Pipe and valve knowledge: [Question of the Day] 2011-01-18
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This post was last edited by security on 2011-1-17 08:41. Those that meet all three criteria of toxicity, flammability, and design pressure/temperature are classified as ( ) grade. A、GC1 B、GC2 C、GC31) All participants will receive a reward ； :) :victory: 2) Please hide your replies; the method for doing this is: http://bbs.hcbbs.com/thread-492556-1-1.html. Do not edit the replies after posting them. 3) Answer: The answer is C. Refer to Page 15 of the Implementation Guidelines for GB/T 20801-2006 \"Code for Pressure Piping – Industrial Piping\"
A. GC1: According to the classification principles for pressure pipelines, a GC1-grade pipeline meets one of the following conditions: (1) It is used to transport media that are classified as having an extremely high level of toxicity according to GB5044, the Standard for Classifying the Hazards of Occupational Exposure to Toxic Substances； ⑵Pipelines that transport flammable gases of Class A or B, or flammable liquids of Class A, as specified in GB50160 \"Code for Fire Protection Design of Petrochemical Enterprises\" and GBJ16 \"Code for Fire Protection Design of Buildings\", and have a design pressure of P ≥ 4.0 MPa ； " ⑶Pipelines for transporting flammable fluid media and toxic fluid media, with a design pressure of P ≥ 4.0 MPa and a design temperature of 400°C or higher ； ⑷Pipelines that transport fluid media and have a design pressure of P≥10.0MPa.