SIST EN 331:2000/A1:2011
Manually operated ball valves and closed bottom taper plug valves for gas installations for buildings
Manually operated ball valves and closed bottom taper plug valves for gas installations for buildings
1.1 This European standard specifies the general requirements for the construction, performance and safety of ball valves and closed bottom taper plug valves. It also details the test methods and marking requirements. It applies to valves for domestic and commercial not directly buried installations inside or outside of buildings, using gases of the first, second and third family (specified in EN 437).
Handbetätigte Kugelhähne und Kegelhähne mit geschlossenem Boden für die Gas-Hausinstallation
Der zweite Absatz des Abschnitts 1.1 wird durch folgenden Text ersetzt:
Sie gilt für metallische Armaturen in häuslichen und gewerblichen, nicht direkt erdverlegten Anlagen innerhalb oder außerhalb von Gebäuden für Drücke von 0,2 ´ 105 Pa, 0,5 ´ 105 Pa und 5 ´ 105 Pa unter Anwendung von Gasen der ersten, zweiten und dritten Familie (diese sind in EN 437 festgelegt).
Robinets a tournant sphérique et robinets a tournant conique a fond plat destinés a etre manoeuvrés manuellement et a etre utilisés pour les installations de gaz dans les bâtiments
Remplacer le second paragraphe du 1.1 par ce qui suit :
« Elle s'applique aux robinets métalliques destinés aux installations domestiques et commerciales, qui ne sont
pas enterrées directement, qui sont situées a l'intérieur ou a l'extérieur des bâtiments, et qui sont alimentées
avec les gaz des premiere, deuxieme et troisieme familles (telles que spécifiées dans l'EN 437) et
fonctionnant sous des pressions allant jusqu?a 0,2 × 10 5 Pa, 0,5 × 10 5 Pa et 5 × 10 5 Pa ».
Ročne krogelne pipe in zasuni za hišne plinske napeljave - Dopolnilo A1
1.1 Ta evropski standard določa splošne zahteve za izdelavo, delovanje in varnost krogelnih pip in zasunov. Podrobno določa tudi preskusne metode in zahteve za označevanje. Velja za pipe in zasune za domače in gospodarske napeljave, ki niso neposredno zakopane, v stavbah ali zunaj njih, ki uporabljajo pline prve, druge ali tretje družine (določeno v EN 437).
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 331:2000/A1:2011
01-junij-2011
5RþQHNURJHOQHSLSHLQ]DVXQL]DKLãQHSOLQVNHQDSHOMDYH'RSROQLOR$
Manually operated ball valves and closed bottom taper plug valves for gas installations
for buildings
Handbetätigte Kugelhähne und Kegelhähne mit geschlossenem Boden für die Gas-
Hausinstallation
Robinets a tournant sphérique et robinets a tournant conique a fond plat destinés a etre
manoeuvrés manuellement et a etre utilisés pour les installations de gaz dans les
bâtiments
Ta slovenski standard je istoveten z: EN 331:1998/A1:2010
ICS:
23.060.20 Zapirni ventili (kroglasti in Ball and plug valves
pipe)
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
SIST EN 331:2000/A1:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 331:2000/A1:2011
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SIST EN 331:2000/A1:2011
EUROPEAN STANDARD
EN 331:1998/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2010
ICS 23.060.20
English Version
Manually operated ball valves and closed bottom taper plug
valves for gas installations for buildings
Robinets à tournant sphérique et robinets à tournant Handbetätigte Kugelhähne und Kegelhähne mit
conique à fond plat destinés à être manoeuvrés geschlossenem Boden für die Gas-Hausinstallation
manuellement et à être utilisés pour les installations de gaz
dans les bâtiments
This amendment A1 modifies the European Standard EN 331:1998; it was approved by CEN on 30 October 2010.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this
amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such
national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 331:1998/A1:2010: E
worldwide for CEN national Members.
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
Contents Page
Foreword .3
General .4
1 Modification to the Scope .5
2 Modifications to Clause 2, Normative references .5
3 Modifications to Clause 3, Definitions .6
4 Modifications to Clause 4, Classification .7
5 Modifications to Clause 5, Construction requirements .7
6 Modifications to Clause 6, Performance requirements . 10
7 Modifications to Clause 7, Test methods . 11
8 Modifications to Clause 8, Marking, installation and operating instructions and packaging . 14
8 Evaluation of conformity . 14
9 Addition of new Clause 9 . 21
9 Marking . 21
10 Addition of new Clause 10 . 21
10 Installation and operating instructions . 21
11 Deletion of annexes . 22
12 Addition of new Annex ZA . 22
2
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
Foreword
This document (EN 331:1998/A1:2010) has been prepared by Technical Committee CEN/TC 236 “Non
industrial manually operated shut-off valves for gas and particular combinations valves-other products”, the
secretariat of which is held by UNI.
This Amendment to the European Standard EN 331:1998 shall be given the status of a national standard,
either by publication of an identical text or by endorsement, at the latest by June 2011, and conflicting national
standards shall be withdrawn at the latest by June 2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
3
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
General
In the whole text of EN 331:1998 replace:
"closure member" with "obturator",
"union connection" with "joint",
"flexible connection" with "flexible appliance connector",
"flow restrictor" with "pressure limiting device".
Modify the clause numbering in relation to the modifications listed hereafter and correct the cross references
in text accordingly:
Old numbering New numbering Old numbering New numbering
5.1.1 5.1 5.1.3.1.1 5.3.1.1
5.1.1.1 5.1.1 5.1.3.1.2 5.3.1.2
5.1.1.2 5.1.2 5.1.3.1.3 5.3.1.3
5.1.1.3 5.1.3 5.1.3.2 5.3.2
5.1.1.4 5.1.4 5.1.3.3 5.3.3
5.1.1.5 9 5.1.3.4 5.3.4
5.1.1.6 5.1.5 5.1.3.5 5.3.5
5.1.1.7 5.1.6 5.1.3.6 5.3.6
5.1.1.8 5.1.8 5.1.4 5.4
5.1.2 5.2 5.2 5.5
5.1.2.1 5.2.1 5.2.1 5.5.1
5.1.2.2 5.2.2 5.2.2 5.5.2
5.1.2.3 5.2.3 5.3 5.6
5.1.2.4 5.2.4 5.4 5.7
5.1.2.5 5.2.5 6.6 6.7
5.1.2.6 5.2.6 6.6.1 6.7.1
5.1.2.6.1 5.2.6.1 6.6.2 6.7.2
5.1.2.6.2 5.2.6.2 6.7 6.8
5.1.2.7 5.2.7 7.6.4 7.6.3
5.1.3 5.3 7.6.5 7.6.4
5.1.3.1 5.3.1
4
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
Modifications to the text of EN 331:1998.
1 Modification to the Scope
Replace the second paragraph of 1.1 with the following:
"It applies to metallic valves for domestic and commercial not directly buried installations inside or outside of
buildings, using gases of the first, second and third family (specified in EN 437) and working up to
5 5 5
0,2 × 10 Pa, 0,5 × 10 Pa and 5 × 10 Pa."
NOTE "Not directly buried" within the context of this standard means that valves below ground are not in direct
contact with earth or other materials e.g. that they are in a protected encasement.
2 Modifications to Clause 2, Normative references
Replace the first paragraph with the following:
"The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies."
Add the references to the following standards in the appropriate order:
"EN 682, Elastomeric Seals — Materials requirements for seals used in pipes and fittings carrying gas and
hydrocarbon fluids
EN 751-1, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot
water — Part 1: Anaerobic jointing compounds
EN 751-2, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot
water — Part 2: Non-hardening jointing compounds
EN 751-3, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot
water — Part 3: Unsintered PTFE tapes
EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 1: Steel flanges
EN 1092-2, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 2: Cast iron flanges
EN 1092-3, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 3: Copper alloy flanges"
"EN 1503-1, Valves — Materials for bodies, bonnets and covers — Part 1: Steels specified in European
Standards
EN 1503-3, Valves — Materials for bodies, bonnets and covers — Part 3: Cast irons specified in European
Standards
EN 1503-4, Valves — Materials for bodies, bonnets and covers — Part 4: Copper alloys specified in European
Standards
EN 1555-3, Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 3: Fittings
EN 1593:1999, Non-destructive testing — Leak testing — Bubble emission techniques
5
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
EN 1775:2007, Gas supply — Gas pipework for buildings — Maximum operating pressure less than or equal
to 5 bar — Functional recommendations
EN 10226 (all parts), Pipe threads where pressure tight joints are made on the threads
EN 12627, Industrial valves — Butt welding ends for steel valves
EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using
data from reaction to fire tests
EN 60730-1:2000, Automatic electrical controls for household and similar use — Part 1: General requirements
(IEC 60730-1:1999, modified)
EN ISO 6708, Pipework components — Definition and selection of DN (nominal size) (ISO 6708:1995)
EN ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests (ISO 9227:2006)"
Delete the reference to ISO 228 and replace it with "EN ISO 228-1, Pipe threads where pressure-tight joints
are not made on the threads — Part 1: Dimensions, tolerances and designation (ISO 228-1:2000)".
Delete the references to ISO 7 and ISO 7005.
Delete the reference to prEN 1254 and replace it with the following:
"EN 1254-1, Copper and copper alloys — Plumbing fittings — Part 1: Fittings with ends for capillary soldering
or capillary brazing to copper tubes
EN 1254-2, Copper and copper alloys — Plumbing fittings — Part 2: Fittings with compression ends for use
with copper tubes"
3 Modifications to Clause 3, Definitions
Replace the term "3.3.1 closure member" with "3.3.1 obturator".
Replace term "3.3.4 compression joint" and the relevant definition with the following:
"3.3.4
mechanical joint
joint in which gas tightness is achieved by compression with or without a seal
NOTE This joint can be easily disassembled and reassembled."
Replace terms "3.3.6 union connection" and "3.3.7 flexible connection" and the relevant definitions with the
following:
"3.3.6
joint
means of connecting elements of a gas installation
[EN 1775:2007]
3.3.7
flexible appliance connector
element of flexible pipework to be fitted between the end of fixed pipework and the appliance inlet connection
6
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
[EN 1775:2007]"
Replace the definition of 3.5.3 as follows: "maximum pressure at which a valve can be operated continuously
under normal operating conditions".
Add the following term and definition:
"3.10
DN (nominal size)
see EN ISO 6708"
4 Modifications to Clause 4, Classification
Replace the title of "4.1 Pressure classes" with "4.1 Internal pressure classes".
Replace Table 1 in 4.1 with the following table:
"Table 1 — Valve pressure classes
Class Pressure range Remark
MOP 0,2 5 5
0 to 0,2 x 10 Pa MOP = 0,2 x 10 Pa
MOP 0,5 5 5
0 to 0,5 x 10 Pa MOP = 0,5 x 10 Pa
MOP 5 5 5
0 to 5 x 10 Pa MOP = 5 x 10 Pa
"
5 Modifications to Clause 5, Construction requirements
Delete the title "5.1 General" and renumber the subclauses in Clause 5 as indicated in the table in General on
page 4 of this Amendment 1.
Replace 5.1.1.1 with the following:
"5.1.1 Any part in contact with the gas or the surrounding atmosphere, shall be manufactured from
corrosion-resistant materials or shall comply with salt spray test (see 7.6.3), if relevant.
The corrosion protection for springs and other moving parts shall not be impaired by any movement."
Replace 5.1.1.3, 5.1.1.4, 5.1.1.5, 5.1.1.6, 5.1.1.7 and 5.1.1.8 with the following:
"5.1.3 Material indicated in 5.1.8, b) and c), excluding a), shall be tested in accordance with 7.6.3 (salt spray
resistance).
Once the test has been run, no corrosion which could impair the device's operation shall be revealed by visual
examination (disregarding possible salt deposits), and the external tightness of the device (connected and
disconnected) remains in conformity with the requirement defined in 6.2 (leak-tightness).
5.1.4 Springs and other moving parts manufactured from non-corrosion-resistant materials shall be
protected against corrosion and shall retain their protective coating despite any movement resulting from the
operation of the valve. After the test of 7.6 these parts shall withstand the test of 7.6.3.
7
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
5.1.5 Elastomeric materials shall comply with EN 549 or EN 682 as appropriate to the intended use.
5.1.6 Lubricants shall comply with EN 377.
5.1.7 Anaerobic jointing compounds shall comply with EN 751-1.
5.1.8 The shell, obturator and stem shall be made in one of the following materials:
1)
a) copper alloy excluding Aluminium-bronze ;
2)
b) ductile cast iron excluding laminar cast iron ;
3)
c) forged steel and cast steel ."
Modify the relevant footnotes as follows:
1)
" On this subject EN 1503-4 is available."
2)
" On this subject EN 1503-3 is available."
3)
" On this subject EN 1503-1 is available."
Replace 5.1.2.2 with the following:
"5.2.2 Product appearance
All valve components, when viewed with the naked eye corrected for normal vision, shall be free from sharp
edges and corners which could cause damage, injury or incorrect operation."
Replace 5.1.2.3 with the following:
"5.2.3 Valve maintenance
All valves shall be designed to be maintenance free for a reasonable economic working life."
Replace the title of "5.1.3 Connections" with "5.3 Joints" and renumber the subclauses in the former 5.1.3 as
indicated in the table in General on page 4 of this Amendment 1.
Replace 5.1.3.1.1 with the following:
"5.3.1.1 Threaded inlet and outlet connections for valves with pressure-tight joints made on the threads,
shall comply with EN 10226."
Replace 5.1.3.1.2 with the following:
"5.3.1.2 Pressure-tight joints shall comply with either EN 10226-1, ISO 261 or, EN ISO 228-1."
Change the title of "5.1.3.2 Flanges" to "5.3.2 Bolted flange joint".
In the first paragraph of the old 5.1.3.2 (new 5.3.2) replace "ISO 7005" with "EN 1092-1, EN 1092-2 and
EN 1092-3".
Replace 5.1.3.3 with the following:
8
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
"5.3.3 Capillary soldered or capillary brazed joints
The dimensions of connections for capillary soldered and capillary brazed joints shall comply with EN 1254-1."
Replace 5.1.3.5 with the following:
"5.3.5 Compression joints
The dimensions of the construction of the compression joints shall comply with EN 1254-2."
Replace the old 5.1.3.6 (new 5.3.6) with the following:
"Butt welded ends for steel valves shall comply with EN 12627."
Add the following new subclause:
"5.3.7 Valves with polyethylene joints
Polyethylene joints shall be in accordance with EN 1555-3."
Replace 5.1.4 with the following:
"5.4 Seals
Sealing on the obturator shall be constructed so that tightness is achieved by mechanical means. This shall
exclude the use for this purpose of all sealing materials such as liquids, pastes and tapes.
The tightness between the different parts of the body shall be assured by mechanical means. Additional
products, like glues, pastes, tapes, split pins, …. may be used in order to maintain the mechanical tightness. If
glues, pastes, tapes are used, they shall comply with EN 751-1, EN 751-2 and EN 751-3."
Replace 5.3 with the following:
"5.6 Stops
On valves the end positions "open" and "closed" shall be limited by fixed, non adjustable stops.
The manual actuator shall be designed so that it is:
at right angles to the direction of the flow for the closed position;
parallel with the direction of the flow for the open position.
Each part of the operating mechanism that can rotate shall be marked in an unambiguous way of
understanding whether it is in closed or open position. The valve shall be operated only by means of the
operating mechanism provided with the original valve by the manufacturer.
If any parts of the operating mechanism are dismounted, they shall be reassembled in the correct way
assuring the correct operation.
The valve may include a locking system which allows the valve to be blocked and sealed in the shut-off
position."
Replace 5.4 with the following:
9
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
"5.7 Resistance to high temperature (for internal networks)
The manually operated ball valves and closed bottom taper plug valves shall comply with the high
temperature resistance requirements of EN 1775:2007, Annex A, procedure B."
6 Modifications to Clause 6, Performance requirements
In 6.2 delete the second sentence in the first paragraph ("Valves which may be … closure parts").
Modify the beginning of the second paragraph of 6.2 as follows: "Leak-tightness for all the leak-tightness and
strength tests (bending and torque) shall be …"
Replace the title of "6.3 Rated flow rate" with "6.3 Effectiveness – Rated flow rate" and the title of
"6.4 Operating torque" with "6.4. Mechanical strength of the operating torque".
In 6.4 replace the second sentence in the first paragraph with the following: "The operating torque at low
temperature shall be measured and recorded for use in accordance with 6.7 and 7.8."
Replace Table 4 in 6.4 with the following:
"Table 4 — Operating torque
DN Torque (N · m)
at ambient temperature
max.
< 15 4
15 7
20
25
32 14
40
50
"
Replace the title of "6.5 Torque and bending resistance" with "6.5 Torque and bending mechanical
strength".
Add the following new sub-clause:
"6.6 Reaction to fire
Manually operated ball valves and closed bottom taper plug valves in compliance with this standard are
classified as belonging to Class A1 "No contribution to fire" when made of materials included in Commission
Decision 96/603/EC (OJEU L267 of 19.10.1996), as amended by EC Decision 2000/605/EC (OJEU L258 of
12.10.2000) and Decision 2003/424/EC (OJEU L144 of 12.6.2003).
Products which are subject to a coating containing more than 1,0 % by weight or volume (whichever is the
lower) of homogeneously distributed synthetic material shall be tested and classified according to
EN 13501-1."
10
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
In new 6.7.1 (which was former 6.6.1) replace the second sentence in the second paragraph with the
following: "It shall comply with the requirements for operating torque in accordance with 6.4."
Replace the text of 6.7 Stop resistance with the following:
"6.8 Safeguard against overloading of the handle – Stop resistance
When tested in accordance with 7.8, the stops in the open or closed position shall withstand minimum
1,5 times the maximum operating torque selected between ambient and low temperature torque, whichever is
the higher."
Add the following new sub-clause:
"6.9 Release of dangerous substances
Materials used in valves shall not release any dangerous substances in excess of the maximum permitted
levels specified in a relevant European Standard for the material or permitted in the national regulations of the
member state of destination."
7 Modifications to Clause 7, Test methods
Replace the last sentence of 7.1.1 with the following:
"When there are several declared mounting positions, the least favourable position shall be selected."
Replace the text of 7.1.2 with the following:
"Three samples of each size of valve shall be tested according to Table 7."
Replace Table 7 in 7.1.2 with the following:
11
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
"Table 7 — Test samples, testing and compliance criteria
a
Characteristic Requirement Assessment method Compliance criteria
No. of samples
[name of the [clause where [clause where the [clause where criteria
[number of samples to
characteristic] requirement is given] method is given] are given]
be assessed]
Reaction to fire 6.6
Deemed to satisfy
Class A1
Dimensional tolerances 5.3 EN 10226-1, ISO 261, EN 10226-1, ISO 261,
EN ISO 228-1, EN ISO 228-1,
EN 1092-1, EN 1092-2, EN 1092-1, EN 1092-2,
or EN 1092-3 or EN 1092-3
Internal pressure: 6.2 7.2 3 (samples n. 1, n. 2, 7.2
- leak-tightness and n. 3)
Tightness (gas): 6.2 7.2 3 (samples n. 1, n. 2, 7.2
- leak tightness and n. 3)
Effectiveness: 6.3 7.3 1 (sample n. 2) 7.3
- rated flow rate
Resistance to high 5.7 EN 1775:2007, 2 (supplementary EN 1775:2007,
b
temperature (for Annex A, procedure B Annex A, procedure B
samples 4 and 5 )
internal networks)
Mechanical strength 6.5 7.5 1 (sample n. 2) 7.5
(for gas networks):
- torque and bending
resistance
Mechanical strength 6.4 7.4 3 (samples n. 1, n. 2, 7.4
(for gas networks): and n. 3)
- operating torque
Safeguard against 6.8 7.8 1 (sample n. 1) 7.8
overloading of handle
(for gas networks): stop
resistance
Durability: 6.7.1 7.6.1 1 (sample n. 3) 7.6.1
- endurance
Durability: 6.7.2 7.6.2 1 (sample n. 3) 7.6.2
- resistance to low
temperature
Durability: 5.1.1 and 5.1.3 7.6.3 1 (sample n. 3) 7.6.3
- salt spray resistance
Durability: 5.1 7.6.4 1 (sample n. 3) 7.6.4
- resistance to humidity
Angular seal 5.2.7 7.7 1 (sample n. 1) 7.7
a
This column indicates both the total amount of samples to be assessed for each test and which of the three samples of each size of
valve shall be used for each test (i.e. sample n. 1, n. 2, and/or n. 3, or samples n. 4, n. 5).
b
Where applicable, high temperature resistance test shall be performed on supplementary samples n. 4 (internal leak) and n. 5
(external leak).
"
Replace the title of "7.2 Leak-tightness" with "7.2 Internal pressure and leak-tightness".
12
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
Replace the whole text of 7.2.1 with the following:
"The test shall be carried out in accordance with EN 1593:1999, applying the immersion technique with direct
pressurization of the object (see 8.1, 8.2.1 and 8.3 of EN 1593:1999) and making measurements according to
Annex A of EN 1593:1999.
3 3
The uncertainty of measurement shall not be greater then 5 cm /h and the resolution shall be 1 cm .
3
A valve is leak-tight when the measured leakage rate does not exceed 20 cm /h. It includes the equipment
accuracy, measurement errors and apparent leakages mainly due to temperature variations.
The test shall be carried out over a period of 10 min with the test pressure of:
600 Pa for all classes and
5
0,3 x 10 Pa for class MOP 0,2 or
5
0,75 x 10 Pa for class MOP 0,5 or
5
7,5 x 10 Pa for class MOP 5 or
5
20 x 10 Pa for class MOP 5 (20), where applicable."
Replace the title of "7.3 Rated flow rate" with "7.3 Effectiveness – Rated flow rate".
Replace the first sentence of 7.3.1 with the following:
"Using the apparatus, as shown in Figure 2, the test is carried out on the valve, which shall include any of its
integral means of insulation and safety devices."
Replace the title of "7.4 Operating torque" with "7.4 Mechanical strength of the operating torque" and the
title of "7.5 Torque and bending resistance" with "7.5 Torque and bending mechanical strength ".
In the first and second indents [a) and b)] of 7.5.2.1.1 replace "Screw" with "Assemble"; besides, in the first
indent replace "equal to or greater than 2 DN" with "≥ 2 DN" and in the second indent replace the last
sentence with "Ensure that the joints are leak-tight".
Replace the third indent (c) of 7.5.2.2.1 with the following:
"c) With the stress removed, measure the external and internal leak-tightness according to 6.2 and check the
operating torque according to 6.4 and visually for any deformation."
In the second indent (b) of 7.5.3 replace "and material for this type of fitting" with "and of appropriate material
for this type of fitting".
Replace the whole text of 7.6.2 with the following:
"Prior to the endurance test in 7.6.1, the sample is maintained at a temperature of either –5 °C, –20 °C
or -40 °C (depending on class) for 23 h.
The sample is then subjected to a test pressure as specified in 7.2.1.
The operating torque is measured immediately after removal from the low temperature chamber in
accordance with 7.4."
Delete 7.6.3.
13
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
Replace 7.6.4 with the following and delete Figure 6:
"7.6.3 Salt spray resistance
This test shall be carried out on device N° 3; following the requirements of EN ISO 9227, for a neutral salt
spray (NSS).
The device shall not be under pressure and shall be disconnected.
If it was designed by the manufacturer, the protection shall be positioned at the outlet of the device.
The inlet of the device shall be closed by a cap.
The test chamber shall spray a saline solution having a mass concentration of (5 ± 0,5) % sodium chloride in
distilled water.
2
The intensity of the spray shall be such that, for each 80 cm of horizontal collecting surface, (2 ± 1) ml of
solution are collected per hour.
The test chamber shall be maintained at a temperature of (35 ± 1) °C.
The test lasts (96 ± 1) h."
Replace the text of 7.8 with the following:
"7.8 Safeguard against overloading of the handle – Stop resistance
The operating torque at the low temperature shall be measured at the minimum operating temperature
(see 6.4).
Apply the operating torque selected between ambient temperature and low temperature torque, whichever is
the higher, in accordance with 6.7, to the actuator. Check the valve, after the torque is removed, visually for
any deformation, cracking or failure of the mechanism."
8 Modifications to Clause 8, Marking, installation and operating instructions and
packaging
Replace Clause 8 with the following:
"
8 Evaluation of conformity
8.1 General
The compliance of manually operated ball valves and closed bottom taper plug valves with the requirements
of this European Standard and with the stated values shall be demonstrated by:
initial type testing,
factory production control by the manufacturer including product assessment.
NOTE The assignment of tasks to the notified body(ies) and the manufacturer is shown in Table ZA.3.
14
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SIST EN 331:2000/A1:2011
EN 331:1998/A1:2010 (E)
The manufacturer shall always retain the overall control and shall have the necessary means to take
responsibility for the product.
8.2 Initial type testing
8.2.1 General
Initial type testing shall be performed to demonstrate compliance with this European Standard.
All essential characteristics for which the manufacturer declares performances, are subject to Initial Type
Testing. In addition, the need to perform Type Tests applies to all other characteristics included in a standard
when the man
...
SLOVENSKI SIST EN 331:2000/oprA1:2005
PREDSTANDARD
julij 2005
Ročne krogelne pipe in zasuni za hišne plinske napeljave - Dopolnilo A1
Manually operated ball valves and closed bottom taper plug valves for gas
installations for buildings – Amendment A1
ICS 23.060.20 Referenčna številka
SIST EN 331:2000/oprA1:2005(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
DRAFT
EN 331:1998
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
March 2005
ICS
English version
Manually operated ball valves and closed bottom taper plug
valves for gas installations for buildings
Robinets à tournant sphérique et robinets à tournant Handbetätigte Kugelhähne und Kegelhähne mit
conique à fond plat destinés à être manoeuvrés geschlossenem Boden für die Gas-Hausinstallation
manuellement et à être utilisés pour les installations de gaz
dans les bâtiments
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 236.
This draft amendment A1, if approved, will modify the European Standard EN 331:1998. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.
This draft amendment was established by CEN in three official versions (English, French, German). A version in any other language made
by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status
as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 331:1998/prA1:2005: E
worldwide for CEN national Members.
---------------------- Page: 2 ----------------------
EN 331:1998/prA1:2005 (E)
Contents Page
Foreword.3
General.4
1 Scope .5
2 Normative references .5
3 Definitions .6
4 Classification.6
5 Construction requirements.7
6 Performance requirements .9
7 Test methods.10
8 Marking, installation and operating instructions and packaging .12
Annex ZA (informative) Clauses of this European Standard addressing the provisions of the EU
Construction Products Directive.17
2
---------------------- Page: 3 ----------------------
EN 331:1998/prA1:2005 (E)
Foreword
This document (EN 331:1998/prA1:2005) has been prepared by Technical Committee CEN/TC 236 “Non
industrial manually operated shut-off valves for gas and particular combinations valves-other products”, the
secretariat of which is held by UNI.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
3
---------------------- Page: 4 ----------------------
EN 331:1998/prA1:2005 (E)
General
In the whole text of EN 331:1998 replace:
"closure member" with "obturator",
"union connection" with "joint",
"flexible connection" with "flexible appliance connector",
"flow restrictor" with "pressure limiting device".
Modify the clause numbering in relation to the modifications listed hereafter and correct the cross references
in text accordingly:
Old numbering New numbering Old numbering New numbering
5.1.1 5.1 5.1.3.1.1 5.3.1.1
5.1.1.1 5.1.1 5.1.3.1.2 5.3.1.2
5.1.1.2 5.1.2 5.1.3.1.3 5.3.1.3
5.1.1.3 5.1.3 5.1.3.2 5.3.2
5.1.1.4 5.1.4 5.1.3.3 5.3.3
5.1.1.5 5.1.5 5.1.3.4 5.3.4
5.1.1.6 5.1.6 5.1.3.5 5.3.5
5.1.1.7 5.1.7 5.1.3.6 5.3.6
5.1.1.8 5.1.9 5.1.3.7 5.3.7
5.1.2 5.2 5.1.4 5.4
5.1.2.1 5.2.1 5.2 5.5
5.1.2.2 5.2.2 5.2.1 5.5.1
5.1.2.3 5.2.3 5.2.2 5.5.2
5.1.2.4 5.2.4 5.3 5.6
5.1.2.5 5.2.5 5.4 5.7
5.1.2.6 5.2.6 6.6 6.7
5.1.2.6.1 5.2.6.1 6.6.1 6.7.1
5.1.2.6.2. 5.2.6.2 6.6.2 6.7.2
5.1.2.7 5.2.7 6.7 6.8
5.1.3 5.3 7.6.4 7.6.3
5.1.3.1 5.3.1 7.6.5 7.6.4
Modifications to the text of EN 331:1998.
4
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EN 331:1998/prA1:2005 (E)
1 Scope
Replace the second paragraph of clause 1.1 with the following:
"It applies to metallic valves for domestic and commercial not directly buried installations inside or outside of
buildings, using gases of the first, second and third family (specified in EN 437) and working up to
5 5 5
0,2 × 10 Pa, 0,5 × 10 Pa and 5 × 10 Pa."
2 Normative references
Add the references to the following standards in the appropriate order:
"EN 682, Elastomeric Seals - Materials requirements for seals used in pipes and fittings carrying gas and
hydrocarbon fluids.
EN 751-1, Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot
water - Part 1: Anaerobic jointing compounds.
EN 1092-1, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 1: Steel flanges.
EN 1092-2, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 2: Cast iron flanges.
EN 1092-3, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 3: Copper alloy flanges."
"EN 1503-1, Valves - Materials for bodies, bonnets and covers - Part 1: Steels specified in European
Standards.
EN 1593:1999, Non-destructive testing - Leak testing - Bubble emission techniques.
EN 1775, Gas supply - Gas pipework for buildings - Maximum operating pressure < 5 bar - Functional
recommendations.
EN 12627, Industrial valves - Butt welding ends for steel valves .
EN 60730-1, Automatic electrical controls for household and similar use - Part 1: General requirements.
EN ISO 6708, Pipework components - Definition and selection of DN (nominal size)."
"ISO 9227:1991, Corrosion test in artificial atmospheres – Salt spray tests."
Delete the reference to ISO 228 and replace it with "EN ISO 228-1, Pipe threads where pressure-tight joints
are not made on the threads - Part 1: Dimensions, tolerances and designation (ISO 228-1:2000)".
Delete the references to ISO 261 and ISO 7005.
Replace "prEN 1254" with "EN 1254".
5
---------------------- Page: 6 ----------------------
EN 331:1998/prA1:2005 (E)
3 Definitions
Replace the term "3.3.1 closure member" with "3.3.1 obturator".
Replace term "3.3.4 compression joint" and the relevant definition with the following:
"3.3.4
mechanical joint
joint in which gas tightness is achieved by compression with or without a seal
NOTE This joint can be easily disassembled and reassembled."
Replace terms "3.3.6 union connection" and "3.3.7 flexible connection" and the relevant definitions with the
following:
"3.3.6
joint
means of joining elements of a gas installation
3.3.7
flexible appliance connector
fitting of flexible pipework to be fitted between the end of fixed pipework and the appliance inlet connection"
Modify the definition of 3.5.3 as follows: "maximum pressure at which a valve can be operated continuously
under normal operating conditions".
Add the following term and definition:
"3.10
DN (nominal size)
see EN ISO 6708"
4 Classification
Replace Table 1 in 4.1 with the following table:
Table 1 — Valve pressure classes
Class Pressure range Remark
MOP 0,2 5 5
0 to 0,2 x 10 Pa MOP = 0,2 x 10 Pa
MOP 0,5 5 5
0 to 0,5 x 10 Pa MOP = 0,5 x 10 Pa
MOP 5 5 5
0 to 5 x 10 Pa MOP = 5 x 10 Pa
NOTE In some countries, national regulations require a special pressure (20 bar) for
valves used with third family gas. For those valves, "20" will be added to the class reference
(for example MOP 5-20).
6
---------------------- Page: 7 ----------------------
EN 331:1998/prA1:2005 (E)
5 Construction requirements
Delete the title "5.1 General" and renumber the subclauses in 5 as indicated in the table in General on page 4
of this Amendment 1.
Replace 5.1.1.1 with what follows:
"5.1.1 Any part in contact with the gas or the surrounding atmosphere, shall be manufactured from
corrosion-resistant materials or shall be suitably protected against corrosion.
The corrosion protection for springs and other moving parts shall not be impaired by any movement."
Replace 5.1.1.3, 5.1.1.4, 5.1.1.5 and 5.1.1.6 with what follows:
"5.1.3 Material indicated in 5.1.9, b) and c), excluding a), shall be tested in accordance with 7.6.3 (salt spray
resistance).
Once the test has been run, no corrosion shall be revealed by visual examination that could impair the
device's operation (disregarding possible salt deposits), and the external tightness of the device (connected
and disconnected) remains in conformity with the requirement defined in 6.2 (leak-tightness).
5.1.4 Springs and other moving parts manufactured from non-corrosion-resistant materials shall be suitably
protected against corrosion and shall retain their protective coating despite any movement resulting from the
operation of the valve. After the test of 7.6 these parts shall withstand the test of 7.6.3.
5.1.5 All markings shall be clearly legible, durable and resistant to atmospheric conditions. Labels and their
markings shall neither deteriorate nor lift nor become unreadable by humidity and temperature. Self-adhesive
labels shall be tested according to Annex A of EN 60730-1.
5.1.6 Rubber materials shall conform to EN 549 or EN 682.
Until a specific European standard becomes available, other non-metallic materials for seals (e.g. synthetic
fibers, graphite) shall conform to the requirements of those countries in which the valve will be used."
Add the following new subclause:
"5.1.8 Anaerobic jointing compounds shall conform to EN 751-1."
Replace 5.1.1.8 with what follows:
"5.1.9 The shell, obturator and stem shall be made in one of the following materials:
1)
a) copper alloy excluding Aluminium-bronze
2)
b) ductile cast iron excluding laminar cast iron
3)
c) forged steel and cast steel ."
3) 3)
Modify footnote as follows: " On this subject EN 1503-1 is available."
Replace 5.1.2.2 with what follows:
7
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EN 331:1998/prA1:2005 (E)
"5.2.2 Product appearance
All valve components, when viewed with the naked eye, shall be free from sharp edges and corners which
could cause damage, injury or incorrect operation."
Replace 5.1.2.3 with what follows:
"5.2.3 Valve maintenance
All valves have to be designed to be maintenance free."
Replace the title of "5.1.3 Connections" with "5.3 Joints" and renumber the subclauses in the former 5.1.3
as indicated in the table in General on page 4 of this Amendment 1.
Replace 5.1.3.1.2 with what follows:
"5.3.1.2 Where pressure-tight joints are not made on the threads according to ISO 7, they shall comply
with EN ISO 228-1."
Change the title of "5.1.3.2 Flanges" to "5.3.2 Bolted flange joint".
In the first paragraph of the old 5.1.3.2 (new 5.3.2) replace "ISO 7005" with "EN 1092-1, EN 1092-2 and
prEN 1092-3".
Both in the title and in the text of the old 5.1.3.3 (new 5.3.3) replace "capillary joints" with "capillary brazed
joints".
At the beginning of the old 5.1.3.6 (new 5.3.6) add:
"Butt welding ends shall comply with EN 12627, for steel valves. For other materials, while …"
4)
Add the following new subclause and the relevant footnote :
"5.3.7 Valves with polyethylene joints
4)
Polyethylene joints shall be in accordance with the relevant European Standard ."
Replace 5.1.4 with what follows:
"5.4 Seals
Sealing on the obturator shall be constructed so that tightness is achieved by mechanical means. This
excludes the use for this purpose of all sealing materials such as liquids, pastes and tapes.
The tightness between the different parts of the body will be assured by mechanically means. Additional
products, like glues, pastes, tapes, split pins, …. may be used in order to preserve the mechanical tightness."
Replace 5.3 with what follows:
4)
At the moment the matter is being treated in EN 1775:1998/A1:2000.
8
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EN 331:1998/prA1:2005 (E)
"5.6 Stops
On valves the end positions "open" and "closed" shall be limited by fixed, non adjustable stops.
The manual actuator shall be designed so that it is:
at right angles to the direction of the flow for the closed position;
parallel with the direction of the flow for the open position.
If the stop mechanism is part of the handle, the handle and the shaft shall either be all of one piece or in case
they are of two pieces the fastening of the handle shall be:
permanently attached (i.e. a method such as will ensure that this device may not be detached without
destruction or alteration)
or
sealed (i.e. an arrangement whereby any change causes visual modification of the sealing methods and
as a result makes tampering obvious)."
Replace 5.4 with what follows:
"5.7 High temperature resistance
If the national regulation demands a high temperature resistance test, the valve shall comply with the high
temperature resistance requirements of EN 1775 and be marked as such."
6 Performance requirements
In 6.2 delete the second sentence in the first paragraph ("Valves which may be … closure parts").
Modify the beginning of the second paragraph of 6.2 as follows: "Leak-tightness for all the leak-tightness and
strength tests (bending and torque) shall be …"
In 6.4 replace the second sentence in the first paragraph with what follows: "The operating torque at low
temperature shall be measured by the manufacturer and recorded for use in accordance with 6.7 and 7.8."
Replace Table 4 in 6.4 with the following table:
Table 4 — Operating torque
DN Torque (N · m)
at ambient temperature
max.
< 15 4
15 7
20
25
32 14
40
50
9
---------------------- Page: 10 ----------------------
EN 331:1998/prA1:2005 (E)
Add the following new sub-clause:
"6.6 Reaction to fire
Manually operated ball valves and closed bottom taper plug valves in compliance with this standard are
classified without further testing as belonging to Class A.1 ‘No contribution to fire’ as provided for in
Commission Decision 96/603/EC and its Amendment 2000/605/EC."
In new clause 6.7.1 (which was former 6.6.1) replace the second sentence in the second paragraph with what
follows: "It shall conform to the requirements for operating torque in accordance with 6.4."
Replace the text of 6.7 Stop resistance with what follows:
"6.8 Stop resistance
When tested in accordance with 7.8, the stops in the open or closed position shall withstand minimum 1,5
times the maximum operating torque selected between ambient and low temperature torque, whichever is the
higher."
Add the following new sub-clause:
"6.9 Dangerous substances
The manufacturer shall ensure that materials used for control levers and painting materials for all external
coatings do not contain any chemical substances the use of which is not allowed in construction products."
7 Test methods
Replace the text of 7.1.2 with what follows:
"Three (or five) samples of each size of valve are required for test to be carried out according to table 7."
Replace Table 7 in 7.1.2 with the following table:
Table 7 — Test sequence
Valve N° Clause 1 2 3
reference
Test
Ease of operation - X X X
Stop test 7.8 X
Angular seal 7.7 X
Leak-tightness 7.2 X X X
Rated flow rate 7.3 X
Torque resistance 7.5 X
Bending resistance 7.5 X
Endurance 7.6.1 X
Resistance to low temperature 7.6.2 X
Resistance to humidity 7.6.4 X
Salt spray resistance 7.6.3 X
NOTE Where applicable, high temperature resistance test shall be performed on
supplementary samples 4 (internal leak) and 5 (external leak).
10
---------------------- Page: 11 ----------------------
EN 331:1998/prA1:2005 (E)
Replace the fourth and fifth paragraphs of 7.2.1 with what follows:
"In case of dispute, a reference method shall be used, for example EN 1593:1999.
The test shall be carried out over a period of 10 min with the test pressure of:
600 Pa for all classes and
5
0,3 x 10 Pa for class MOP 0,2 or
5
0,75 x 10 Pa for class MOP 0,5 or
5
7,5 x 10 Pa for class MOP 5 or
5
20 x 10 Pa for class MOP 5 (20), where applicable."
Delete the sixth paragraph of 7.2.1 ("Where applicable, … with 7.2.2 and 7.2.3").
Replace the first sentence of 7.3.1 with what follows:
"Using the apparatus, as shown in figure 2, the test is carried out on the valve, which shall include any of its
integral means of insulation and safety devices."
In the first and second indents [a) and b)] of 7.5.2.1.1replace "Screw" with "Assemble"; besides, in the first
indent replace "equal to or greater than 2 DN" with "≥ 2 DN" and in the second indent replace the last
sentence with "Ensure that the joints are leak-tight".
In 7.5.2
...
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