Film density veriation permitted by code is Minus 15% - Pluss 30% (i.e. may be gama or xray) but suppose client specifies special requirement (in writting) related to density you must follow clients requirement.
Regards,
RK Vichare
----- Original Message -----
From: Jean Staton
To: materials-welding@googlegroups.com
Sent: Mon, 24 Oct 2011 17:47:55 +0530 (IST)
Subject: RE: [MW:12760] RT density
The only where I see that 1.3 is allowed is for composite viewing.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]
On Behalf Of pankaj kolhe
Sent: Saturday, October 22, 2011 11:42 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:12753] RT density
But somewhere i have read that on overlapped area minimum density required is 1.3 is it true?
pankaj
On Sat, Oct 22, 2011 at 12:18 AM, Jean Staton <Jean.Staton@metco-ndt.com> wrote:
Referring to ASME V, Art. 2 T-282.1 & 282.2 I understand it to read that the "area of interest" (and IQI) can not exceed 2.0 to 4.0.
What is your area of interest, is it between the location markers, is it the weld, heat affected zone, base metal, how much "area of interest" do you have? I have one level III that has said "area of interest" is between position/location markers, while other
Level III's have said it's the area that you are interested in. Spelling it out in the Procedure would be ideal.
From:
materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com]
On Behalf Of meisam shokri arfaei
Sent: Friday, October 21, 2011 1:15 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:12737] RT density
Dear Pankaj,
Any NDT related work shall have a written procedure. These procedures may be in accordance with one or more codes or standards which support the user for some special works. In
those procedures special situation for the work shall be defined. the first place that you have to search for such information about overlap of films is in written procedures.
But in general, there is a qualified range of film density that the interpreter can evaluate radiographic film in this range. The overlap shall be in such a way that each part of
the film that is out of this range (usually lesser in density) repeats in next shoot within the in-range film density.
Regards
On Thu, Oct 20, 2011 at 10:38 PM, Nandesh Kumar <nandeshkumar@rocketmail.com> wrote:
Dear Pankaj,
Film overlap is given only for identification purpose that the same weld is continued.
Dont measure the density on the overlapped lighter area. Measure the density on un overlapped area of the previous film.
Its a general knowledge and no code says anything about that, as far as I know.
Nandeesh
Dear sir, |
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