CAEPIPE
CAEFLOW
PIPESTRESS
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User Comments
{"We use CAEPIPE to design the process coils in our steam cracking furnaces. These coils operate at temperatures between 1,200°F & 2,000°F. Supports must be sized properly to prevent coil distortion and rapid failure. CAEPIPE graphic displays are extremely useful in determining if we have input the geometry correctly and in evaluation of results." }
Arthur DiNicolantonio, Exxon, CAEPIPE user for over 12 years
{"The new graphics rendering feature [in CAEPIPE v5.x] is fantastic. It far exceeds the graphics of any other piping stress analysis program I have seen."}
Ed Patnode, Advanced Thermal, CAEPIPE user for over 10 years
| • | Overview |
| • | Preprocessor features |
| • | Main processor features |
| • | Postprocessor features |
| • | CAENOZLS versus WRC 107 – A Comparison |
| • | Benefits |
CAENOZLS performs linear stress and flexibility analyses of radial nozzle or pipe penetrations in spherical vessels or cylindrical vessel heads. The analysis is performed for: (1) six external load components (three forces and three moments) acting on each end of the nozzle, (2) nozzle pressure, (3) vessel pressure, and (4) different temperature change for each component at the penetration. The spherical vessel or vessel head may be locally reinforced.
In addition, CAENOZLS performs linear stress and flexibility analyses of radial nozzle or pipe penetrations in cylindrical vessels and tanks. The analysis is performed for: (1) external load components acting on each end of the nozzle, (2) nozzle pressure, and, (3) vessel pressure.
CAENOZLS is based on closed-form solutions in shell theory and hence does not require any mesh generation. Instead, only the dimensions of each component are required. The program demonstrates outstanding accuracy when compared to WRC bulletins 107 and 297, Bijlaard's, experimental, finite element, and other shell-analysis program results.
This integrated system consists of a preprocessor, a main processor and a postprocessor, in addition to an accounting program that keeps track of software usage time.
| • | Menu-driven input, highly interactive |
| • | Extensive error checking |
| • | High resolution color graphics |
| • | Built-in help information |
| • | Hardcopy of graphics display of model |
| • | Built-in library of materials for easy data retrieval |
| • | Simultaneous use of text and color screens during model generation for instant feedback |
| • | Highlights current component or material on color screen for error-free model generation |
| • | Closed-form solutions in shell theory |
| • | High speed calculations |
| • | Provides stresses in each component in any number of output locations and angles, unlike WRC bulletins 107 and 297 |
| • | Computes local vessel stiffnesses at nozzle-to-vessel junction, which WRC bulletins 107 and 297 do not |
| • | Elapsed execution time in seconds indicated for each computational task |
| • | Displays local vessel stiffnesses for piping analyses |
| • | Enables code evaluation by displaying maximum stress intensities for each component |
| • | Hardcopy of graphics display of stresses |
| • | Permits browsing of results on screen prior to print-out |
| • | Screen-oriented, menu-driven input |
CAENOZLS versus WRC 107 – A Comparison
| CAENOZLS | WRC 107 |
| Both internal and external nozzles are allowed. | Only external nozzle is permitted. |
| Stresses in the piping attached to both inner and outer nozzles can be evaluated. | No attached piping can be included. |
| Shell reinforcement is permitted. | No shell reinforcement is permitted. |
| External loads on both the internal and external nozzles, vessel pressure, nozzle pressure and thermal expansion of the nozzle are analyzed. | Only external nozzle loads are analyzed. |
| Shallow and steep shell solutions are used. Hence, d/R ratio can be as high as 0.8 as long as the penetration edge is away from the knuckle region of the heads. | Shallow shell theory is used. The ratio d/R has limitation of about 0.4 to 0.5. |
| Stresses in the shell at the reinforcement junction, in the reinforcement at the nozzle penetration, in the external and internal nozzles, and in the attached piping are evaluated. | Only shell stresses are computed. |
| Stresses at any distance from any of the discontinuities can be reported. | Shell stresses only at the penetration are computed. |
| Stresses at angle around the penetration are calculated, as maximum stress need not be at any of these 4 angles. | Shell stresses only at 4 angles (i.e., 0, 90, 180, and 270 degrees) are reported. |
| Local shell stiffnesses are reported. | Local shell stiffnesses are not computed. |
| • | Real-time model generation |
| • | 'What if' calculations |
| • | Suitable for both designers and engineers |
| • | Design optimization |
| • | Instantaneous turn-around |
| • | Substantial reduction in learning time |
| • | Increased productivity |
| • | Dramatic labor and cost savings |
| • | Field evaluation of as-built designs |
| • | Eliminates mesh-generation |
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