Are you looking for long term solution or temporary solution to complete the project ?
I have used both the methods and found acceptable. If your requirement is temporary and you have facility of in-house testing you can choose Carbon arc gouging.
For carbon are gouging you have to grind 3mm after carbon arc gouging To be assured how much carbon deposition / dilution from the carbon rod occurred, you can do mock up at different depth (after removal of surface layers) and carry out PMI to check carbon % and other main elements and establish the data. The same can be witnessed by client. In my experience there is not much carbon pick up observed and you can get the chemistry at 0.5 to 1.0 mm depth (no need to remove 3mm from the gouged surface).
In plasma hand held torch you need very skill full operators and getting that torch may affect the Project Cost.
You have not mentioned what type of joints and shape & size of the product.
Regards.
--
C. K. Purohit
Eng-Tech Weld1
Sr Welding Inspector
-- I have used both the methods and found acceptable. If your requirement is temporary and you have facility of in-house testing you can choose Carbon arc gouging.
For carbon are gouging you have to grind 3mm after carbon arc gouging To be assured how much carbon deposition / dilution from the carbon rod occurred, you can do mock up at different depth (after removal of surface layers) and carry out PMI to check carbon % and other main elements and establish the data. The same can be witnessed by client. In my experience there is not much carbon pick up observed and you can get the chemistry at 0.5 to 1.0 mm depth (no need to remove 3mm from the gouged surface).
In plasma hand held torch you need very skill full operators and getting that torch may affect the Project Cost.
You have not mentioned what type of joints and shape & size of the product.
Regards.
On 31 March 2010 09:46, PB HEGDE <hegde.pb@isgec.com> wrote:
--Dear Friends
What is the best method of back gouging of SS weld of heavy thickness plate?
Do you prefer
i) Back Gouging by Carbon Arc rod
ii) By Plsama gouging with hand torch
Ia)If By Carbon Arc rod – How much gouged surface you prefer to grind ? to remove carbon contamination
Iia) Is there any special plasma torch available for back gouging
Regards
Hegde P.b.
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--
C. K. Purohit
Eng-Tech Weld1
Sr Welding Inspector
To post to this group, send email to materials-welding@googlegroups.com
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For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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