How is the term \"toxic\" defined in the definition of pressure pipelines? !
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Pressure pipelines refer to tubular devices that use a certain pressure to transport gases or liquids. They are defined as pipelines with a maximum operating pressure of 0.1 MPa (gauge pressure) or more, carrying gases, liquefied gases, steam, or liquids that are flammable, explosive, toxic, corrosive, and have a maximum operating temperature equal to or higher than their standard boiling point, and with a nominal diameter of 50 mm or more. Except for pipes with a nominal diameter of less than 150 mm and a maximum operating pressure of less than 1.6 MPa (gauge pressure), as well as the pipes that form part of the equipment used for transporting non-toxic, non-flammable, and non-corrosive gases. Among them, liquids: flammable, explosive, toxic, corrosive liquids, or liquids with a maximum operating temperature equal to or higher than their standard boiling point. How are toxic liquids defined, and which guidelines are used? !
The pressure pipeline standards define ranges for toxic substances
This post was last edited by Gan Dan Xiang Bo on 2025-5-22 09:01. Regarding the definition of toxicity for pressure pipelines, someone asked on the official website of the State Administration for Market Regulation; the reply was to refer to the \"Catalogue of Hazardous Chemicals\", and the introductory section of this catalogue lists the categories related to \"health hazards\", all of which can be considered toxic. (The category can be found in the ‘Hazardous Chemicals Classification Information Table’)
In academic studies*, the definition scope of pressure pipelines has been adjusted
This issue remains rather ambiguous. The previous TSG D0001-2009 defined categories such as medium-hazard, high-hazard, and extremely hazardous media, but there is disagreement among designers regarding whether this standard should still be followed, especially after so many administrative notices have been issued by the authorities； At present, the classification of pressure pipelines is based on the acute toxicity categories specified in the hazardous chemicals catalog and GB30000.18 – this is clear. However, it remains unclear whether the determination of whether a pipeline falls under regulatory oversight should be carried out using only the hazardous chemicals catalog and GB30000.18, or by applying both TSG D0001-2009 and the hazardous chemicals catalog plus GB30000.18.