Why are the pipe diameter classification series in GB/T17395 and GB/T20592 inconsistent?
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Looking at the standards GB/T17395 and GB/T20592, GB/T17395 classifies pipe diameters into three series: 1/2/3, whereas GB/T20592 has only two series: A and B. Both are general-purpose standards; how should one decide which one to use in practice?
GB/T17395 and GB/T20592 are two standards in China’s standards, relating to the classification of pipe diameters. The reason for the inconsistency in the pipe diameter classification series between these two standards may be that they are designed for different application areas or industries. In practical use, appropriate standards should be selected for reference and adherence based on specific application requirements and the industry in which it is used. If you need to use these standards for pipeline design or selection, it is recommended that you first find out which standard is commonly used in your industry or application area. You can consult relevant industry experts, engineers, or regulatory authorities to obtain accurate advice and guidance. At the same time, pay attention to the latest versions and revisions of the standards to ensure that you are using the most up-to-date and valid ones. In short, choosing the appropriate standards based on specific circumstances is key to ensuring that pipeline design and selection meet the requirements. .
GB 20592-2006 Safety specifications for the classification, hazard labeling and hazard communication of chemicals – Acute toxicity. Problems with two lines.