Finally,the horizontal frost-heaving stress against row-piles without pressure relief holes is 0.238 MPa,which is obtained by test firstly. And the average horizontal frost-heaving stress against row-piles with pressure relief holes is 0.133 MPa.
ASME Ⅷ-1 UG125~UG137 describes that the rated flow capacity of a pressure relief system which uses a rupture disc devices as the sole relief devices shall be determined by a value calculated under the requirements of using a coefficient of discharge or using flow resistance coefficient K_R.
Safety facilities for catalytic reforming unit, such as interlock of low flow recycle hydrogen, anti-surge system of centrifugal recycle hydrogen compressor, multi-flow control and low flow protection of reboiler as well as the emergency pressure relief of hydrogen system have been discussed.
It may also be necessary to introduce equipment for pressure relief or pressure suppression.
Indirect perceived control was a particularly important predictor of pressure relief, accounting for 24% of the variance.
The resulting pattern of pressure relief and of shaft inflow is calculated for typical practical situations for an open circular shaft and also for a shaft protected by an annular zone of grouted ground.
The pattern of pressure relief produced in a confined aquifer by a ring of vertical relief wells is conventionally evaluated by summation of simple contributions from individual wells.
Ground water pressure relief wells in shaft sinking