Yep, ASME Code 9-G6 certified for years. It was oilfield and everything from 25# lines to waterflood at 5000#psi OP and gas production equipment hydro tested at 10,000# psi. Lots of repairs on pumpjacks, waterflood leaks, etc. plus some structual stuff. I even built some office furniture including bookends. I spent 2 years in underground maintenance in a potash mine putting equipment back together to start with but the need for fresh air and sunshine plus crappy work conditions (people in charge) sent me out of that place.