[dd251] Re: Flexible Pipe
- From: Jeannette Baxter <j.baxter@xxxxxxxxxxxxxxxxxxxxx>
- To: <dd251@xxxxxxxxxxxxx>
- Date: Tue, 28 Jan 2003 21:28:05 +0100
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=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=3D=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
> To unsubscribe from the list, send an email to
> dd251-request@xxxxxxxxxxxx with "unsubscribe" in the Subject line or
> unsubscribe from the website www.dd251.org.uk
>=20
>=20
>=20
> Privileged and confidential information and/or copyright material may be
> contained in this e-mail. The information and material is intended for t=
he
> use of the intended addressee only. If you are not the intended addresse=
e
> you may not copy or deliver it to anyone else or use it in any unauthoris=
ed
> manner. To do so is prohibited and may be unlawful. If you receive this
> e-mail by mistake, please advise the sender immediately by return e-mail =
and
> destroy all copies. Thank you.
>=20
>=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=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=3D=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
> To unsubscribe from the list, send an email to
> dd251-request@xxxxxxxxxxxx with =93unsubscribe=94 in the Subject line or
> unsubscribe from the website www.dd251.org.uk
>=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.
=====================================================================
Residential Sprinkler Forum
Archives: //www.freelists.org/archives/dd251
WebSite: www.dd251.org.uk
To unsubscribe from the list, send an email to
dd251-request@xxxxxxxxxxxx with ?unsubscribe? in the Subject line or
unsubscribe from the website www.dd251.org.uk
Other related posts:
