I wanted to start a general discussion about what we are predominantly seeing at this time, primarily in the defrac sector but pipelines as a whole as well, pertaining to current specification tendencies for filler metals, testing regimes, etc.
Specifically, what are we generally seeing for:
Cellulosic fillers for X60, 65, 70, and 80 if anybody has spent much time on this. Roots and F and C.
Testing regimes such as impacts, corrosion, etc.. What temps are we seeing mostly? What acceptance criteria? API 1104?
Has anybody seen alloys other than the API 5L types?
How much TMCP stuff is happening out there?
What are we seeing as far as transitions from normalizing to TMCP pertaining to yield strength?

Not seeing much X80 pipe in North America.  I think, because it has to be imported from Japan, Europe, China, Turkey, or India if it's over 24" in diameter. Last time I looked there weren't any Mills in the USA making large OD X80 grade pipe.  Pipe from the first two countries/regions are typically TMCP grades, while the latter two are more highly alloyed.  Pipe from China, would be a mixed bag, depending on the Mill I guess.  But I've never seen pipe from China here in North America.

Makes selecting filler metals a pain if there's any possibility of mixing the two types of high strength pipe on the same job.  Personally, I don't think you'll see any X80 pipe welded with XX10 electrodes due to fear of hydrogen cracking.  Most of the big stuff will be welded with solid wire and automatics; except for tie ins and repairs.  That work will be done with low hydrogen stick and FCAW.

lots and lots of grade B through X70 in the lower 48 states.  Virtually all of it welded with XX10 rod.  I don't see this changing any time soon.  Welding X70 with XX10 rod makes me a little nervous.  It's right on the edge of where hydrogen cracking can become a significant problem, moreso if preheat and interpass temps aren't well controlled.