Below are some useful tables that assist when looking at the leak specification of a part. For more information on leak testing visit our other pages here
Product/Component
Test Pressure
Leak
Test Method
WATER LEAKS/COOLING SYSTEMS
1 to 2 bar
4 to 7 cc/min
Air pressure decay
OIL LEAKAGE (various)
0.1 to 7 bar
6 to 15cc/min
Air pressure decay/flow
FUEL/DIESEL
1 to 10 bar
0.1 to 15cc/min
Air pressure decay
FUEL/PETROL
1 to 5 bar
3.0 to 15cc/min
AirPressure decay
REFRIGERATION/AIR CONDITIONING
2 to 20 bar
5 to 15 gm/yr
Tracer gas
ELECTRICAL HOUSING/CONNECTORS
0.1 to 1 bar
0.01 to 1cc/min
Pressure decay/Tracer
Leak Specification – Bubbles to leak conversion
cc/sec (ml/sec)
mm3/sec
cc/min (ml/min)
1 cc (1 ml)
2mm bubble
0.1
100
6
10 sec
24 bubbles per sec
0.01
10
0.6
100 sec
2 bubbles per sec
0.001
1
0.06
16.7 min
4.2 secs
1×10-4
0.1
0.006
2.8 hours
41.9 secs
1×10-5
0.01
6×10-4
27.8 hours
7.0 min
1×10-6
0.001
6×10-5
11.6 days
69.8 min
1×10-7
1×10-4
6×10-6
16.5 weeks
11.6 hours
1×10-8
1×10-5
6×10-7
3.2 years
4.8 days
1×10-9
1×10-6
6×10-8
31.8 years
6.9 weeks
1×10-10
1×10-7
6×10-9
318 years
1.33 years
Leak Specification – Pressure conversion chart
To convert from to (multiply by)
bar
psi
kPa
kg/cm2
mbar
Pa
inH20
mmHg
bar
1
14.5
100
1.02
1000
100000
401
750
psi
0.069
1
6.9
0.07
68.97
6896.55
27.66
51.72
kPa
0.01
0.145
1
0.01
10
1000
4
7.5
kg/cm2
0.981
14.23
98.14
1
981.35
98135
393.52
736
mbar
0.001
0.015
0.1
0.001
1
100
0.4
0.75
Pa
1E-05
1.4E-04
0.001
1.02E-05
0.01
1
0.004
0.0075
in H2O
0.0025
0.036
0.249
0.0025
2.49
249.38
1
1.87
mm Hg
0.0013
0.019
0.133
0.0014
1.33
133.33
0.535
1
Leakage flow rates conversion chart
To convert from ….to (multiply by)
atmcc/sec
m bar.l/sec
atmmm3/sec
atmcc/min
atmLitre/min
atmm3/min
atmcu ft/yr
torr.l/sec
atm cc/sec
1
1.013
1000
60
0.06
6E-05
1116
0.759
mbar.l/sec
0.987
1
987
59.23
0.059
5.9E-05
1101
0.75
atm mm3/sec
0.001
0.001
1
0.06
6E-05
6E-08
1.116
0.0007
atm cc/min
0.0167
0.017
16.67
1
0.001
1E-06
18.6
0.012
litre/min
16.67
16.88
16667
1000
1
0.001
18601
12.67
atm m3/min
16667
16883
16666667
1000000
1000
1
18601190
12664
cu ft/yr
0.0009
0.0009
0.896
0.054
5.37E-05
5.37E-08
1
0.0007
torr.l/sec
1.316
1.33
1316
78.96
0.0789
7.89E-05
1468
1
If you require any further information on how to define the leak specification for your product or how to test it please get in touch via our contact page.
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Get in touch with us to discuss your requirements and we will be happy to offer our professional advice and visit you at your site.
