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Why don't seamless components have 100% joint efficiency?

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Christine74

Christine74

Mechanical
Oct 8, 2002
557
In Section VIII, Div. 1, why is there a requirement for spot radiography in order to use E = 1.0 in calculations for SEAMLESS shell sections and heads? Does that make sense?

Thanks.
 
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Christine74,

In such a case, E has nothing to do with longitudinal seams because there is no longitudinal seam. Seamless head or shell also have circular seams to get together. E is for this circular seams. Conclusively the rule, in my opinion, makes sense.

kyong
 
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kyong is right. See the calculation requirements of UG-27 (1) and (2). I assume the spot that you refer to is a UW11(a)(5)(b) and not UW-11(b).
 
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