Loads acting on the container port
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I would like to ask the experts: when using CAESAR2 to calculate the loads acting on the vessel nozzles, how can we verify that the calculations meet the required standards? Is there a load table similar to that for pump nozzles available for reference? I’m just starting to use CAESAR; thank you all so much
It’s fine roughly; anyway, gaskets are often replaced in China
There are some discussion forums regarding equipment loads. The original poster can take a look! The standards governing the load capacity of different devices also vary. For example, the steam pipe connections of turbines should comply with the specifications in NEMA SM23, while the pipe connections of centrifugal compressors should follow the specifications in API 617. (For reference only! ) Each unit should have some approximate experience value, right? Some project equipment manufacturers will provide the nozzle load.
For rotating equipment, there are usually corresponding specifications. Such as API610, API617, NEMA SM32, etc. If it’s a container, there are two methods. The first one is flange leakage; if this is satisfied, there will definitely be no problem. Some organizations consider this to be too conservative, so they opt not to use it. The second is the stress on the openings of the equipment. This can be submitted to the equipment specialists for verification, or verification can also be carried out using WRC107 provided by the software. (In fact, the equipment is also calibrated using WRC107; it’s just the software that differs.)
It is best to use finite element software for calculations, such as Ansys
If the equipment specialist cannot provide the allowable load, then use WRC107 for verification
The pump is verified in accordance with API610; after simulating the inlet and outlet pipes of the pump, the forces acting on the pump outlet are taken into account in the calculations using API610. This information should be available in the CAESAR training materials
In fact, larger engineering companies have established specified allowable loads for the nozzles of conventional pressure vessels. Different foreign investment projects have different requirements. However, for rotating equipment, there are corresponding standards available for reference, such as API610, API617, API 560, NEMA 23, and so on. The verification of the loads on the vessel’s nozzles is primarily carried out in accordance with WRC 107. However, the SW6 software used in equipment design in our country includes a subroutine for checking the local stresses at the nozzles, and it relies mainly on WRC 297. Four conditions must be met when applying WRC 297; for details, please refer to the instructions for using SW6. Difference between WRC107 and WRC297: WRC107 is a cylindrical model, while WRC297 is a tubular model; in fact, WRC297 is a supplement to WRC107. If anyone is interested, they may refer to ASME IIIV, DIV.2