Container classification issue, seeking help
Thread Content
As shown in the diagram, the PV value is already greater than 50; according to the relevant standards, the first group of fluids should be classified as Category III. However, the explanation given in this diagram is that the majority of these fluids consist of methanol-containing produced water, with only a small amount of natural gas present. Therefore, it is classified as Category II according to the second group of media. So, how should containers with such two-phase media of different categories be classified? Is it necessary to provide the volume of each of the two media separately? Moreover, it is not possible to determine the volume ratio between the gas phase and the liquid phase from this image. The hazard level of the medium is explicitly labeled as \"explosive\"; could there be an issue with this image? Will the special inspection agency raise any concerns during the subsequent equipment manufacturing and inspection processes?
There must be a problem; either change the medium properties or change the container type.
Now that it’s determined that the design needs to be changed, how should we approach classifying containers with these two types of materials?
This post was last edited by gn_1984 on 2017-7-17 09:49. Classified according to the explosiveness of the medium, it belongs to the first group of media; this device is categorized as Class III/A2. If classified as Category II, then the medium should be non-explosive and belong to Group 2 of media.
The regulations state that for containers holding mixed media, they should be designed and manufactured in accordance with the requirements of the highest relevant category
Multi-media or multi-component, according to the highest level of classification
Classifying according to the most hazardous medium is likely an incorrect classification.
Answers to what you’re looking for can be found on pages P102 of Annexes A.1.3.3 and A1.3.4 of TSG21-2016; however, the solubility regulations do not specify what exact concentration threshold applies to category 1 media
Answers to what you’re looking for can be found on pages P102 of Annexes A.1.3.3 and A1.3.4 of TSG21-2016; however, the solubility regulations do not specify what exact concentration threshold applies to category 1 media