We get per diem and some travel pay but it still costs a lot to travel up to 2200 miles one way for work and stay in a decent place and eat. My family has been traveling a lot with me this year also so it adds to the expense out of town but knocks down the bills at home. I'm just a pipe welder working in nuclear and other power plants. We do a lot of alloy and high pressure steam piping mostly. Probably made around 8-900 x ray welds this year and some places 2 gets you run off.