We are a fabrication shop that works to D1.1 (large part of our product/process is Submerged Arc Welding). All of our PQRs, Welders and Operators have been qualified to D1.1. Our PQR's have been qualified with VT, MT, UT, RT, Tensiles, Side Bends, and Charpy impacts (at -40 and -50c).
A...
When trying to qualify a PQR using UT inspection the plate/weldment failed, but when using RT the plate passed. Per D1.1 can the PQR still be used as a passing procedure with RT inspection passing but UT failing, all other visual, and mechanical testing passed.
Can a PQR that has been qualified but was not done with pre-heat be used (exact same plate material, joint, welding process, etc...) when customer documents require pre heat on production product. In other words: can a PQR that didn't have preheat be used for production when pre-heat is required?
Does any one know of a good resource for finding full time Level II and Level III NDT, UT. Our company would like to hire UT inspectors but cannot find any potential teamm members.
I am trying to qualify Welding Procedures to AWS D1.1. My base metal has a CVN impact toughness of 430j @-50c, testing labs are not willing to test fill size CVN samples at this strength, they will only test subsized samples.
AWS D1.1, clause 4, paragraph 4.36.5 stats that no subsized CVN...
We have customer requirements that state we need to achieve CVN values of 27j @ -50 on weldments. Upon testing our weldments a testing lab used subsized samples (5mm x 5mm x 20mm), is there a mathmatic way to correlate the subsized CVN results back to a standard size sammple (10mm x 10mm x 20mm).
I recently received several plates of ASTM A709, Gr.50, Normalized Rolled steel. The material certs were provided with the steel and Charpy V Notch values were provided from the steel mill on the material certs. The CVN test were performed at -40c, at the mill. The results listed on the...
