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RE: [PSUBS-MAILIST] Questions for Phil..
I
bought it, and it cost around $150. That might seem pricey for a few
loose pages, but for those unfamiliar with this ASME publication, it
contains really valuable (I would even say essential) information for
designing acrylic viewports. I strongly recommend it to anyone designing or
building their own viewports.
PVHO is 99% about viewports and piping. The
reference to welding is so small I'll transcribe some of it below. I
want to clarify I am not really certain of what it is saying for lack of the
referenced documentation.
"1.4.1
Joint Design. All PVHOs shall be designed with joints as
follows.
(a)
All joints of categories A, B, and C shall be Type No 1 of Table UW-12 for
Division 1 vessels or shall comply with AF-221 for Division 2 vessels, except as
permitted in (c) below.
(b)
All joints of Category D shall be full penetration welds extending through the
entire thickness of the vessel or nozzle wall. Backing strips shall be
removed.
(c)
..."
I
don't know what those joint categories are, but I am assuming D would be the
critical ones. Neither do I have table UW-12. I think all this stuff is in
Section VIII, a different ASME publication which I don't yet have my hands on.
Perhaps someone with Section VIII handy can educate the rest of us on these
items?
rgds,
-
Alec
Hi Alec!
That's really good news. I use the
electrodes a lot; did on my NAUTILUS, too. A couple years ago somebody
on this forum said that was contrary to PVHO, and said continuous feed was
required. I didn't have a copy, so there wasn't much I could say.
But if such is not the case, I for one am glad to hear it.
BTW: Where did you get ahold of the PVHO
at? Borrow it? Or if you bought it, how much does it cost
now?
VBR,
Pat
----- Original Message -----
Sent: Friday, August 10, 2001 12:51
PM
Subject: RE: [PSUBS-MAILIST] Questions
for Phil..
Pat,
I
just checked the current PVHO. It specifies full-penetrations welds, but
doesn't tell you what welding technique to use.
rgds,
-
Alec