Ambient pressure can play a role in bulk sampling in certain situations, especially when sampling is done in a closed system or when the material is stored under certain pressure conditions.
Here are some aspects where ambient pressure plays a role:
- Bulk materials under pressure: Some bulk materials are stored or transported under increased pressure. A change in pressure during sampling could cause the physical properties of the material to change. For example, outgassing could occur when the pressure decreases, which could change the composition of the sample.
- Sampling from closed systems: When a sample is taken from a closed system (e.g. a pressure vessel), the pressure in the system must be taken into account to ensure that the sample can be taken safely and that the sampling device can withstand the pressure.
- Influence on flow properties: Pressure can affect the flow properties of bulk materials, especially fine powders. Changes in pressure can cause the material to clump together or clump together, which could make sampling difficult.
To avoid these problems, it is important to control the pressure during sampling and to ensure that the sampling equipment used is designed for the prevailing pressure conditions. In some cases, it may also be necessary to stabilize the pressure in the sample after sampling to ensure that the sample is representative of subsequent analysis.