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Thanks all. rneill, Yes, the PRVs (made by Tyco) have CRNs. But unfortunately, the inlet flanges provided are 250# while i got receiver tanks that have been fabricated and hydro'd with 150# flange. CRN's pretty much has been the story of my life for the past year and 1/2 =) Canadieng, A...

thanks rconner. I like the more compact special "Flange Adaptor" solution but I am trying to find one that has CRN (since it will be installed in Alberta Province) and one suitable for pneumatic application. Anyone with information of a supplier that can satisfy the above would be much...

Nevermind, it seems that it doesn't work afterall due to the difference in Bolt Circle...

Hi all, Just have a real quick question: I am nowing dealing with flange rating question concerning SRV (Set Presure at 150 psig) which has 4"-250# inlet connection. But the pressure veseel this SRV is to be mated to happens to have 4"-150# which I believe is not intended. So the quesiton...

MrBTU - thermal analysis now seems to show mean metal temperature to be less than 300F. yes, it is difficult to imagine tube temperature to exceed 300F but think we have to consider design temperature of shell that is limited by the hot air. unclesyd - tube proper is point contention. Any...

coolant = water in tube cooled medium = AIR in the shell air tempearture is in the first post. water temp is 30-40 C.

Thanks MrBTU. However, I am still concerned with what TomBarsh who pointed out that ASME UG-20(c) specifies that "design temperatures for vessels under external pressure shall not exceed the maximum temperatures given on the external pressure charts." I suspect the tube's mean metal temp may...

how about from non-ASME member?

I am not a full-time B&PV engineer but I am now faced with a question from someone reviewing a fin-and-tube heat exchanger design that needs to be commissioned quickly. Reviewer is having concern with tube with material SB-111 C12XXX with Design Temperature of 400F exceeding those allowed by...

Is there anyone familiar with CSA requirment to provide disconnect switch for control circuit inside NEMA Panel? Basically, I am dealing with a piece of equipment consisting 600 vac for resistance load and 120 vac (step-down from 600 vac) for control circuit. 600 vac feed to high-voltage...

Hi, does anyone have any good recommendations for Copper Plating vendor located in U.S. that can handle large part (100"x 45" x 45") made of aluminum? Thanks.

Thanks pwrengrds - that was helpful. Now to see whether CSA has a similar table. It seems that CSA might be written based on NEC sometimes.

We have vendor supplying a NEMA 4 box for Surge Arrestor/Capictor application and our customer stated that the sidewall clerance is small and may not meet required CSA or IEEE code from live parts to grounded surface. Could you let me know if there is such a requiremetn out there? Especially...

Hi everyone, I have a few basic questions as I am currently dealing a web distortion issue found in welded box girder (double overhead running): 1. Is permissible to for butt weld of girder web? In my case, I was told butt-welding is required because bridge span is quite long. 2. Is AWS...