Steam pipeline stress calculation
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Gentlemen, a beginner here has a question: I’m having trouble performing stress calculations for a steam pipeline using CAESAR2. What could be the issue? The process is as follows: “Given: a steam pipe with DN150 diameter. Temperature: 200, pressure: 1200 KP, insulation thickness: 110. The pipe material is stainless steel. From the steam pipeline network, into the liquid oxygen and liquid nitrogen vaporizers. The setting of corrosion parameters under relevant conditions was found on Baidu. The fluid density was determined to be 6.1 KG/M3 by referring to a table that provides values for a temperature of 200 and a pressure of 1200 kp. Stainless steel was actually used for the pipes, but it is not listed in the software’s material database. Therefore, based on the allowable stress of 138 MPa for stainless steel pipes as found in relevant sources, A358304 was chosen, as it is a material that is fairly close to this value in the software. 3 In reality, there are supports only on both sides of the valve. When modeling CAESAR, +Y sliding supports are used for all cases, also distributed on both sides of the valve. 4 The fixing brackets used at the vaporizer nozzles are simulated. The interfaces of the steam pipeline network are not simulated.
Firstly, the red color indicates that a stress test was not passed, which means the bracket placement is incorrect; it is necessary to adjust the bracket
This post was last edited by Lü Xíng Tiān Xià on 2020-4-18 08:54; the fluid density is incorrect, and that’s the key issue. The density of the insulation material has not been entered.
Is there already a Chinese version of CII? Where can I download it from the forum?
Is the code stress this high? I suggest you first check the input and unit settings, especially things like wall thickness, pressure, insulation, and density.
Check the input value; it seems the unit of the input parameter was entered incorrectly
1. Your fluid density input is incorrect, and the error is quite significant. (The problem is serious; the root cause) 2. The insulation density of your pipeline has not been entered. (No major problem.) 3. The diameter of your DN150 pipe should be 168.3 or 168; you need to verify the wall thickness of your pipe. 4. The model does not show the length of your pipes, so it’s difficult to determine whether the setup of your supports is appropriate or not.