法兰密封面的平面度允差? 法兰密封面表面平面度的检查要求（适用于直接与设备相焊接的法兰以及管板的密封面）。 asme b16.5 （最大规格 dn600 ）允许的缺陷深度只能是凹下去的（不超过凸台高度），缺陷范围见该标准的表 -3 。而对于超出 b16.5 范围的设备法兰，密封面平面度的检查是至关重要的，国内标准还没有相关的内容。美国建设工业协会 cii(construction industry institute) 规范 pip vesv 1002-2007 (process industry practices--vessels) 给出了相应的规定。规定如下： for all flanges (except asme b16.5 flanges) and shop-fabricated lap rings, the gasket contact surface tolerance, in both the radial and circumferential directions, shall be 0.006 in. (0.15 mm) total indicator reading. measurements shall be made by a dial indicator after all other operations have been completed with regard to fabrication and heat treatment of the flange or lap ring and its attachment to the shell or nozzle neck that can affect flatness tolerance. the total circumferential tolerance shall not occur in less than 20 degrees arc. it is understood that the above applies to tubesheets that are extended to serve as flanges. 如此简单的英文，大家应该很容易理解，个人就不在此班门弄斧。 查看更多
第1天
关注盖德视界
添加小助手
