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Bubble Leak Testing - Vacuum Box Technique  - Level I & II


Course Duration:     1 Days (8 Hours)                                                                                                   Course Fees:     $750 
Bubble Leak Testing - Vacuum Box Technique - Level I & II, Classroom NDT training course is developed to meet the requirements of ASNT SNT-TC-1A, CP -189 and other equivalent standards and customer specific written practice for training and certification in this method of Non-Destructive Testing personnel. After completion of Bubble Leak Testing - Vacuum Box Technique - course, you will get in-depth knowledge of Vacuum Box Technique principles, equipment, and application of  Vacuum Box Technique to test various product forms.

Training Examination & Certification Requirement:
During this Bubble Leak Testing - Vacuum Box Technique training classes, you will give examination in General theory, Specification, and Practical. You are required to successfully pass these three examinations with minimum of 70% grading in each examination and average grading of all three examinations should be 80% minimum as per the requirement of ASNT SNT-TC-1A 2016.
OJT Hours: As per requirements of ASNT SNT-TC-1A, you need to have a minimum of 38 Hours on-job training (OJT) after completion of training classes for certification in this method.

Basic Principle of Bubble Leak Testing - Vacuum Box Technique 

In Bubble Leak Testing (BLT), a gas pressure differential is established across a pressure boundary to be tested. A test liquid is then applied in contact with the lower pressure side of the pressure boundary. Gas leakage through the pressure boundary can then be detected by observation of bubble formed in the detection liquid at the exit points of leakage through pressure boundary. This technique provides immediate indications of the large leaks , 10^-3 to 10^-5 Pa.m^3.s^-1 or (10^-2 to 10^-4 ^3.S-1) 

Course Description: 

  • Bubble Leak Testing Theory
  • Application of Vacuum Box Technique  
  • Test Preparation of Vacuum Box Technique 
  • Examination, Interpretation, and Evaluation of Leaks Receiver  
  • Report and Specification

Hands-on Training (Practical) Outlines:

  • Test Setup and Calibration
  • Surface Preparation 
  • Application of Pressure 
  • Application of Bubble Solution 
  • Application vacuum Box and Examination of Test Part
  • Flaw Interpretation and Evaluation

Training Material
Training Course material is supplied at the start of training and divided into different sections followed by practice worksheets and quizzes. Training books also include some referencing code & specifications for examination procedure and for acceptance.
Referencing Code and Standards:

  • ASME Sec V Article 10 – Leak Testing