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As per ASME VIII div 1, UG-46 : "All vessels 18 in. (450 mm) to 36 in. (900 mm), inclusive, I.D. shall have a manhole or at least two handholes or two plugged, threaded inspection openings of not less than NPS 2 (DN 50)." "(7) Flanged and/or threaded connections from which piping, instruments...

Thanks for the reply. I have another heat exchanger which i did not mention in earlier post as below exchnager 3: exchanger 1 : 1200 (ID) x 6300 (tube length) exchanger 2 : 1050 (ID) x 6000 (tube length) exchanger 3 : 1200 (ID) x 5700 (tube length) I need to choose 2 of them to be stacked and...

Forgot to mention they are U tube type exchangers which require bundle removal during maintenance.

Hi all, I have a query regarding stacked shell & tube heat exchangers. I have 2 nos shell & tube heat exchanger for different services (with different design conditions) with below details: exchanger 1 : 1200 (ID) x 6300 (tube length) exchanger 2 : 1050 (ID) x 6000 (tube length) since they...

Thanks all for the comment [thumbsup2]. Appreciate very much.

Thanks for the reply. Yes, i understand that 650-I-33/99 section 3.7.4 is equivalent with 5.7.4. That's why it contradict with S.3.3.2. Am i correct that the statement "regardless of the material used" of Appendix D 650-I-33/99 only applied to all materials other than stainless steel?

Does a stainless steel flush-type clean out fitting requires thermal stress relief? According to clause 5.7.4.1, all flush-type clean out fitting require thermal stress relief. While Appendix D section 3.7 - 650-I-33/99 also states that stress relief is required regardless of the material...