1、UDC621.643.4:629.4U55中华人民共和国国家标准GB1074510751-89GB25012508-89船用法兰(四进位)Marine pipe flanges1989-03-31发布1989-12-01实施国家技术监督局发布GB2504-893.2公称压力P为0.25、0.6、1.0、1.6、2.5MPa法兰的尺寸按图1和表2。其余9DD图1表2mm公称法兰法封括平螺栓螺纹及通孔沉头座通径直径b中DTh.d直径Pw=0.25、0.6MPa1075123505205551050M101124140004536165M121426新05场4001024091052180020M1
2、6183222a12415M202216GB2504-89续表2mm公称兰法兰颈密封面括平螺栓螺纹及通孔沉头座通径直径DDRD0T h直径Pw=0.25、0.6MPa4005210多16595M202240506460542090870567655M24264800名1275760885品90010751020950980965M27305410001175112010501080106528PN=0.25MPa12001375132012641280126531400152031480148016017901730168016905M273040541800199019303618781890187515442000219021303820822090207548PN=0.6MPa12001405134028126412951279M3033326014001601480151049336160016801101693M333640661800204519703618781519201898M36394472200022652180好208221252102M39424878=1.0、1.6MPa9060421520055533M1214426多16
