压力管道设计审批测验题(国外英文资料).doc

压力管道设计审批考试题(国外英文资料) Pressure piping design approval examination questions Work units: Name: score: 1, fill in the blanks (1 minute, 20 points) At the critical temperature, the pressure required to convert the gas to liquid is called. The gas is called in this state. The parameters in this state are called. (critical pressure, critical state, critical parameters) The mechanical properties of a metal are the mechanical properties of the metal, which are shown below. (the function of external forces) When the vapor is cooled or pressurized, it becomes liquid to the surface of the contact or condensation nucleus. The temperature under this pressure is called. The temperature at which the vapor pressure of the liquid is equal to the external pressure is called the liquid under the pressure. (dew point, boiling point) 4, gas pipeline directly open hole in the head and the branch connection, weaken its opening part according to area of reinforcement, such as when a branch pipe nominal diameter less than or equal to the mm, not reinforcing. When the outer diameter of the branch is greater than or equal to, it is advisable to use standard three parts or welding three parts. (50, 1/2) It can be used when the outside diameter or the outer diameter of the protective layer is less than or equal to 50mm. (sign) 6, material selection of pressure pipeline, should according to special requirements, and the medium conditions and materials such as processing performance, welding performance and economic rationality, etc. (pipe level, design temperature, design pressure) 7, according to different manufacturing methods, steel pipes and divides into two broad categories. (seamless steel tube and welded steel pipe) 8, pressure piping flange sealing gasket has three categories, respectively, and. (non-metallic gaskets, semi-metal gaskets, metal gaskets) The choice of pipeline coating should be used in accordance with the piping coating. (surface material, environment) Valve should be inst