Brim, thanks for your response.
We have performed radiography with the disappointing result that the welds fail the standard, but to an unknown degree. If the X-ray image could tell thickness with any certainty, we would be doing fine!
I found a method of UT called "crack tip diffraction"...
The RCSC Guide to using ASTM 325 fasteners (http://www.boltcouncil.org/files/2004RCSCSpecification.pdf) suggests another method of controlling bolt stress--- using the "turn of the nut" method.
In theory, you get the nut tight without preloading the bolt. Then you turn the nut a...
I have a small population of completed welds whose strength is suspect. We're not prepared to rework everything, and we have too many to perform destructive strength testing. I need a non-destructive way of estimating the strength of the joint.
In words, the joint is supposed to be a complete...
racookpe, paddingtongreen, and weldtek,
So what I can take from this is the following:
1) A hydrotest is not likely to give us meaningful information.
2) Galvanized metal must be prepared correctly if you want a reliable weld.
3) Using prequalified welds improves quality by ensuring that we...
So, you don't see a real benefit from leak checking via hydrotest; is this because a superficial weld would form a seal but still have poor strength?
For the backing, we're using a galvanized sheet metal tube, bent into a rectangle that loosely fits within the "ID" of the square tube. Because...
We're having trouble with weld quality on our long, continuous 4"x4"x0.11" (11ga) galvanized structural members. We're using a field, full-penetration, convex, backed, groove weld with a gap width the same as the material thickness (3mm). The joint must be as strong as the tube to resist...
