What are the definitions of toxic and non-toxic in pressure pipelines?
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Dear experts, I would like to ask about the definition of toxic and non-toxic substances in pressure pipelines: According to GBZ230, toxins are classified into categories of extreme, high, moderate, and low hazard. In TSG D0001, under the definition of GC1 toxicity, there are categories of extreme and high ； The toxicity of GC3 only states that it is non-toxic ； Do mild and moderate hazards fall under GC2? Is mild harm still defined as non-toxic? ?
The last edit to this post was made by bfdlwolf on 2019-5-16 at 14:03. The upcoming “Announcement by the State Administration for Market Regulation on Matters Related to Administrative Licenses for Special Equipment” (No. 3 of 2019) specifies the classification levels for industrial pipelines as follows: GC1 level: 1. Process pipelines that transport media with acute toxicity of Category 1 as listed in the “Catalogue of Hazardous Chemicals”, gas media with acute toxicity of Category 2, and liquid media with acute toxicity of Category 2 whose operating temperature is higher than their standard boiling point； 2. Process pipelines that transport flammable gases of Class A or B, or flammable liquids of Class A (including liquefied hydrocarbons), as specified in GB50160 \"Code for Fire Protection Design of Petrochemical Enterprises\" and GB50016 \"Code for Fire Protection Design of Buildings\", and whose design pressure is 4.0 MPa or higher ； 3. Process pipelines that transport fluid media, with a design pressure of 10.0 MPa or higher, or a design pressure of 4.0 MPa or higher along with a design temperature of 400°C or higher. GC2 level: 1. Process pipelines other than those of GC1 level; 2. Refrigeration pipelines. GCD level: Power pipelines. The toxicity level of the medium is determined according to the acute toxicity categories specified in the \"Catalogue of Hazardous Chemicals\", rather than according to GB5044-1985 \"Classification of Hazards from Occupational Exposure to Toxic Substances\"
Under normal conditions, GC3 is not specified for process pipelines; mild hazards are generally classified as GC2 as well
Personally, I think the definition of mild hazard should be non-toxic. It does not belong to pressure pipelines.