Definition of pressure vessel in special equipment:
(1) Closed equipment containing gas or liquid and bearing certain pressure, Its range for maximum working pressure is greater than or equal to 0.1 MPa (gauge pressure) gas, liquefied gas and the highest standard of working temperature is higher than or equal to the boiling point of liquid, volume is greater than or equal to 30 l and internal diameter (non circular cross section refer to the section within the largest geometry) greater than or equal to 150 mm stationary containers and containers;
(2) full nominal working pressure is 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 gas, liquefied gas and standard boiling point is equal to or less than 60℃ liquid gas cylinder;
(3) Oxygen chamber.
Extended Information:
Pressure grade division
The design pressure (p) of the pressure vessel can be divided into four pressure grades: low pressure, medium pressure, high pressure and ultra-high pressure:
(1) Low Pressure (Code L)
0.1 MPa acuities were p < 1.6 MPa
(2) Medium pressure (Code M)
1.6 MPa acuities were p < 10.0 MPa
(3) High pressure (Code H)
10.0 MPa acuities were p < 100.0 MPa
(4) Ultra-high pressure (Code U)
P p 100.0 MPa.
Reference Materials:
Baidu Baike - Special equipment