This is a nice idea from a cleanliness and ease of installation, but it is
not allowed in the USA, as it is in direct conflict with NFPA 30 (fire
code), and I've never encountered milk tube compatible valves that comply
with API 607 for fire safe shut-off and containmnet for flammables.
There are some fittings that are made in Europe that meet the intent of
these codes and standards, but they are not stocked in sizes less than 2 or
2 1/2 inch by anyone in N. America. Because they aren't sold or stocked
here, tbey haven't been approved for flammables. They are designed in such
a way that they meet the intent of the code.
If they are approved for use in NZ, go for it.
... Bruce D. Bullough ...
Sebesta Blomberg & Associates
2381 Rosegate
Roseville, MN 55113
651-634-7344 (office)
651-634-7400 (FAX)
www.sebesta.com
-----Original Message-----
From: geoff stone [mailto:blenrayaust@yahoo.co.uk]
Sent: Tuesday, October 16, 2001 5:26 PM
To: <a href="/group/PipingDesign/post?postID=_EdTwof19Q65r7nWbdR-ntj_Euoqep69-FXvLcAcMryv334prr63_cu-qAbk-lpx1PBJW921a18Yd0iQaFYzK0x-yN_K">PipingDesign@yahoogroups.com</a>
Subject: Re: [PipingDesign] Paint Pipelines
one pipe system you could consider is that used in
dairies. This involves 18 swg tube 316 ss rather than
CS pipe. The concept of couplings, valves etc is all
geared towards not having crevices where the nasties
can grow. Just what you are looking for in terms of
reducing contamination.
Individual lines is certainly worth considering.
Pigging lines after each batch with solvent/water &
air/N2 to leave them empty is good idea.
We have found it to be cost competitive to use SS milk
tube vs CS painted pipe.
We built the paint factory for Jotun in Thailand.
- Nichols <enichols@bbtel.com> wrote:
<HR>
<html><body>
<tt>
I would recommend s/s or other material that would be
corrosion free and
compatible to product. Also recommend using full bore
ball valves for the
system. Long radius bends are an asset but can use 1.5
ells for pigging. My
experience regarding painting or other similar
"finished" materials systems
is to have deicated pipe lines for each product, if
cost effective. This
eliminates the need for solvent flushing and drying to
guard against
cross-contamination.
> Forum Members,
>
> I am seeking advice on how to design piping for
paint transfer. The
> application involves pumping primer from bulk
tanks to process and back, a
> distance about 100 metres each way.
Assumptions are to use TP 316 or TP
> 2205 pipe material, flow requires either 1 1/2 or
2 inch bore. Has anyone
> experience with piping paint over this
distance? Are there any pitfalls
to
> watch for, like contamination issues? Is CIP
cleaning recommended by back
> flushing or pig?
>
> I look forward to receiving your comments.
>
> Glenn
>
> Tel, (09) 520 2360
> Fax, (09) 520 2363
> Email: <a href="/group/PipingDesign/post?postID=WalAQKweG3JOCHoXGaQ0RbkDPW9_1VpGZlx_kUilICIkkAeO5asJ88ydk8LLJPOPL3mlcQA1_HMjcqsMBw3bh8HrtctWvxt6s5JkDHU">glenn.dillon@task-consultancy.co.nz</a>
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Received on Wed Oct 17 08:52:00 2001
