The trunnion detail that you are referring to is usually a thin plate welded to
the back of the elbow over a relatively small section of the outside radius.
Thinking about it, when the elbow is strained in plane or out of plane the SIF wouldnt be changed drammatically. In-plane the elbow will be changed from circular to elliptical and out of plane the elbow will rotate because the trunnion plate is relatively thin and will deflect. Any comments? --- mechengr1977 <mechengr1977@yahoo.com> wrote:
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the use of trunnion welded to the elbow is a common practice in
refinery, power plant and petrochem. Charts has been develop by
engineering/contruction firms such as Flour Daniel and Bechtel to
aid in its sizing/selection. This SIF business is getting out of
hands.
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