----- Original Message -----
Sent: Friday, August 10, 2001 5:57
PM
Subject: 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