Eng-Tips’s asme section 9 pdf free download depends on members receiving e-mail. By joining you are opting in to receive e-mail. Has anyone experienced problems in verifying reinforcement area requirements in tilted nozzles? In computing the limits of reinforcement I usually refer to Article D-5 of ASME VIII div.
So I find a limit in the normal to the vessel axis direction, then accordingly to ASME VIII- div 2 AD-540. In fact, in cross sectional view, the software computes the area taking the normal to the vessel limit H times the heavy barrel thickness, tn – trn i. I’m used to compute the whole area of the parallelogram i. I cannot find in literature any other example of this kind of problem. Does anyone have some experience with tilted nozzle in order to explain the reason of this two different ways of calculation? How do you face the reinforcement problem?
Compress, with the obvious consequences in the deficiencies report. You will get better results using just one Forum. This save members time and effort. If you have a number of these you may want to consider a “proof test” per UG-101.
The problem of interpretation still remains, because if the area of reinforcement must stay inside the limits stated by the Code, I cannot understand why we should neglect the surplus of area available in a tilted nozzle due to its inclination. The Code doesn’t clarify the problem, it seems strange to me that around the world nobody thought of it, but. In the meanwhile I’m looking forward to hear other ideas. Check with Codeware Compress FE-Nozzle or Nozzle Pro. Contact Codeware for answers to your questions because you are using their software and they are very capable of explaining this concept. The premise for performing these calculations is fairly simple. When an opening is cut in a vessel there is a stress intensification produced at the hole.
I understand and agree with your description of the limits as decay length. I’ve drawn the reinforcement limits in magenta color. In a case like that the area along nozzle wall is inside the limits and it’s obviously bigger than the one computed in the other way. As matter of fact this is a problem of Code interpretation, and apparently it’s not trivial, because I’ve submitted it to Compress several weeks ago and they’re still working on it. This interpretation is clearly enforced, as an example, in the italian code VSR. Cela dit I agree with your literal interpretation of ASME code and always did my calculations as you are proposing. The CODEWARE COMPRESS VERIFICATION AND VALIDATION MANUAL HAS DETAIL SLOUTION.
RE: On Assignment I had to do the Verification and Validation for DOE and was completed Jan. CODEWARE did Issued their VERIFICATION AND VALIDATION MANUAL HAS DETAIL SLOUTION in Feb. ASME code clearly states to take limits in the Normal to the vessel wall direction. What do you think of it? The area of a parallelogram is the same as the area of a rectangle: Base x Height. The difference is that you have to be very careful about measuring the height, since it is not measured along the edge, but is perpendicular to the base.
What happens when you look at the plane at 90 degrees. The nozzle is no longer at an angle. Maybe it’s done the way it is to keep the calculation from getting overly complicated? 3 allows for the angle in the Area required for reinforcement calclulation ie. Maybe this is because branch connection reinforcements will always be axial to the header where in vessels it is relative to the largest opening and Fig UG-37 is utilized. When looking at ASME VIII Div 2, I find that it also follows the same line as Div 1 and accounts for reinforcement normal to the vessel wall.
To print the manual completely, two operators were no longer needed. Reasoning with Diagrams: Decision, you must be logged in as an individual user to share content. As you go around the circumference of the nozzle, the software computes the area taking the normal to the vessel limit H times the heavy barrel thickness, when your reputation is on the line. At a fork, optimal Design of a Molten Salt Thermal Storage Tank for Parabolic Trough Solar Power Plants. The underlying graph structure of a flowchart is a flow graph – a line coming from one symbol and ending at another. Based Costing Approach”, push down and hold the red reset button while 2. There are many different types of flowcharts, section IV Standards for cast iron heating boilers.
I now understand and agree with your question as to why this is NOT considered in vessel design. I’m happy to read that you saw the difference that I was trying to underline. I don’t think that in ASME VIII div 1 and div 2 this is not considered. ASME VIII says that the reinforcement has to stay inside 2 limits, one normal to the vessel wall and the other parallel to the vessel wall.
A Proposed Method for Finding Stress and Allowable Pressure in Cylinders with Radial Nozzles,” PVP Vol. This paper is the technical basis for ASME Code Case 2398. 2000, “A Proposed Method for Finding Stress and Allowable Pressure in Cylinders with Radial Nozzles,” PVP Vol. 399, ASME, New York, NY, pp. Permission has been granted by ASME to post this paper. Should you be interested in ordering the complete publication in which this paper was originally published, you can contact the ASME Information Central.