I recently performed a weld repair on a 16" Sa335 Gr.91 1.4 wall weld on an HP steam system. After Post weld Heat Treatment we performed HB hardness testing and found that the hardness was as follows:
Pipe 200 HB
Weld 225 HB
Fitting (elbow) 150 HB
We preped multiple areas on the elbow to verify...
They have (4) gas fired HRSG's at this particular plant and have had failures in in all of them. The failure is always tube number 9 from the east or west wall and in the third or fourth row approx. 1" off the lower header is where the tube severs (there are (2) row of T-23). They believe that...
I am looking for approx. 6' of 2" OD SA213 t-23 .220 to .265 wall tube material and have found in only bulk quantity's over seas. Anyone have some for sale? I have a HRSG in Nevada that has had failures with this material.