The acceptance criteria for NB-2540 inspections is a loss of back reflection. No calibration blocks are needed for a loss of back reflection inspection. If you have non-parallel surfaces, then the provision to use a DAC curve that provides equivalent sensitivity comes into play. The specifics...
From the QA side, some specifications require a positive statement if no weld repairs were performed (similar to no mercury containing compounds were used during manufacturing). The mill probably chose to stick the statement on all the paper to avoid missing it on one that required it.
JR97
kevlar49,
Solvent removable is Method C. (You are only going to do solvent removable with Type II inspections (visible)). Method A is water washable. There is no solvent remover used with water washable penetrants.
Jr97
Pressequip,
As long as there isn't a significant difference in the rough machined and final machined thicknesses, the conservative approach is to cut the notches into one of each run of forgings at the rough machined thickness with the notch depth based on 3% of the final machined thickness. A...
A.M.
It sound like diffraction. Very common in Inconel welds that we radiograph. Any way you take take photo of a film in front of a viewer and post?
JR97
samvanwesen
if you are doing soap bubble testing, you want the low pressure differential across the boundary. Specs I have worked with would limit the differential to about 300mBar. If the pressure differential is too great, the soap solution will "blow out" or vaporize at a leak instead of...
Rick,
here is another one. Solidedge. The 2D version is free to download.
https://solidedge.siemens.com/en/free-software/overview/
I personally don't like it, but it meets your "free" criteria
JR97
metboss,
Also, sorry for delayed response. Perhaps what your vendor meant by a "smaller block" would be to test to a depth of, say 16" from the OD instead of the full 30". As long as their deepest test distance is greater than the center of the bar, that would be an acceptable method of...
metboss,
I am a bit surprised they are having issues with 4130 steel. May I ask, is the diameter of the bar 30 inches or is that the axial length with a smaller diameter? If it is a smaller diameter, they may be able to test from the diameter but not the length. The straight beam inspection...
metboss,
I believe what the sub-contractor is saying is the casting is too thick to test. You don't state the type of material, but if it is a stainless steel or a high nickel material I would agree with the sub-contractor.
Using a "smaller block" is not the solution. The thickness of the...
miller863,
the other posts are correct. psig is the absolute pressure offset by the atmospheric pressure which is 14.7 psi at sea level and decreases with increasing altitude. I imagine somewhere in the instrument menu structure there will be an input for atmospheric pressure (it is currently...
Appendix 8 paragraph 8.3(b) defines a rounded indication as an indication having a length to width ratio less than 3:1. Keep in mind Appendix 8 is PT criteria. The 1/16 and 3/16 dimensions mentioned are the size of the bleedout, not the size of the visible pinhole. If the pinhole has...
Put a pressure or flow sensor on the output of the check valve. however, most check valves will re-seat when the over pressure condition passes. You may get intermittent flow / pressure as the check valve lifts and re-seats.
I am not backing or discounting any theory. But, if a car /truck hit the column with enough force to completely detach it from the floor, wouldn't it have followed the column? In other words, why isn't there what is left of the vehicle resting against the thrown column? I keep getting drawn...
A note about the mystery cylindrical object in the tictoc video; I agree it looks like a garage ventilation fan. But the recent YouTube video with the lady walking through the garage in 2020 does not show any similar ventilation fans. The picture SFCharlie reposted is not from this garage. The...
erkuts,
When you perform the shell test the tubes are in compression. They are in tension for the tube test. Was the shell test performed before the tube test? If so, it is possible the tube survived in compression but failed the second test when put in tension. The other scenario I can...
LouisLac,
That is correct. The periodicity of yoke calibration was changed from annual to daily, for a reason known only to the committee, in the 2015 Edition of Section V.
