I believe that you are looking for what is called a "Pipe and Bottle Clamp" with or without belting material. I was involved in a project in which Southwest Reasearch Institute did an acoustic "analog" analysis of a piping system on a reciprocating compressor. (10,000 HP)...
You are correct in that the Blodgett method is used in determining weld size. What you have to keep in mind is that your maximum fillet weld size that you should consider in your calculations is limited to the thinest section you are welding less 1/16". What will and does happen, is that...
I was involved in the installation of a 2" caustic line which was not stress relieved. It was traced with a pre-insulated "Dekeron" tube to prevent overheating in the line.
Within 1 year, numerous cracks appeared at the welded joints and the line had to be replaced with a stress...
There is a publication from Dupont titled:
"Welded or Seamless Heat Exchanger Tubes, That is the Question" by Mike James.
This talks about the difference and the pros and cons of each.
You can get this off of thier website.
The CRANE Valve Engineering Data handbook has NPT thread information listed in a single page from sizes 1/16" to 24" OD.
It references ANSI Std. B2.1 at the bottom of the page.
The FEA using Nozzlepro or FEPipe is aok to use if you have these tools.
A simple approach that I have used with round or structural attachment is the line load method given within section 7.6 of the Pressure Vessel Design Handbook - Bednar, 2nd. edition.
Good Luck.
I am not aware of the procedure in Moss for the design of vessel on rings.
I am familiar with the method in Bednar and Jawaad/Farr texts. This is the method that I believe that some of the software uses.
These are both based on the method in Blodgett titled "The design of Hangers and...
If this valve is leaking at the end flange or bonnet flange, you could consider "Furmaniting" the flange to stop the leak. The valve could then be replaced on your next outage.
If it is a packing leak, the vessel should be taken out of service and have the valve replaced.
Typically, you could test to 1.5 times the maximum flange rating at ambient temperatures. For carbon steel A105 flanges, this is 1.5 x 740 = 1125 psig.
The catch here is that on large diameter piping, you could go beyond yield if you use this rule indiscrimately. You should check piping stress...
I had mentioned in my previous reply that the Coade and Compress software was specifically for mechanical design and analysis.
Prior to these programs being developed, the industry leader was B-Jac. This software can do thermal and mechanical design of heat exchangers,and prepare cost...
I have used PVElite for full vessel analysis and Codecalc for component analysis for a number of years. It does support the codes that you mention. It also support pre 1999 ASME stress values. It is available from COADE.COM
Another program which is of equivalent capability is COMPRESS. I do...
