|
| |
STRESS ANALYSIS
Pipe stress analysis is often required to evaluate the effect of pressure, thermal, seismic and other static and dynamic loads on piping.
Dynaflow International Inc. highly recommend Stress Analysis for the following cases:
 | Pipelines larger than 2" connected to air coolers or steam generators |
| Pipes subject to dynamic/surge conditions |
| Pipes connected to strain sensitive equipment |
| Pipelines operating at high temperatures and/or pressures |
| Process air duct work subject to thermal loads associated with dryers, coolers, calciners, etc. |
| Pipelines with large thrust forces |
| Pipelines subject to external pressure |
| Pipelines on critical service |
| Pressure relief systems |
The need for pipe stress analysis is evaluated based on applicable codes and considering process/project requirements.
Typical applications include:
| Static analysis of piping and structural models |
| Analysis of wind , snow, ice, earthquake and shock load effects |
| Evaluations of nozzle and vessel stresses in accordance with WRC 297, API 650, or BS 5500 |
| Analysis of static and dynamic load combinations |
| Evaluation of vibration responses for damped systems |
| Analysis of impact loads such as water hammer, slug flow, and relief valve discharge |
| Animation of dynamic responses |
A thorough pipe stress analysis also includes the design of piping supports. The design scope usually includes the pipe attachments as well as additional support steel and any modifications to the main structure.
Piping Flexibility and Stress Analysis
This consulting service consists of building a computer model of the piping systems, connected rotating equipment and any other process equipment connected to the piping system on CAESAR II. To this model, the static effects of temperature change, pressure, weight (pipe, contents, insulation and concentrated loads), the environment (wind, snow, ice, earthquake and shock), pipe supports and restraints are applied. The support/restraint system may include spring hangers, rigid supports, anchors, soil resistance, line stops, guides, non-linear restraints and hold down clamps. The results of all such effects are then reviewed, evaluated and compared with allowable loads set forth in industry standards as well as accepted piping codes. Analyses can be processed to check compliance with the following Piping Codes - ANSI/ASME B31.1, B31.3, B31.4, B31.8, ASME Section 3, Class 2 & 3, U.S. Navy, Norwegian, Swedish, Polish and Russian. In addition, rotating equipment allowable loads can be verified when compared with NEMA SM23, API Std. 617 and API Std. 610. In the event that the effects of seismic loadings or fluid surge/hammer is required to be considered, it can be accurately modeled, analyzed and evaluated. An accurate analysis of each piping system, including the support/restraint system, any connected equipment and the conditions/effects to be considered, is critical to the proper evaluation and operation of a piping system.
|
|
|
|
|