Designing pressure vessels that split.

In summary, when designing a carbon-fibre pressure vessel over an aluminum sleeve, the goal is typically to ensure that it neither splits nor explodes. This is achieved through following applicable codes and standards and considering other factors such as perceptions. However, if the intention is to protect against overpressure, options such as using a burst disk or relief valve can be implemented. Another suggestion is to create a groove in the vessel's wall that allows for controlled splitting when design pressure is exceeded.
  • #1
shavendome
7
0
If designing a carbon-fibre pressure vessel (over a aluminum sleeve), how can ensure your vessel splits if ruptured as opposed to exploding?
 
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  • #2
The normal approach is to design it so that it does neither. That is what applicable codes and standards are all about.
 
  • #3
Sometimes though, other factors need also to be considered...Perceptions for one.
 
  • #4
I don't understand what perceptions you refer to.

I've been on the investigation team after a pressure vessel split. These were cylinders, some with water, some oil, and one pneumatic. In all cases, the witnesses said they exploded. Of course, the pneumatic vessel ruptured with much more intensity.

If your intent is to protect against over pressure, then include a burst disk or a relief valve.
 
  • #5
If designing a carbon-fibre pressure vessel (over a aluminum sleeve), how can ensure your vessel splits if ruptured as opposed to exploding?

Presumably this is in addition to having other safety featues such as a pressure relief valve or two.

Perhaps you could mould a groove in the wall so that when the design pressure is exceeded it splits in a predictable way. Bit like the perforations in toilet paper are intended to make it tear in the right place.
 
  • #6
OK, that makes sense. Thank you for both replies, I really appreciate your help.
 

1. What are the main considerations when designing pressure vessels that split?

When designing pressure vessels that split, there are several key factors that must be taken into account. These include the type of material used, the maximum pressure that the vessel will be subjected to, the desired operating temperature range, and the expected lifespan of the vessel.

2. How is the material for a split pressure vessel chosen?

The material for a split pressure vessel is typically chosen based on its ability to withstand high pressures, corrosion resistance, and cost-effectiveness. Common materials used include carbon steel, stainless steel, and various alloys.

3. What design considerations are necessary to ensure the safety of a split pressure vessel?

To ensure the safety of a split pressure vessel, the design must account for factors such as stress distribution, potential failure modes, and the use of appropriate safety features such as pressure relief valves and rupture disks. The vessel must also be designed to withstand any potential external forces or impacts.

4. How is the maximum pressure determined for a split pressure vessel?

The maximum pressure for a split pressure vessel is determined by considering the intended use and operating conditions of the vessel. This includes factors such as the type of fluid or gas being contained, the desired flow rate, and any potential changes in temperature or pressure that may occur during operation.

5. What is the expected lifespan of a split pressure vessel?

The expected lifespan of a split pressure vessel can vary depending on several factors, such as the material used, the level of maintenance and inspections, and the operating conditions. In general, a well-designed and properly maintained pressure vessel can last for many years, with some lasting decades or even longer.

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