Recent content by rab1944

Would someone please define t2a in API 650 Section 5.6.4.5 (Variable Design Point). Thanks

Thank you for the feed back. The problem we are running into are customers who insist on x-raying the butt joint between top angle and shell.

What is the preferred method of attaching the top angle to the top of a tank shell, lap welded (Figure F-2 Detail b) or butt welded (Figure F-2 Detail d).

What is the logic in API 620 Section 6.9.2 (11th edition add 1)in allowing plates to not be staggered? Thanks

1. This is the customer idea. 2. I'm a tanky and not a painter. Thanks for the response.

Is there any restriction on welding a thin gauge less corrosive sheet material over the existing tank shell and bottom. This would be done with lap welds and plug welds. Thanks in advance

I would like to place an NFPA 22 Fire Water Tank on a ringwall foundation. The tank is about 40' dia. Given the options for protecting the bottom underside, it would seem at first glance that the sand/lime mix with a ph of 6.5 to 7.5 would be the best option. However, finding the proper...

Would a spray-on insulation work in this application.

Can anyone give me the link to API Agenda Item 620-285 Appendix X Revision 4? Much appreciated.

It is rare for an Appendix F tank to not be anchored. Have you checked out Section 5.2.1(k)2: The design uplift presure on the roof (wind plus internal pressure)need not exceed 1.6 times the design pressure P determined in F.4.1. Also of interest are the 30 May 09 posts regarding wind...

Ok, let me try this again. I meant to ask about API 650 Add 2 Apx. Y

Does anyone have any insite to share regarding the new Monogram and Licensing Program discussed in APx Y?

It sounds like you have an Appendix F tank with the 0.3 psi design pressure. Apx. F will inturn direct you to API 620 for the design of the manways. Happy hunting.

What about the use of Duplex 2101 for plate and 2205 for pipe. The 2101 cost is somewhat competitive to 304L.

OK I'll bite. I found nothing in API 650 either, but obviously you would need a bw annular plate. The breakdown would be impractical past 3/8" and the three plate laps would be a challenge for an earthling. I also checked Euronorm and found nothing. AWWA D100-05, however, Section5.9.4.5...