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Andrei
NDT Inspector,
Philippines, Joined May 2015, 5

Andrei

NDT Inspector,
Philippines,
Joined May 2015
5
03:10 May-12-2015
PAUT Minimum Thickness

Dear All,

Hello Guys..just wanna ask your opinions what is the minimum thickness for PAUT of boiler tube inspections?Thank you in advance . GOD BLESS YOU ALL

 
 Reply 
 
Shahid Nisar
Engineering,
Saudi Arabia, Joined Feb 2009, 136

Shahid Nisar

Engineering,
Saudi Arabia,
Joined Feb 2009
136
08:21 May-12-2015
Re: PAUT Minimum Thickness
In Reply to Andrei at 03:10 May-12-2015 (Opening).

Andrei
Your construction code /standard & procedure dictate your applicable thickness range. e.g. ASME CC 2235 applicable for T equal or greater than 13 mm. whereas some European codes allow for 6mm and greater.
Based on your procedure and new examination requirements (for example lower thickness specimen) you shall have to demonstrate on the same low thickness welded mock up and qualify by detecting defects as mentioned by referencing code. ASME sec V art IV Mandatory appendix IX is an example for qualification. All qualification shall be approved by a Level III.
one more point to remember is that at very low thicknesses detail defect characterisation is quite difficult. In most cases only a status of GO/No GO may be declared.
Regards

 
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