ASME Section VIII Div 1. - UW-13.2 Attachment - Heat Exchangers
ASME Section VIII Div 1. - UW-13.2 Attachment - Heat Exchangers
(OP)
Good Morning,
I am currently working on a vertical orientated heat exchanger (evaporator) and have a question regarding the tube sheet to shell welds. This heat exchanger has a section of shell on both sides of the tube sheets and I intended to weld both sides via UW-13.2 (d). I have been informed the if we are going to weld per UW-13.2 (d) on both sides of the tube sheet that dimension tp must be multiplied by 2. This is an issue as it would drastically increase the tube sheet thickness well beyond the required thickness per ASME calculation. In the past we have not had any trouble overlapping dimension tp so long as at least tp was maintained between the two welds. I cannot find anything in Section VIII Div 1. to confirm or deny my findings. Any assistance would be appreciated as I look forward to resolving this issue.
I am currently working on a vertical orientated heat exchanger (evaporator) and have a question regarding the tube sheet to shell welds. This heat exchanger has a section of shell on both sides of the tube sheets and I intended to weld both sides via UW-13.2 (d). I have been informed the if we are going to weld per UW-13.2 (d) on both sides of the tube sheet that dimension tp must be multiplied by 2. This is an issue as it would drastically increase the tube sheet thickness well beyond the required thickness per ASME calculation. In the past we have not had any trouble overlapping dimension tp so long as at least tp was maintained between the two welds. I cannot find anything in Section VIII Div 1. to confirm or deny my findings. Any assistance would be appreciated as I look forward to resolving this issue.





RE: ASME Section VIII Div 1. - UW-13.2 Attachment - Heat Exchangers
RE: ASME Section VIII Div 1. - UW-13.2 Attachment - Heat Exchangers
Anyway, I have always used tp x 1.
Regards,
Mike
RE: ASME Section VIII Div 1. - UW-13.2 Attachment - Heat Exchangers
RE: ASME Section VIII Div 1. - UW-13.2 Attachment - Heat Exchangers
Regards,
Mike
RE: ASME Section VIII Div 1. - UW-13.2 Attachment - Heat Exchangers
Thanks for the response. In this situation it was the AI reviewing the documentation of an already completed tube sheet. If it need to be 2tp we needed to scrap the completed part and start over. I have received word from the AIA informing me that we are building to code with 1tp. Have a good day.
RE: ASME Section VIII Div 1. - UW-13.2 Attachment - Heat Exchangers