[en] The Denver Research Institute undertook a project to investigate feasibility of fabricating an x-ray stress analyzer for measuring residual stress in austenitic stainless steel pipe. Stainless steel coupons were tested first, using a laboratory breadboard set up. Successful tests, as compared to electrical resistance strain gauges were followed by tests on sample specimens of 10 inch stainless steel pipes which had been seam-welded. The resulting data indicated that it would be feasible to design an instrument based on the DRI technology and apparatus. It was recommended that the proposed instrument be designed, fabricated and delivered in the next phase of the project