公制螺纹参数简明表标准螺纹外螺纹大径内螺纹小径M121,25M121,251211,647M121,75M141,51211,376M1421210,106M161,5M1621412,376M181,5M1821411,835M182,5M201,51614,376M202M202,51613,835M221,5M2221816,3761815,8351815,2942018,3762017,8352017,2942220,3762219,835M222,52219,29425,376M271,52724,83523,752M2722728,37627,835M2732726,21131,376M301,53030,83529,211M3023033,83532,752M303,53031,67036,835M331,53335,752...
给水管与其它管道和建筑结构之间的净距排水管室地沟水垂内壁和平直墙给水管道其它梁、柱净净面备注名称管道设备距距((((mmmm)mmmm)))引入管100150在排水管0上横干管10010050(无焊500150在排水管缝)上管径(mm)25<32立管32~503575~10050125~15600预留孔洞尺寸(mm)管道名称明管暗管项墙槽尺次管道排列留孔尺寸寸管径宽度×1采暖或给水立管深度长×宽130×130≤25100×100150×132~50150×1503070~10200×200200×20...