HG20592～20635-97钢制管法兰、垫片、紧固件.pdf 538页

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HG20592～20635-97《钢制管法兰、垫片、紧固件》重要修订、勘误通知(第1号修改通知单，2001年6月)全国化工设备设计技术中心站1．P5、P6和P9平焊环松套法兰的代号应修改为：PJ/RJ2．P36和P48第4节“法兰尺寸”的未尾增加一段：采用B系列钢管外径的DN350～900法兰，应在法兰的螺栓支承面，以螺栓孔为中心，锪出下表所列直径的平面，适用于紧固件的装配。锪平面与法兰的螺栓支承面齐平，允许与法兰颈部大端直径N或转直R相交。螺栓尺寸螺栓孔直径L锪平面直径M202240M242648M273053M303361M333666M363971M394276M4548893、P321图4-1中PN≥11.0MPa法兰高度H的尺寸线应修改为：法兰小端端部至包括法兰厚度C的距离(不包括f2)。4．P328表4-6中DN250法兰的螺栓中心圆直径K值应修改为539.5mm。5．www.bzfxw.comP477和P478表4.0.2中PN2.0～26.0MPa的表头，应按下列修改(表中数字不动)： 误正环高环高八角形H椭圆形B椭圆形B八角形H6．P479续表4.0.2应修改为：续表4.0.2(mm)公称通径PN42.0MPa(class2500)环高NPS(in)DN环号R节径P环宽A环平面宽度C椭圆形B八角形H1/215R1342.887.9414.2912.75.233/420R1650.807.9414.2912.75.23125R1860.327.9414.2912.75.2311/432R2172.2411.1117.4615.887.7511/240R2382.5511.1117.4615.887.75250R26101.611.1117.4615.887.7521/265R28111.1212.7019.0517.468.66380R3212712.7019.0517.468.664100R38157.1815.8822.2320.6410.495125R42190.519.0525.423.8112.326150R47228.619.0525.423.8112.328200R51279.422.2328.5826.9914.8110250R55342.928.5836.5134.9319.8112300R60406.431.7539.6938.122.33www.bzfxw.com'