RTP标准翻译Large diameter body flanges? 4-200 Large diameter body flanges Body flanges shall be flat and true to a required tolerance given in Table-4. If machining of the flanges is required,the machined surface shall have the original corrosion barrier restored and sealed with resin.All bolt holes shall be back spot-faced for ASME B18.22.1 Type A Narrow washers. 查看更多7个回答 . 3人已关注