The 3,5mm (10/2 - 3/2) of land either side of the root bevel on the lower face (in the diagram) may be difficult to achieve good fusion. As is often the case, if it presents a challenge to the welder, then it will present a challenge to the UT tech as well. Of course if the very best welders and...
With the uneven weld prep and the lower part with 10mm of land, I think the 1st question is can it be reliably welded with complete penetration and fusion?
Typical demonstration of quality for tube-tubesheet welds is to perform test pieces in the same manner and then section them. Problem with NDT on production welds is access (and cost). Have you a problem with leaks?
Hi Scott
" ...able to get through BINDT titled Magnetic particle inspection of precipitation hardening type steels written by C R Preston. It was originally published December of 2002 in Vol. 44 No. 12 of Insight."
Where are you based? Have you tried to obtain a copy from BINDT, Northampton...
Slip-on flange should not require RT or UT because of the geometry being unfavourable to both. Surface crack detection (MPI for carbon steel, penetrant for stainless) shouls suffice.
Please take the sage advice of metengr and have the parts tested professionally by a nationally-approved test house which has the right personnel, equipment and approvals.
Both Rockwell and Vickeers will leave macro surface indentations. Equotip (or some similar comparable equipment) should...
Your first post refers to welded parts. What size and shape are they? What equipment do you have and is it portable or fixed?
The advantages of the 2 systems I mentioned are they are both portable and both widely recognized hardness test equipment.
I concur with metengr, you need qualified...
http://www.ndt.net/article/0498/ginz_wel/fig1028b.gif
On this diagram (of a compound weld) there is a clear difference between what I term missed edge (LFS cap) and undercut (U/c Cap). I am an NDE guy but not a welding engineer but I believe the former has a different cause than the latter, and...
In this specific case and my general parlance, where the capping run adjacent to the parent material has left a small (circa 10mm long) unfilled zone with the weld bevel. Instead of an even geometry pass, at this one point the bead narrows and doesn't even reach the bevel. Hope this explains -...
In such case is a repair called and then proceed as per the repair procedure (and added to the repair rate) or is the repair welder authorized to grind open the missed edge, MPI and then manually fill out, followed by a pull of the line so that weld is in the AUT bay and the touch-up/weld repair...
QC7
"Fe" denotes the wires used are of low carbon steel, "SS" that the wires are of stainless steel (CrNi). These materials have different radiation absorption characteristics. You write that they "...are in the same group" What do you mean, from where do you take your information? Make a...
demsha
Your post heading "LOF after galvanisation" is erroneous if NDT (UT and MPI) was suitable prior to galvanisation.
If items were proven to be defect-free prior to galvanisation then I suggest that metengr and gtaw are likely correct and these are not LOF defects.
Of course there is...
http://www.twi.co.uk/technical-knowledge/faqs/structural-integrity-faqs/faq-what-is-the-relationship-between-charpy-impact-energy-and-charpy-lateral-expansion-for-ferritic-steels/
this gives an empirical relationship and a graph between impact value and lateral expansion
