This paper examines two key themes regarding the use of hydraulic tensioners to assemble pressure boundary bolted joints. The first theme is the amount of overload required to compensate for load loss that occurs due to both nut-to-tensioner mechanical interaction and, in the case of less than 100% tensioning, bolt-to-bolt mechanical interaction during assembly using hydraulic tensioners. The second theme is to examine the effect on the required assembly procedure if the target bolt stress value is close to yield. This paper has practical application for general assembly of large diameter bolts, but in particular for assembly of low strength bolting, such as A193-B8M class 1 and class 2 bolts.

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