Pqr Assistance 625 overlay and 309/316
Pqr Assistance 625 overlay and 309/316
(OP)
I am pretty rusty when it comes to writing a PQR and new to sub sea and i need some help
we are trying to qualify a few procedures on overlay and some questions have arose in refrence to the following questions.
When doing hardness surveys are the surveys averaged in a specific manner or does each survey have to be a make or break for the PQR example
12 surveys were performed and the average was 248 on 625 to 4130 on an overlay.But we had a couple of readings in that survey that showed 290 PWHT was performed at 1190 for 16hrs Nace MRO 0175 reads like a riddle to me.
The other question i have is when performing a 309/316 overlay with the same PWHT cycle the surveys on the stainless will read lower(197) than the 4130 but the client says the requirements are 200-250 unless i can average the results how can this be achieved
If you average all of the results the test we have performed so far we ar ok to proceed but if you dont I have to figure out something else any help would be greatly appreciated
we are trying to qualify a few procedures on overlay and some questions have arose in refrence to the following questions.
When doing hardness surveys are the surveys averaged in a specific manner or does each survey have to be a make or break for the PQR example
12 surveys were performed and the average was 248 on 625 to 4130 on an overlay.But we had a couple of readings in that survey that showed 290 PWHT was performed at 1190 for 16hrs Nace MRO 0175 reads like a riddle to me.
The other question i have is when performing a 309/316 overlay with the same PWHT cycle the surveys on the stainless will read lower(197) than the 4130 but the client says the requirements are 200-250 unless i can average the results how can this be achieved
If you average all of the results the test we have performed so far we ar ok to proceed but if you dont I have to figure out something else any help would be greatly appreciated





RE: Pqr Assistance 625 overlay and 309/316
Work with a Welding Engineer, you can't learn this stuff on the internet.
RE: Pqr Assistance 625 overlay and 309/316
RE: Pqr Assistance 625 overlay and 309/316
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: Pqr Assistance 625 overlay and 309/316
197-235 for 4130 in base as well as HAZ so i am looking into the base material due to the readings being all over the place not much consistency at all
The welding was very consistent also had our client witness them we were very careful on the heat input