根据API RP 2A, 静水压溃计算时杆件在轴向受拉情况下，基本的安全系数为1.67，为定数，在SACS中为默认值，所以在SACS中HYDRO卡中41-50列仅提到轴向受压安全系数（Axial Comp. Safety Factor）。这个受拉的安全系数在list 文件中POST分析结果报告第一页可以查看，如下所示：

                              HYDROSTATIC PARAMETERS

                                       .... VERTICAL COORDINATE........... +Z

                                       .... WATER DEPTH ...................     20.00 M        

                                       .... MUDLINE ELEVATION .............   -20.00 M        

                                       .... WATER DENSITY..................     10.28 MT/M**3  

……

                                       .... BUOYANCY OPTION................     MARINE

                                      .... ALPHA FACTOR ..................     0.800

                                       .... SAFETY FACTORS

                                                   AXIAL COMPRESSION.......     2.000

                                                  AXIAL TENSION...........     1.670

                                                   HOOP COMPRESSION........     2.000

API RP 2A 21st 版静水压溃计算安全系数：