Joint efficiency for ellipsoidal heads
Joint efficiency for ellipsoidal heads
(OP)
Hello All,
For a shell and head (ellipsoidal) circumferential type 2 joint with no RT,why does Compress use a 85% joint efficiency? If I manually enter a user defined efficiency of 65%, the program states a required marking of RT4, assuming that I am using RT.
For a shell and head (ellipsoidal) circumferential type 2 joint with no RT,why does Compress use a 85% joint efficiency? If I manually enter a user defined efficiency of 65%, the program states a required marking of RT4, assuming that I am using RT.





RE: Joint efficiency for ellipsoidal heads
the je compress is using is based on 2 choices
the head to shell girth seam is fully radiographed or partially rradiographed per ug-11(a)5 b the je is 100%
any other rt or no rt of girth seam is 85%
this is inaccordance with uw-12 (d)
RE: Joint efficiency for ellipsoidal heads
Thanks for the reply. The heads are seamless, there is no RT performed, and the backing strip remains in place. UW-12(d) states 85% for type 3,4,5, or 6 joints and I am using a type 2. Am I just interpreting UW-12(d) wrong?
RE: Joint efficiency for ellipsoidal heads
E=.85 WHEN EITHER
uw-11a5b is not met
or
when welds are 3 4 5 or 6
what this says type 1 or 2 welds can be 100% if the uw-11a5b is met or 85% when not met
type 3 4 5 6 are 85 regardless of radiography