I am cross checking a PV Elite saddle design output from a vendor using Compress and the PV Elite output is accepting a much larger load without overstressing the saddle. Compress is checking the saddle horn (S4) and the saddle wear plate (S4) but it appears that PV Elite is only checking the...
First of all Mac10 I did not say Westcoast should run a Zick calculation. I was asking if it would be a good approximation to extrapolate the stress values at PWHT temperature and use the value to evaluate the stress at two saddles using Zick.
I think CB4 has hit on the real problem, which is...
I have seen vessels get flat spots on temporary saddle supports due to improper contact in normal PWHT oven so it is not just a problem for local PWHT or internal firing. We have started putting internal supports for large nozzles or we rotate the vessel with the nozzles at 90 degree to allow...
Moss is full of inconsistent units and I have had many long days of trying to back into his procedures. I think Moss is a good reference but do not use it blindly. Isthill has given an excellent list of reference documents. I like Megyesy, Bednar and Roark.
Why did you do an extended PWHT of 5 days? This vessel should not take more than 24-36 hours including ramp up time, holding and ramp down time. I am working in the middle east and I am guessing you had cooper heat to do the internal firing for the PWHT. First of all you have to distribute...
In ASME Section II Part A Appendix A there is a list of ASTM editions that are acceptable to ASME. For SA-516-70 material editions of ASTM from 86 to 90 are acc
Welding carbon steel to stainless steel will cause cracks.
Strip the stainless material back at least 1/2 inch from the edge of the weld bevel and weld the carbon steel. 309SS Stainless steel should be applied first pass and then the apply the final passes of 316SS.
