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8/3/2019 Rapid News 5
http://slidepdf.com/reader/full/rapid-news-5 1/4
© 2011 Sain t-Gob ain PAM UK Ltd
In 2006, Rapid News kept our customers briefed on theintroduction of the Rapid joint. Now, at the end of 2011, Rapid
News will foc us on the c hange s to some o f Saint-Gob ain PAM’ s
produc ts to me et the requ irem ents of BS EN 545:2010.
Rapid News will be targeted to the key contacts in your
orga nisa tion who need to know the p rog ress of the c onve rsion to
the new standard and can disseminate the information to their
colleagues.
Rap id News will be published onc e per month. Delivery will be
elect ronica lly with a link to a do wnload ab le .pd f on our web site.
Welcome (ba c k) to Rap id News
Rec eiving Rapid News
You have been identified as a key contact within your
organisation by your loc al Sa int-Gob ain PAM Reg iona l Sa les
Ma nag er, who se na me will ap pe ar in the c ontac ts sec tion at the
end of this newsletter.
If you wish to continue to receive notification of future issues of
Rapid News, you need do nothing – you will receive e-mails with
the new link as soo n a s future issues of Rapid News are pub lished .
However, if you do not want to receive any further notifications,you can let us know at any time by sending an e-mail to
dav id.smo ker@sa int-go ba in.c om and your name will be
removed from the ma iling list.
We encourage communication of the contents of Rapid News
amo ngst your co llea gue s. Please fee l free to fo rwa rd Rap id News
to others within your organisation. Alternatively, if you feel that a
colleague would benefit from receiving their own notification
d irec tly from Sa int-Gob ain PAM UK, plea se let us know the ir
name, position and e-mail address. It’s as simple as that!
Inside This Issue
1 Welcome (bac k) to
Rap id News
1 Receiving Rapid News
2 BS EN 545: 2010
2 Pressure Classes
2 Roll-out Prog ramm e for
the new Stand ard
3 ‘Prefe rred ’ Pressure
Classes
3 Pipe Ma rkings
3 Are Pressure Cla sses
Applied to Fittings?
3 The Imp ac t on Self-
Restra ined Joints
4 Your Loc al Conta c t
4 Next Issue
R a p id N ew s
ISSUE 5
Oc tobe r 2011
Rapid News will be
targeted to the key
c onta c ts in your
organisation.
8/3/2019 Rapid News 5
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© 2011 Sain t-Gob ain PAM UK Ltd
PAGE 2 RAPID NEWS – OCTOBER 2011
First p ub lished in 1995, BS EN 545 is well estab lished as the p roduc tspe c ifica tion for duc tile iron po tab le wa ter pipe line systems within the wa ter
industry. European standards are reviewed regularly to ensure that they
rema in in touc h with tec hnic al improvements and this stand ard ha s rec ently
been revised and published (31st October 2010) following a 3 year work
programme.
The ne w standard inc ludes the m ost rad ica l cha nge since the first
publication with the replacement of thickness (K) classes by the more
logical and practical pressure (C) classification. Although there were some
other amendments to the standard they were more to reflect the reality of
current supply from most manufacturers, e.g. the minimum coating
thickness wa s increased to 200 mg/ m2.
BS EN 545: 2010
Saint-Goba in PAM UK beg an p rep arat ions for the transition to the ne w
standard in 2010, to make sure that the transition from a customer’s point of
view will be as sea mless as possible.
As from now, we will start to deliver pipes marked to the new standard (see
below ) as stoc ks with the p revious ma rkings a re run dow n.
Som e c od es will cha nge and we will keep yo u informed of these through
Rapid News, your local contact (see back page) and updates to your
electronic schedules.
You c an still order on the existing c od es and we will ca rry out the substitution
throug h our SAP system.
Roll-out Programme for the new Standard
Pressure c lasses are a
more log ica l wa y of
expressing a pipe’s
p ressure ca pability – c an
anyo ne spo ntane ously
give the working pressure
of a DN 600 K9 pipe?
Previously, p ipe s and fittings were c lassified in K c lasses (e.g. K9), ca lcu lated
from an emp iric al formula b ased ma inly on m anufa c turing c onstraints at the
time of the first p ub lica tion in 1995. This resulted in p ipes with p ressure
capabilities far in excess of their intended usage especially at smaller
diameters. For example, a DN 150 flexibly jointed pipe of K9 minimum
thickness wa s ra ted a t 79 ba r working p ressure w hich, with a safe ty fac tor of
3, mea ns an ac tua l failure p ressure in the reg ion of 235 ba r – far in excess of
normal network operating pressures! Even in the larger diameters, say DN
1200, the ac tua l failure p ressure was in excess of 110 ba r.
With the advent of improved manufacturing techniques and substantial
investment in comp uter co ntrolled tec hnology, it is now po ssible to produc e
homogeneous ductile iron pipe consistently to more realistic thicknesses
ap propriate to their use.
The new standard EN 545:2010 ad op ts the language of users and c lassifies
pipes and fittings by pressure classes, i.e. according to their pressure
c ap ab ility. The old K c lasses will disappe ar as they w ill no long er confo rm
eithe r to EN 545:2010 or the ISO 2531:2009 sta ndard, a s used outside Europe.
Pressure Classes
F
mmin
D.S
.R20.ePFA
PFA = working pressure in bars
emin is the minimum pipe wallthickness, in mm
Rm is the minimum tensile strengthof ductile iron (= 420 MPa)
D is the mean pipe diameter, in mm
SF is a safety factor of 3
The maximum PFA of a pipe isequal to its class number, e.g. PFA40 bar for a class 40 pipe
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© 2011 Sain t-Gob ain PAM UK Ltd
PAGE 3RAPID NEWS – OCTOBER 2011
‘Preferred’ Pressure Cla sses
EN 545: 2010 de fines de fa ult p ressure c lasses by d iam eter. These
are referred to in the standard as ‘preferred pressure classes:
DN 40 to 300 – Cla ss 40 = 40 bar PFA (working pressure)
DN 350 to 600 – Class 30 = 30 bar PFA
DN 700 to 2000 – Class 25 = 25 bar PFA
These pressures still reta in a sa fety fa c to r of 3 (the highe st o f a ny
pipe material). Other pressure classes are available, with
provision to tailor-make a pressure class to suit a specific project
or ap plica tion, e.g. PAM Universal anc hored pipe s.
Pipe MarkingsPipes conforming to the new stand ard w ill be m arked with both
ISO 2531 and EN 545 (the two sta ndards are now we ll a ligned to
a llow c onfo rmity to b oth) and t he p ressure c lass. This is a c ha nge
to the previous ma rking where e ither EN 545 or ISO 2531 would
be marked and the rating was not marked, unless it was not
Class 40 (uti 400mm) or K9 (>450mm ). This cha ng e in marking
protocol will help you identify pipes conforming to the new
standard
Are Pressures Classes Applied to Fittings?
EN 545: 2010 doe s c lassify soc keted fitting s in p ressure c lasses but
the classes were selected to match the existing performance
under the o ld K class reg ime. Therefore, no c hang es to our
current offer are required in order to comply with the new
standard.
Note that the standard recognises that fittings with branches
may have a lower pressure rating than the ‘preferred’ pressure
c lass and this should b e spe c ified b y the manufac turer.
Note also that the working pressure of flanged fittings is
dete rmined by the p ressure rating of the flang e.
The Imp ac t on Self –Restrained Joints
The use o f anc hor gaskets (or any self–restrained joint) can
reduc e the PFA o f a pipe line a nd Saint-Gob ain PAM spe c ifies
the working pressure of all its self-restrained joints.
To ensure c ontinued pe rforma nce, we have mod ified the
anchor gaskets for DN 150, 200 and 250 from the first quarter of
2011, but a ll other self-restrained joints rema in the same .
Fittings are not marked
with the ir pressure c lass
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© 2011 Sain t-Gob ain PAM UK Ltd
PAGE 4 RAPID NEWS – OCTOBER 2011
Your Loc al Contac tSaint-Gob ain PAM UK Reg iona l Sales Ma na gers are your first
po int of c ontac t and are respo nsible for an a rea ba sed around
Water Comp any op erationa l areas:
Scottish Water
Ga ry Clark; 07801 346003; ga ry.clark@saint-goba in.com
Northumbrian, Yorkshire
Lorra ine Parrott ; 07860 480310; lorraine.parrott@saint-
gobain.com
United Utilities - North West Water
Peter Povey; 07711 097214; pete r.po vey@sa int-go ba in.c om
Ang lian, Ca mbridg e, Essex & Suffolk, Veolia
Paul Hanc oc k; 07850 810385; pa ul.hanc oc k@saint-go ba in.c om
Severn Trent, Dwr Cymru Welsh Water, South Staffordshire, Dee
Valley
Kevin Bourne; 07525 672211; kevin.bourne@saint-goba in.c om
Southern, Thames, Mid Kent, Portsmouth, South East, Sutto n &
East Surre y
[unt il 1st Janaury 2011: Lee Goodall; 07711 097221;
lee.goo da ll@sa int-go ba in.com ]
South West, Wessex, Bournemouth, Bristol, Jersey , Guernsey
Darren Wood; 07917 574184; darren.wo od @sa int-go bain.com
We w elc ome a ny feedb ac k you ma y have ab out Rap id News.
Please c onta c t David Smo ker either by e-ma il
(da vid.smo ker@sa int-go ba in.com ) or at our head officead dress shown a t left
For further information about any of our products and solutions
serving the utility industries, please visit our website: www.saint-
gobain-pam.co.uk
Saint-Gobain PAM UK Ltd
Lows Lane
Sta nton-by-Dale
Ilkeston
Derbyshire
DE7 4QU
Switc hb oard: 0115 930
5000
Ma in Fax: 0115 930 0702
Next Issue
In the next issue of Rapid News:
Susta inab ility b ene fits
The o ther cha ng es in EN 545
Joints
Corrosion Protection
Frequent ly Asked Que stions