Dear KCR,
Leak Path is defined as the shortest way in any direction on a macro/micro specimen between the inside of the tube and the gap between tube and tube-plate, see example below. The maximum value will be the thickness of the tubes wall thickness, but because of improper welding this can become less when weld thickness is not sufficient. As far as I know the minimum acceptable value should be specified by your customer and is not mentioned anywhere in ASME section I.
Through Weld A (green) the path is longer than the thickness of the tube wall t and therefore Leak Path will be t.
The thickness of Weld B (red) is smaller as the tube wall t, here the shortest dimension measured through the weld will be the Leak Path.
Hope this makes things clear for you.
Met vriendelijke groeten / Best Regards
Herman Pieper
Pieper Quality Support & Inspection
Phone: +31 (0)521 380083
Fax: +31 (0)84 7539225
Cell: +31 (0)6 51691215
www.pieper-qsi.nl
Van: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] Namens kcrtechnical
Verzonden: vrijdag 19 augustus 2011 4:57
Aan: materials-welding@googlegroups.com
Onderwerp: [MW:12266] Tube to Tube sheet welds_Minimum Leak Path Measurement _REg.,
Dear all,
Can you share with me about minium leak path measurement and its acceptance crietaria as per ASME Section I.
Best regards
K C R
--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
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.
Comments