Brazing may be used if the vessel is not to be later stressrelieved.
[ug - 30a]如容器以后不作消除应力处理,则也可采用钎焊。
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Was this stuff stressrelieved? Was it, when they fabricated this particular nozzle, this particular piece, was it highly stressed when they assembled it?
Sometimes stress can be relieved by simply talking to someone close and trusting and you will find that you feel better just getting things off your mind as well.