we are manufacturing tubesheet in accordance with RCS software but some of this not comply with API 660 Paragraph 7.6.2.2. Can we use this tubesheet without problem in performance of het exchangers? somebody know what is the reason for this paragraph? and exist some tolerance under for use this...
Can you please informe if the minimum distance related on paragraph 7.6.2.2 (minimum distance between edge of holes tubesheet and edge of all gaskets groove)can be avoid? we need use 50% less of that distance