Pipe Stress Analysis Software - CAEPIPE & Piping Stress Tutorial. For information on Piping Stress Analysis, click on the link below. Basic Pipe Stress Analysis Tutorial. Tutorial: Table of Contents. Pipe Stress Analysis: Basic Concepts.

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Piping Stress Analysis Software- Pipe stress design Program.

Introduction. It is common practice worldwide that piping designers/layout personnel route pipes with consideration given mainly to space constraints, process and flow constraints (such as pressure drop) and other requirements arising from constructability, operability and reparability. Unfortunately, often pipe stress requirements are not sufficiently considered while routing and supporting piping systems, especially in providing adequate flexibility to absorb expansion/contraction of pipes due to thermal loads.

Example descriptions of piping and pipeline design calculator spreadsheets to determine ASME B31 pipe and tube required thicknesses, allowable pressures, branch.

The piping designers, in turn, make routing changes and send the revised layout to the pipe stress engineers to check compliance again. Such . So, it is all the more important to make the piping layout flexible at the time of routing by piping designers. The . Dead- weight is from weight of pipes, fittings, components such as valves, operating fluid, test fluid, insulation, cladding, lining etc. Internal design/operating pressure develops uniform circumferential stresses in the pipe wall, based on which pipe wall thickness is determined during the process/P& ID stage of plant design such that .

In addition, internal pressure develops axial stresses in the pipe wall. These axial pressure stresses vary only with pressure, pipe diameter and wall thickness, all three of which are pre- set at the P& ID stage and hence these axial pressure stresses cannot be reduced by changing the piping layout or the support scheme. On the other hand, dead- weight causes the pipe to bend (generally downward) between supports and nozzles, producing axial stresses in the pipe wall (also called .

If the piping system is not supported in the vertical direction (i. Typical vertical supports to carry dead- weight are: Resting steel supports,Rod hangers,Variable spring hangers, and.

Constant support hangers. If pipe lifts up at any of the rod hangers / resting supports during operating condition, then that support does not carry any pipe weight and hence will not serve its purpose. Two examples are presented in this Tutorial to illustrate how piping can be supported by spring hangers and resting steel supports to comply with the code requirements for sustained loads. Thermal Load (also referred as Expansion Load): It refers to the . If the piping system is not restrained in the thermal growth/contraction directions (for example, in the axial direction of a straight pipe), then for such cyclic thermal load, the pipe expands/contracts freely; in this case, no internal forces, moments and resulting stresses and strains are generated in the piping. On the other hand, if the pipe is . When such calculated thermal stress ranges exceed the .

So, in order to avoid . This is normally accomplished as follows: Introduce bends/elbows in the layout, as bends/ elbows . On the other hand, if the two equipment are located with an . By following one or more of the steps from (a) to (d) above and steps (e) and (f) listed below, such nozzle loads can be reduced.

Introduce . To protect piping from wind (which normally blows in horizontal plane), it is normal practice to attach . During an earthquake, the earth may also move vertically.

To protect piping against both horizontal and vertical movement during earthquake, some of the resting supports may be made as . To withstand static seismic . Generally, some of the vertical weight supports can be modified as .

On the other hand, for thermal loads, zero supports give zero stresses. So, thermal stresses and equipment nozzle loads will normally decrease as the number of supports goes down.

Axial restraints and intermediate anchors are recommended only to direct thermal growth away from equipment nozzles. Once all the data is in, Analyze. Drivers Wifi Notebook Acer Aspire One D270 Camera Ready. Now, review Results.

Step. 2: Studying Thermal Stress results for the Initial Layout. Review first stress contour plot for thermal stresses. The plot is color- coded such that . Intermediate areas between these distinct colors will be of . So, the goal is to arrive at a .

For a more . By studying such deformed shape, it is possible to arrive at a layout with appropriate bends, offsets and loops and/or with appropriately located axial restraints/intermediate anchors such that thermal stress ratios do not exceed . This process may require several iterations on layout and/or locations for axial restraints/intermediate anchors. Step 4: Studying Results for Sustained Load. After finalizing piping layout under Steps 2 and 3 for thermal loading, the next task is to support the system vertically to carry its own deadweight under operating condition.

In this connection, first review stress contour plot shown in color codes from . Based on this input, vertically support the piping such that sustained stresses do not exceed . This step may require a number of analysis iterations with several different locations for weight supports. In case resting steel supports are selected to provide vertical support for piping under sustained load, it is to be made sure that piping continues to rest on such steel supports even during operating condition (= weight + pressure + thermal) and does not lift off from these supports. If pipe lifts up at any of these resting supports during operating condition, then that support does not carry any pipe weight and hence will not serve its purpose.

Similarly, at rod hanger locations, the tendency of piping should be to deform downward for operating load case, so that the rod hangers carry the pipe weight under tension. On the other hand, if pipe lifts up at any of the rod hangers, then that rod hanger goes into compression thereby not carrying the weight of the piping during operating condition. Whether the pipe weight is being carried during operation by resting steel supports and/or rod hangers (both types are mathematically modeled as one- way vertical Limit Stops in CAEPIPE) or whether the pipe lifts up at those support locations is shown in the report titled . The goal is to make sure the status is shown as . Next, identify those weight support locations (for example, resting supports) in the .

This step may require a number of analysis iterations with several different locations for . If the calculated loads at nozzles/anchors exceed the corresponding Allowable Loads, by studying the deformed shapes provided by CAEPIPE for different load cases, it is possible to further modify the layout and/or support scheme such that the calculated loads at nozzles/anchors do not exceed the Allowable Loads. As a minimum, the above said Nozzle Load compliance should be carried out for Operating Load case. Any such changes made to the layout and/or support scheme at this stage (i.

Step 8) should not adversely affect the stresses for thermal, sustained and occasional load cases (i. A) connects two equipment at nodes 1. The pipe, made of A5. Grade A carbon steel, is heated to 3. This layout will have to be rerouted. Let us try the rerouting as shown in Fig.

D. 1. D shows a revised layout with a loop, introducing two additional bends at nodes 1. So, thermal growth of X- directional pipes between nodes 1. Z- directional pipe between nodes 3.

The corresponding stress contour plots for thermal and sustained load cases are shown in Fig. E and Fig. 1. F, confirming code compliance. A is made of three pipe sizes. Between nodes 1. 0 and the first reducer.

Between the first reducer and the second reducer and ending at node 9. Between nodes 9. 0 and anchor node 1. T = 4. 70. 2. B, straining the pipe between nodes 1. In other words, the thermal growth of pipe between nodes 4.

The corresponding thermal displacement and thermal stress contour plots are given in Fig. Kuch Is Tarah Serial Watch Online. E respectively. 2. F confirms that the present configuration with only two equipment nozzles at nodes 1. A shows the same problem as in Example 2 but with a 6.