+221
+230
+239
+248
+257
+266
+275
+284
+293
+302
+311
+320
+329
+338
+347
+356
+365
+374
+383
+392
+401
+410
+419
+428
+437
+446
+455
+464
+473
+482
+491
+500
+509
+518
+527
+536
+545
+554
+563
+572
ºC
+305
+310
315
+320
+325
+330
+335
+340
+345
+350
+355
+360
+365
+370
+375
+380
+385
+390
+395
+400
+405
+410
+415
+420
+425
+430
+435
+440
+445
+450
+455
+460
+465
+470
+475
+480
+485
+490
+495
+500
ºF
+581
+590
+599
+608
+617
+628
+635
+644
+653
+662
+671
+680
+689
+698
+707
+716
+725
+734
+743
+752
+761
+770
+779
+788
+797
+806
+815
+824
+833
+842
+851
+860
+869
+878
+887
+896
+905
+914
+923
+932
5
UNIDADES, TABLAS DE CONVERSION Y
FORMULAS
SISTEMA INTERNACIONAL DE UNIDADES ( SI)
PRESION
DE
MPa (Megapascal)
MPa
MPa
bar (bar)
bar
bar
kp/cm2 (kilopindio / cm2)
kp/cm2
kp/cm2
PSI (Libra/pulgada2)
PSI
PSI
atm (atmnosfera)
atm
atm
atm
A
MULTIPLICAR POR
bar
10
kp/cm2
10.197
PSI
145.0
kp/cm2
1.020
MPa
0.1
PSI
14.504
bar
0.981
MPa
0.0981
PSI
14.223
bar
0.0689
kp/cm2
0.0703
MPa
0.00689
bar
1.01325
kp/cm2
1.0332
PSI
14.696
MPa
0.10132
EJEMPLO
10 Mpa x 10 = 100 bar
10 Mpa x 10197 = 101.97 kp/cm2
10 Mpa x 145.0 = 1450 PSI
10 bar x 1.020 = 10.2 kp/cm2
10 bar x 0.1 = 1.0 MPa
10 bar x 14.504 = 145 PSI
10 kp/cm2 x 0.981 = 9.81 bar
10 kp/cm2 x 0.0981 = 0.981 MPa
10 kp/cm2 x 14.223 = 142.2 PSI
100 PSI x 0.0689 = 6.89 bar
100 PSI x 0.0703 = 7.03 kp/cm2
100PSI x 0.00689 = 0.689 MPa
1.1 atm x 1.01325 = 1.115 bar
1.1 atm x 1.0322 = 1.137 kp/cm2
1.1 atm x 14.695 = 16.166 PSI
1.1 atm x 0.10132 = 0.111 MPa
CAUDAL
DE
l/s (Litro / segundo)
l/s
l/min (Litro/minuto)
l/min
CFM (Pie3 / minuto)
CFM
m3/h (metro3 /hora)
A
MULTIPLICAR POR
l/min
60
CFM
2.119
l/s
0.0167
CFM
0.0353
l/min
28.32
l/s
0.472
l7min
16.667
EJEMPLO
10 l/s x 60 = 60 l/min
10 l/s x 2.119 = 21.2 CFM
100 l/min x 0.0167 = 1.7 l/s
100 l/min x 0.0353 = 3.5 CFM
100 CFM x 25.32 =2832 l/min
100 CFM x 0.472 = 47.2 l/s
100 m3h x 16.667 = 166.7 l/min
6
VOLUMEN
DE
m3(metro)
m3
Litro
Litro
Litro
Litro
ft3(pie)
ft3
Galon (us)
Galon
(imperial)
in3
cm3
A
Litro
ft3
m3
ft3
Galon (us)
Galon
(imperial)
m3
Litro
Litro
MULTIPLICAR
POR
1000
35.3
0.001
0.0353
0.264
0.220
0.0283
28.32
3.785
Litro
4.546
cm3
in3
16.387
0.0610
EJEMPLO
10 m3 x 1000 = 10.000 Litro
10 m3 x 35.3 = 353 ft3
100 Litro x 0.001 = 0.1 m3
100 Litro x 0.0353 = 3.53 ft3
100 Litro x 0.264 = 26.4 Galon (us)
100 Litro x 0.220 = 22.0 Galon
(imperial)
10 ft3 x 0.0283 m3 = 0.283 m3
10 ft3 x 28.32 = 283.2 Litro
100 Galon (us) x 3.785 = 37.85 Litro
10 Galon (imperial) x 4.546 = 45.46
Litro
10 in3 x 16.387 = 163.87 cm3
10 cm3 x 0.0610 = 0.610 in3
LONGITUD
DE
m (Metro)
ft (pies)
mm (milimetro)
Pulgada
A
ft
m
Pulgada
mm
MULTIPLICAR POR
3.28083
0.3048
0.0393
25.4
EJEMPLO
10 m x 3.28083 = 32.8083 feet
10 feet x 0.3048 = 3.048 m
10 mm x 0.0393 = 0.393 Pulgada
10 inch x 25.4 = 254 mm
A
MULTIPLICAR POR
0.1020
0.2248
9.806
2.205
0.454
4.448
EJEMPLO
10 N x 0.1020 = 1.02 kp
10 N x 0.2248 = 2.25 lbf
10 kp x 9.806 = 98.06 N
10 kp x 2.204 = 22.05 lbg
10 lbf x 0.454 = 4.54 kp
10 lbf x 4.448 = 44.48 N
A
MULTIPLICAR POR
EJEMPLO
2.205
10 kg x 2.205 =22.05 lb
0.454
10 lb x 0.454 = 4.54 kg
FUERZA
DE
N (Newton)
N
kp (kilopondio)
kp
lbf (Libra de fuerza)
lbf
kp
lbf
N
lbg
kp
N
MASA
DE
kg (Kilogramo)
lb (libra)
lb
kg
TORSION
DE
Nm(newton Metro)
Nm
kpm (kilopondio Metro)
kpm
lbfft (Libra de fuerza Pie)
lbfft
A
kpm
lbfft
Nm
lbfft
Nm
kpm
MULTIPLICAR POR
0.1020
0.7376
9.81
7.233
1.356
0.1383
EJEMPLO
10 Nm x 0.1020 = 1.02 kpm
10 Nm x 0.7376 = 7.38 lbfft
10 kpmX 9.81 = 98.1 Nm
10 kpm x 7.233 = 72.33 lbfft
10 lbfft x 1.356 = 13.56 Nm
10 lbfft x 0.1383 = 1.38 kpm
7