Outlines

 

Leak testing fundamentals

• Reasons for leak testing
• Functions of leak testing
• Terminology
• Leak testing units
• Leak conductance

 

Leak testing standards

• Leak standards
• NationalInstituteofStandardsand Technology (NIST) traceability and calibration
• Instrument calibration versus test qualification
• System calibration techniques
• Inaccuracy of calibration
• Tracer-gas leak rate/air-equivalent leak rate

 

Leak testing safety

• Safety considerations
• Safety precautions
• Pressure precautions
• Tracer gas safety and monitoring
• Safety devices
• Cleaning and electrical hazards
• Safe work practices
• Safety regulations

 

Leak testing procedure

• Basic categories and techniques
• Leak location versus leakage measurement
• Pressurization or evacuation
• Sealed units with or without tracer gas
• Units inaccessible from one or both sides
• System at, above, or below atmospheric pressure

Leak testing specifications:

• Design versus working conditions
• Pressure and temperature control
• Types of leak testing methods
• Sensitivity of leak testing needed
• Test method and sensitivity needed  
• Preparation of a leak testing specification

 

Detector/instrument performance factors:

• Design and use
• Accuracy and precision
• Linearity (straight/logarithmic scale)
• Calibration and frequency
• Response and recovery time

 

Physical Principles in Leak Testing:

1.1 Physical quantities

• Fundamental units
• Volume and pressure
• Time and temperature
• Absolute values
• Standard versus atmospheric conditions
• Leakage rates

1.2 Structure of matter

• Atomic theory
• Ionization and ion pairs
• States of matter
• Molecular structure
• Diatomic and monatomic molecules
• Molecular weight

1.3 Gas principles and laws

• Brownian movement
• Mean free path
• Pressure and temperature effects on gases
• Pascal’s law of pressure
• Charles’ and Boyle’s gas laws
• Ideal gas law
• Dalton’s law of partial pressure
• Vapor pressure and effects in vacuum

1.4 Gas properties

• Kinetic theory of gases
• Graham law of diffusion
• Stratification
• Avogadro’s principle
• Gas law relationship
• General ideal gas law
• Gas mixture and concentration
• Gas velocity, density and viscosity

 

Principles of Gas Flow

1.5 Standard leaks

• Capillary
• Permeation

1.6 Modes of gas flow

• Molecular and viscous
• Transitional
• Laminar, turbulent, sonic

1.7 Factors affecting gas flow

1.8 Geometry of leakage path

• Mean free flow of fluid
• Clogging and check valve effects
• Irregular aperture size
• Leak rate versus cross section of flow
• Temperature and atmospheric conditions
• Velocity gradient versus viscosity
• Reynolds number versus Knudsen number

Who Should Attend

 

• The course is designed for anyone who is interested in satisfying the classroom training requirements for Leak Testing Level II certifications or who needs a thorough knowledge and practical experience of Leak Testing Methods.

Duration

5 Days