QCJT,
The final photo does not appear to have a radius at the weld to main juncture as is indicated in the sketch posted by Littleinch. So there is still a stress raiser at this junction. Hopefully there is no significant cyclic loading. Once seen a 6"nb weldolet on a 12"nb line completely...
Govendes,
Equation given in Kellogg 3810 is basic engineering equation for I and can be found in any textbook and derived using fundamental principles.
Biginch,
Think you need to take a look at the API 520 Code and particularly the equation in Section 4.4.1.1 of the API 520 Part II 2011 Edition. Low and behold in that equation there are two terms contributing to the Reaction Force - a momentum term and a pressure term with the pressure...
MpisPipeStress,
The force in the 6inch pipe will not be the set pressure times the cross sectional area of the pipe. Look at API 520. The required P for the PxA portion of the thrust is the stagnation pressure at the point of concern - not the static pressure and certainly not the...
XL83NL,
I think you are mistaken. If you look at para 5.3.1 it basically says where you do not have creep properties for the weld metal that you should reduce the base metal creep strength by 20%.
My concern is that by just reducing the creep strength by just 20% is un- conservative for...
Anyone out there can help me with this. In ASME B31.1 Appendix II there is a method for Relief Valve Discharge Piping Design. One of the equations is to determine the pressure at the vent exit P3. In certain cases P3 calculated by this equation can be less than atmospheric (14.7 Psia). From...
