HG5010-58 (JB81-59)平焊钢制法兰HG5014-58对焊法兰公称公称    压力直径PN0.252.5PN0.66PN1.010PN1.616PN2.525PN0.252.5PN0.66PN1.010PN1.616PN2.525DN100.2540.3130.4580.5470.6340.2840.3440.5150.6090.696DN150.2900.335