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

thread292-23932

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

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

(OP)
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.

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

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

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

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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