[dd251] Re: Flexible Pipe
- From: <rapidrop@xxxxxxxxxxx>
- To: <dd251@xxxxxxxxxxxxx>
- Date: Wed, 29 Jan 2003 07:24:43 -0000
Jeannete,
As you may know Rapidrop is our own brand of corrugated stainless flexible
sprinkler connections LPCB approved and UL Listed which are ideal for
armover connections to sprinklers in suspended ceilings. We have not
offered them for Residential for various reasons (real or perceived). Low
supply pressure and pressure loss being amongst them.
I only just found out about the forum and joined this last weekend so I do
not know your questions. If you let me know I will see if we can offer a
solution or explain why we can't.
Brgds
Alan Stimpson
Fivalco Ltd.
----- Original Message -----
From: "Jeannette Baxter" <j.baxter@xxxxxxxxxxxxxxxxxxxxx>
To: <dd251@xxxxxxxxxxxxx>
Sent: Tuesday, January 28, 2003 8:28 PM
Subject: [dd251] Re: Flexible Pipe
>
> on 28/1/03 12:38 pm, Gill, Chris at GillC@xxxxxxxxx wrote:
>
> >=20
> > Jeannette
> >=20
> > You are correct in saying that pipework in these risks is a critical
issu=
> e
> > but we are concerned that there are some in the industry out for a quick
> > fix. Our experience with new piping products for sprinkler systems has
> > shown that great care has to be taken to ensure that not only the
product=
> s
> > are suitable but that the installation is carried out correctly. I'll
> > address these issues separately:
> >=20
> > Product - given the issues surrounding whether to protect the entire
> > residential/domestic property or not, the matter of running sprinkler
> > pipework through unprotected areas needs consideration, approved CPVC
> > pipework for instance has limitations placed upon its use where it is
> > exposed (see TB32) and similar limitations would have to be placed on
its
> > use in residential/domestic properties.
> >=20
> > The flexible drop pipes that we have approved are also subject to
> > limitations, this time related to pressure loss. Given that many
flexibl=
> e
> > pipes are of a corrugated type and that with DD251 systems we are at the
> > already running with very low pressures this issue becomes very
important=
> .
> > How is the different hydraulic nature of flexile pipe to be taken
account=
> of
> > in design?
> >=20
> > Other issues such as mechanical damage, supports and operating
temperatur=
> es
> > also need to be considered.
> >=20
> > I believe someone mentioned the use of lay flay hose for sprinkler
system=
> s;
> > this simply isn't an option here, lay flat hose is designed to run at
muc=
> h
> > greater flow and pressure which can deal with most kinks etc which may
> > occur. This wouldn't be the case in a residential/domestic property.
Ri=
> gid
> > hose may be a possibility as this may in fact perform better
hydraulicall=
> y
> > than a rigid system, but the proper assessments need to be carried out.
> >=20
> >=20
> > Installation: We would all accept that the installation of sprinkler
> > systems requires a greater deal of care and understanding than a
plumbing
> > system. Given that even in the relatively well supervised world of
stand=
> ard
> > sprinkler installations we hear of terrible incidents of lack of care
(CP=
> VC
> > systems only being dry fitted for instance) we cannot stress how
importan=
> t
> > it is that the proper training be given to designers and installers of
th=
> ese
> > systems, particularly if flexible pipework becomes prevalent.
> >=20
> >=20
> > We are totally in support of the development of residential/domestic
> > sprinkler protection but we must be careful not to compromise on
performa=
> nce
> > in order to fit the existing products into a new risk.
> >=20
> > Regards,
> >=20
> > Chris Gill
> > Technical Manager
> > For and on behalf of, LPCB
> >=20
> > -----Original Message-----
> > From: Jeannette Baxter [mailto:j.baxter@xxxxxxxxxxxxxxxxxxxxx]
> > Sent: 28 January 2003 10:48
> > To: dd251@xxxxxxxxxxxxx
> > Subject: [dd251] Flexible Pipe
> >=20
> >=20
> > I'm not sure whether or not my mails have been posted to this site as it
=
> has
> > all gone very quiet on this issue.
> >=20
> > Will somebody out there please, please, come up with the solution to
this
> > real problem which will stop the progress of domestic and residential
> > sprinklers in new build.
> >=20
> > Are there none of you out there who can answer the questions I raised
> > yesterday?
> >=20
> >
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > Residential Sprinkler Forum
> > Archives: //www.freelists.org/archives/dd251
> > WebSite: www.dd251.org.uk
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> > unsubscribe from the website www.dd251.org.uk
> >=20
> >=20
> >=20
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> > contained in this e-mail. The information and material is intended for
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> he
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addresse=
> e
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=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> > Residential Sprinkler Forum
> > Archives: //www.freelists.org/archives/dd251
> > WebSite: www.dd251.org.uk
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or
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> >=20
> >=20
> Thank you Chris for a considered response.
> Still doesn't solve the problem, however. And I would still like to know
> how companies installing watermist systems are getting round the problem
of
> these joists. Please, tell us all what piping you are using so that we can
> also benefit from your expertise in this area - surely it's not a great
> secret is it? Is this not a forum to share information for the good of
thi=
> s
> new market? And as Brian Blessed said earlier, there is plenty to go
around
> and we should not be so "covetous" of such information.
>
>
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>
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