TNT Inbox:

Q: How often must I recertify?
A: Many specifications require 3 year intervals for Level I and II personnel but this will be determined by your company's written practice.

Q: I want to calibrate to perform a shear wave inspection but get no signal from my transducer. What should I do?
A: One suggestion is to remove the acrylic wedge and check for couplant.

Q: I only need to produce one or two radiographs today. Should I really perform a full equipment warmup procedure?
A: A complete warmup procedure should always be performed to avoid damage and extend the life of your X-ray equipment.

Q: I'm confused about the documents SNT-TC-1A and CP-189. Is there a major difference between the two?
A: One major difference is that SNT-TC-1A is a guideline or recommended practice and CP-189 is an ANSI standard.

Q: When should I clean the blacklight lens?
A: Remove and clean the lens before you turn it on and while it is cold. Frequency should be determined by your Level III.

Q: I took a centrifuge sample from the magnetic particle test unit and the reading is below the specification requirement. What should I do?
A: Using the solution application hose and a brush, brush and wash the boards on the bed of the unit. Remove the boards to brush and wash the interior surfaces of the tank. Use the brush along the bottom middle of the tank to stir any settled particles. Replace all boards and take another sample. If the reading is still low,new particles must be added according to the proper procedure. Consult your Level III.

 

E-mail, fax or phone questions for the TNT Inbox to the editor.
hhumphries@asnt.org
(614) 274-6899 fax
(800) 222-2768 X206

 

[ The NDT Technician ]

 

 

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