Brazed Al heat exchangers are manufactured by a very few specialist manufacturers (see the industry organisation ALPEMA, referred to above). Their brazing techniques are proprietary & probably company secret and, if you use Chart, Norden Cryogenie, etc. you do not have to insist on ASME brazing...
Colleagues,
I'm conducting a straw poll on general good practice in ordering bolts for pressure vessels (not a question on what is mandatory due to international codes).
Is it satisfactory to use flange bolting which only has a certificate of conformity (2.2) rather than a mill cert (3.1)? I...
Exactly right, SnTMan, and thanks.
However, same thing with DJ for example . My point was more out of general interest - does anybody (owner or fabricator) use that formula? I use Finglow program which invokes it, but I usually ignore it because it's not in App 2. But is that formula...
Taylor Forge's 'Modern Flange Design' used to have a formula to find the minimum gasket width which was based on the idea that gaskets would crush as a stress equivalent to twice the seating stress 'y' (I'm doing this from memory!). If I apply it to large medium pressure heat exchanger girth...
I notice you have free H2 in the shellside. Depending upon partial pressure of the hydrogen relative to tubeside, you might have to consider the TEW (if you impose one) to be in hydrogen service. So DO NOT seal roll behind the weld, as you may trap H2 there, with the potential for the weld to...
pve5,
You do not mention whether there are any specific considerations in your case (for example two fluids which MUST NOT intermix). So I'll take it that you have a fairly standard set-up: say hydrocarbon one side and steam or water the other. In such a case, with your temperatures and...
Hello.
The difference appears to be in the addition or otherwise of filler metal. Welded SA312 does not have filler metal added and so does not require a partial data report; SA358, on the other hand, does.
I like to specify ERW HX tubes (carbon or stainless) wherever I can. The trouble is...
.. and the 60, 65, 70 etc of SA516-** is the minimum tensile strength in thousands of psi, as defined in Code, but you probably know that. Just couldn't tell from your posting.
A or B refers to the subsection of section II, i.e., ferrous or non-ferrous respectively.
Inside the body of the stainless steel designation, WP is wrought pipe, TP is tubular product (not "type"!), F is forging. I'm sure there are exceptions, but if you see SA420-WPL6 you should think...
