Consult an Eddy current Testing guy, may be it will help.
--- On Sat, 30/6/12, ags 36681 <ags1280@gmail.com> wrote:
From: ags 36681 <ags1280@gmail.com>
Subject: [MW:14724] carburization of furnace tubes
To: "materials-welding" <materials-welding@googlegroups.com>
Date: Saturday, 30 June, 2012, 6:54 PM
Dear friends, we recently changed the ethane furnace tubes after service in 4 years, now we are planning to segregate the healthy tubes & return bends from used/removed lot to re-use in future if needed. Material of the tube/bend is 25Cr/35Ni/Nb+Micro. We can check visually for cracks, thinning, bowing etc. UT is not feasible, because there is some sort of rough coating over it. How about the field metallography for carburization? thanks a lot to all dear friends. -- To post to this group, send email to materials-welding@googlegroups.comTo unsubscribe from this group, send email to materials-welding+ unsubscribe@googlegroups.comFor 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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