The problem of calculating pressure confuses me
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The company is designing a low-temperature insulated pressure vessel (inner tank + outer shell + vacuum insulation layer), with an operating pressure of 1.6 Mpa. To determine the thickness of the inner tank, it is necessary to use twice the operating pressure as the calculated pressure (according to the regulations for welded insulated gas cylinders). However, some designers from manufacturers suggest that, in accordance with GB150 standards, the calculated pressure should be 1.15 times the operating pressure. May I ask: how exactly should the calculated pressure be determined? The difference between these two values results in a significant difference in the calculated thickness.
Check whether the pressure vessel you have designed falls within the scope of application of \"Welded Insulated Gas Cylinders\"; if it does, it must be constructed in accordance with the provisions of that standard.
Gas cylinders can be quite dangerous, so be careful
For the wall thickness of the inner and outer layers, strength, reinforcement through openings, and the selection of flanges for this product, a value of 150 can be used. However, certain technical requirements such as insulation, vacuum level, and safety devices must meet the specifications outlined in GB18442-2001; you should take a look at this standard
The poster must be in a hurry and confused; the first thing to determine is whether this device meets the requirements for gas cylinders. If it falls within the category of pressure vessels, then GB150 should be followed. We have designed many low-temperature insulated pressure vessels (with an inner tank, an outer shell, and a vacuum insulation layer), all of which comply with GB150. Of course, they also need to meet GB18442 standards
Reply to 4# ghostxxl: This standard is already available on the forum; please search first before uploading to avoid wasting resources
I think we should first clarify the scope of application of the standards to determine which one applies to your container; if both standards apply, then the one with the higher requirements should be followed