Pressure piping:
Pressure piping, refers to the use of a certain pressure, for the delivery of gas or liquid tubular equipment, the scope of which is specified as the maximum working pressure greater than or equal to 0.1MPa (gauge pressure), the medium for gas, liquefied gas, steam or Flammable, explosive, toxic, corrosive, the maximum working temperature is higher than or equal to the standard boiling point of the liquid, and the nominal diameter is greater than or equal to 50mm pipe. Nominal diameter of less than 150mm, and its maximum working pressure is less than 1.6MPa (gauge pressure) of non-toxic, non-flammable, non-corrosive gas pipeline and equipment, except for the pipeline belonging to the body. Among them, the safety supervision and management of oil and gas pipelines should also be implemented in accordance with the "Work Safety Law", "Oil and Gas Pipeline Protection Law" and other laws and regulations.
Pressure vessel:
Pressure vessel, refers to the gas or liquid, carrying a certain pressure of the closed equipment, the scope of its provisions for the maximum working pressure is greater than or equal to 0.1MPa (gauge pressure) of gases, liquefied gases and liquids with a maximum working temperature higher than or equal to the standard boiling point, volume greater than or equal to 30L and the internal diameter (non-circular cross-section refers to the section within the maximum geometric size) is greater than or equal to the maximum boundary of the section, and the internal diameter is greater than or equal to the maximum geometric size (non-round section refers to the maximum geometric size) of the internal boundary. Boundary maximum geometric size) greater than or equal to 150mm of fixed containers and mobile containers; filled with nominal working pressure greater than or equal to 0.2MPa (gauge pressure), and the product of pressure and volume is greater than or equal to 1.0MPa?L of gases, liquefied gases and liquids with a standard boiling point equal to or lower than 60 ℃ liquid gas cylinders; oxygen tanks.