Regarding to Blind flange 4” 150# RF SA182M Gr304 ASME B16.5 of Item V-201,V-211,V-221(Total Q'ty 3 EA). After checked In the shop DWG. It don't show the detail of blind flange's drilling (N10). But Blind flange 4" of 1st priority items( 3 EA) had been drilled through all (Machining) by operator already. the detail please see the attachment.
However, For keep test schedule of these items(around 1st week of Feb 2014). I think we should replace Blind flange 4” 150# RF SA182M Gr304 ASME B16.5 from item as below;