公称通径DN法兰外径D螺栓孔中心圆直径K60螺栓孔直径L 螺栓螺纹Th数量n法兰外径D90螺栓孔中心圆直径K60螺栓孔直径L14螺栓螺纹Th数量n法兰外径D90螺栓孔中心圆直径K60螺栓孔直径L14螺栓螺纹Th数量n109014M124M124M12415956514M124956514M124956514M124201057514M1241057514M1241057514M124251158514M1241158514M1241158514M1243214010018M16414010018M16414010018M1644015011018M16415011018M16415011018M1645016512518M16416512518M16416512518M168PN0.6MPa(6bar)PN1.0MPa(10bar)PN1.6MPa(16bar)PN2.5MPa(25bar)PN4.0MPa(40bar) 6518514518M16418514518M16818514518M1688020016018M16420016018M16820016018M16810022018018M16423519022M20823519022M20812525021018M16827022026M24827022026M24815028524022M20830025026M24830025026M24820034029522M20836031026M241237532030M271225040534426M241242537030M271245038533M301230046041026M241248543030M271651545033M3016 1、 表中代号: D-法兰外径; K-螺栓孔中心圆直径; L-螺栓孔直径; Th-螺蚊规格; n-螺栓孔数量; 2、 以上为GB9112~913中DIN体系管法兰。