放泄

• En773 general requirements for components used in hydraulically pressurized discharge pipes , drains and sewers
  液压放泄管道排雨水和废水系统组件一般要求
• En1293 general requirements for components used in pneumatically pressurized discharge pipes , drains and sewers
  气压放泄管道排雨水和废水系统组件一般要求
• Piping systems shall be designed and supported so that they can withstand recreation forces due to discharge of fluids
  管道系统应该这样来设计和被支撑，即，使它们能够经受得住由于流体的放泄所产生的反作用力。