Pressure pipeline:
Pressure pipeline refers to a tubular device that uses a certain pressure to transport gases or liquids. Its maximum working pressure range is greater than or equal to 0.1 megapascals (gauge pressure), and the medium is gas, liquefied gas, steam, or flammable, explosive, toxic, or corrosive gases. Its maximum working temperature is higher than or equal to the standard. Liquid boiling point, nominal diameter greater than or equal to 50 millimeters. Pipelines that transport non-toxic, non flammable, and non corrosive gases, as well as pipelines belonging to the equipment body, do not include pipelines with a nominal diameter less than 150 millimeters and a maximum working pressure less than 1.6 megapascals (gauge pressure).