Re: [MW:17819] Radiographic Film Interpretation Excess Penetration..

There is some lack of information in your inquiry email.

 

Question1: RT defect indication was of how much length in the film ? Was it a girth weld ? 

 

Question2: The inspector who rejected the film, gave you the answer or justification that why he is rejecting or giving repair, can you explain his way of answer ?

 

Question3: As you have mentioned in your email that inspector has measured the defect with the use of ruler.

How he has mesured the dimension of the defect (that is widthwise or lenghwise across the film or by any calculation) ?

What was his conclusion / final measurement length / depth of weld reinforcement after measuring ?

 

Question4: What was the welding process ?

 

Question5: Was there any access in the inside of the pipe to measure actual weld reinforcement ?

 

Queston6: What was the pipe thickness ?

 

Please refer my reply point wise.

 

Point No.1: Rejection should always be based on some measurable basis / or by some written reference while referring the code.

Point No.2: Can anyone explain the technique, how the depth of weld reinforcement be measured from RT film ?

 

Point No.3: API 1104 is silent about RT acceptance criteria for weld reinforcement.

 

Point No.4: Refer Appendix A of API 1104 (A 5.1) for the limitations / inaccauaracy of RT for evaluating such defect. (Proper Justification is required from inspector for rejection)

 

Point No.5: If the inspector is unable to explain the calculation he made, I think he has no right to reject the film.

 

Point No.6: API 1104 is allowing some major welding defects like Incomplete penetration, Incom. Fusion etc., then the weld refinforcement would not be a cause of rejection only by assuming & if not measurable.

 

Point No.7: Clause no. 13.8.4 Rejection Based On Reinforcement, is for Automatic welding without filler metal addtions (e.g. flash butt welding process)  - Was pipe welding process is the same ?

 

Best Regards

 

Hiren Sevak

On Mon, May 27, 2013 at 11:58 AM, Dominic v.k.dominic <v.k.dominic@gmail.com> wrote:

Dear Expertise,

I have this issue please anyone clarify me,

One QA/QC- Inspector 20 years Experience person  he rejected one 24" pipe line  RT film   because of excessive penetration by measuring the dimension with a ruler and required the joint to be repaired..

This is Acceptable or Not Acceptable.

if Acceptable where is mentioned the code?

Please clarify me, Because my management take this issue very serious  

Best Regards 

Dominic V.K.

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