90/10 CuNi for Sect 8, Div 1 Heat Exchanger
90/10 CuNi for Sect 8, Div 1 Heat Exchanger
(OP)
Hello All,
We are designing a heat exchanger for marine service. The customer has asked that the tubeside meet ASME Code Sec8 Div1 and be made of 90/10 CuNi. I'm making the Domes and Flanges out of SB171-C706. I don't see any CuNi in Sect 2 Part D for B16.5 flanges and B16.11 fittings. So I'm making couplings out of SB467-C706 XXS pipe. The required 1-1/2" NPT plugs are undefined however, because SB151-C706 is not permitted. My only other option seems to be to machine them out of SB171-C706.
Am I missing something? My google-searches for 90/10 fittings have come up empty, as have my searches in Eng-Tips for guidance. Are there 90/10 CuNi fittings and flanges available for Code use? Or can I propose an alternate material to the customer?
Thanks for helping me move up the learning curve here.
We are designing a heat exchanger for marine service. The customer has asked that the tubeside meet ASME Code Sec8 Div1 and be made of 90/10 CuNi. I'm making the Domes and Flanges out of SB171-C706. I don't see any CuNi in Sect 2 Part D for B16.5 flanges and B16.11 fittings. So I'm making couplings out of SB467-C706 XXS pipe. The required 1-1/2" NPT plugs are undefined however, because SB151-C706 is not permitted. My only other option seems to be to machine them out of SB171-C706.
Am I missing something? My google-searches for 90/10 fittings have come up empty, as have my searches in Eng-Tips for guidance. Are there 90/10 CuNi fittings and flanges available for Code use? Or can I propose an alternate material to the customer?
Thanks for helping me move up the learning curve here.





RE: 90/10 CuNi for Sect 8, Div 1 Heat Exchanger
I just design the flanges per Appendix 2. Don't know about fittings.
Regards,
Mike
RE: 90/10 CuNi for Sect 8, Div 1 Heat Exchanger
RE: 90/10 CuNi for Sect 8, Div 1 Heat Exchanger
Plugs? Several US manufacturers make them out of MIL-C-15726F barstock, they may be able to give you some guidance on an equivalent ASME spec.
Google "copper and brass fittings". Several of the vendors we've used in the past for C706 and C715 fittings and flanges are on the first page of the results. I'm sure they have some answers.
-TJ Orlowski
RE: 90/10 CuNi for Sect 8, Div 1 Heat Exchanger
RE: 90/10 CuNi for Sect 8, Div 1 Heat Exchanger