The fault tree analysis of interruption of fluid in pump suction reverse circulation drilling 泵吸反循环钻进中循环液中断的故障树分析
3.
Suction piping for all pumps shall have at least five ( 5 ) times the nominal pump suction flange diameter of straight pipe upstream of the suction nozzle 所有水泵的吸水管道直径至少应有5倍于吸入口的上升直水管段的额定边缘直径。
4.
Suction piping for all pumps shall have at least five ( 5 ) times the nominal pump suction flange diameter of straight pipe upstream of the suction nozzle 所有泵的吸入管线应在吸嘴端上游具有至少( 5 )倍公称泵吸入直管法兰直径的长度。
5.
The base shall be of adequate height to provide suitable clearance between the pump suction elbow and the mounting floor and of sufficient strength to accept all forces imposed by the pump unit 这个基座应该具有适当的高度，使得泵吸入弯头与安装地面具有适当的间隙，并有足够的强度承受泵设备所产生的所有压力。
