Leak Testing: Useful leak specification guidelines
Explore the Leak Testing Section
Leak Testing is used to ensure quality, tested and proven parts are supplied into the market. The use of leak testing equipment eliminates failures in the field.
Explore this section to find out more about the how TQC can help you with your leak testing requirements
- Overview
- Air Decay
- Helium
- Other Test Methods
- Leak Testing Services
- Standard Equipment
- Case Studies
- Automotive Brake Leak and Flow Testing
- Automotive Bedplate Leak Test Machine
- Battery Tray Leak Test Machine
- Chilled Beam Leak Test
- Flexible Leak Test Facility
- Fuel Tank Leak Testing
- Helium Leak Test Bench
- Helium Leak Testing of Automotive Fuel Pipes
- High Pressure Audit Leak Testing System with Datalogging
- High Speed Leak Testing of Pipe Fittings using Air and Helium
- High Speed Leak Testing of Plastic Vial for the Medical Industry
- Leak Test Facility for Water Valves
- Leak Test Cell with Robotic Handling
- Casting Leak Testing of Engine Blocks
- Medical Filter Leak Test Machine
- Medical Showerhead Leak Test Machine
- Plastic Fuel Rail Leak and Burst Test Machine
- Plastic Sump Pipe Leak Test and Assembly
- Small Medical Device Leak Test Machine
- Twin Station Leak Test Machine for Oils Sumps
- V6 Cylinder Head Leak Test Machine
- V6 Engine Leak Test Machine
- V8 Cylinder Head Leak Test Machine
- V8 Engine Block Leak Test Machine
- Valve Block Leak Test Machine
- Vauxhall Leak Test Machine
- Weapon Leak Test Machine
| 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 |
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 |
| 1x10-4 | 0.1 | 0.006 | 2.8 hours | 41.9 secs |
| 1x10-5 | 0.01 | 6x10-4 | 27.8 hours | 7.0 min |
| 1x10-6 | 0.001 | 6x10-5 | 11.6 days | 69.8 min |
| 1x10-7 | 1x10-4 | 6x10-6 | 16.5 weeks | 11.6 hours |
| 1x10-8 | 1x10-5 | 6x10-7 | 3.2 years | 4.8 days |
| 1x10-9 | 1x10-6 | 6x10-8 | 31.8 years | 6.9 weeks |
| 1x10-10 | 1x10-7 | 6x10-9 | 318 years | 1.33 years |
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 | atm mm3/sec |
atmcc/min | atmLitre/min | atm m3/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 |
To find out more about how we can help you with your leak testing requirements:
We build all machines in-house, applying our 25+ years experience in specialised test and automated handling machines experience to the engineering projects we undertake. We offer customer support, backup and service call-out for all projects, whatever the size.
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.
- Contact us online
- Email us or call us on 0115 950 3561
