SIST EN 1171:2003

SLOVENSKI STANDARD
01-julij-2003
Industrijski ventili - Litoželezni zasuni
Industrial valves - Cast iron gate valves
Industiearmaturen - Schieber aus Gusseisen
Robinetterie industrielle - Robinets-vannes en fonte
Ta slovenski standard je istoveten z: EN 1171:2002
ICS:
23.060.30 Zapirni ventili (zasuni) Gate valves
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 1171
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2002
ICS 23.060.30
English version
Industrial valves - Cast iron gate valves
Robinetterie industrielle - Robinets-vannes en fonte Industiearmaturen - Schieber aus Gusseisen
This European Standard was approved by CEN on 2 September 2002.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1171:2002 E
worldwide for CEN national Members.

Contents
page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions.5
4 Requirements .6
4.1 Design .6
4.2 Functional characteristics .11
4.3 Strength torque .12
5 Test procedures .13
6 Declaration of compliance .13
7 Designation.13
8 Marking, preparation for storage and transportation.14
8.1 Marking .14
8.2 Preparation for storage and transportation .14
Annex A (informative)  Information to be supplied by the customer.15
Annex B (normative)  Strength torque test.16
Annex C (normative)  Comparison between EN and ISO cast iron material grades .17
Annex ZA (informative)  Clauses of this European standard addressing essential requirements or
other provisions of EU Directives .18
Foreword
This document (EN 1171:2002) has been prepared by Technical Committee CEN/TC 69 "Industrial valves", the
secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by April 2003, and conflicting national standards shall be withdrawn at the latest by
April 2003.
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.
In this European Standard the annex A is informative and the annexes B and C are normative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
1 Scope
This European Standard specifies the requirements for cast iron gate valves with flanged ends, socket ends or
spigot ends.
This standard is applicable to cast iron gate valves mainly used for industrial and general-purpose applications.
However, they can be used for other applications provided the requirements of the relevant performance standards
are met.
The range of nominal sizes covered is:
DN 40 ; DN 50 ; DN 65 ; DN 80 ; DN 100 ; DN 125 ; DN 150 ; DN 200 ; DN 250 ; DN 300 ; DN 350 ; DN 400 ;
DN 450 ; DN 500 ; DN 600 ; DN 700 ; DN 800 ; DN 900 ; DN 1 000.
The range of pressure designations covered is:
isobaric PN 6; PN 10; PN 16; PN 25;
isomorphic, PS 10 bar to PS 1 bar at room temperature.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 19, Industrial valves – Marking of metallic valves.
EN 545:2002, Ductile iron pipes, fittings, accessories and their joints for water pipelines – Requirements and test
methods.
EN 558-1:1995, Industrial valves – Face-to-face and centre-to-face dimensions of metal valves for use in flanged
pipe systems – Part 1: PN-designated valves.
EN 736-1, Valves – Terminology – Part 1: Definition of types of valves.
EN 736-2, Valves – Terminology – Part 2: Definition of components of valves.
EN 736-3, Valves – Terminology – Part 3: Definition of terms.
EN 1092-2, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN designated –
Part 2: Cast iron flanges.
EN 1561:1997, Founding – Grey cast irons.
EN 1562:1997, Founding – Malleable cast irons.
EN 1563:1997, Founding – Spheroidal graphite cast irons.
prEN 12266-1 , Industrial valves – Testing of valves - Part 1: Pressure tests, test procedures and acceptance
criteria – Mandatory requirements.

To be published.
EN 12266-2, Industrial valves – Testing of valves – Part 2: Tests, test procedures and acceptance criteria -
Supplementary requirements.
EN 12351, Industrial valves – Protective caps for valves with flanged connections.
EN 12516-3, Valves – Shell design strength – Part 3: Experimental Method.
EN 12570, Industrial valves – Method for sizing the operating element.
EN ISO 5210, Industrial valves – Multi-turn valve actuator attachments (ISO 5210:1991).
ISO 185:1988, Grey cast iron - Classification.
ISO 1083:1987, Spheroidal graphite cast iron - Classification.
ISO 5922:1981, Malleable cast iron.
NOTE This European Standard supports some of the essential requirements of the Pressure Equipment
Directive 97/23/EC. The essential requirements covered are listed in annex ZA. It should be noted that this standard is not self-
sufficient and should be used with the normative references listed herein. Reference should also be made to annex ZA in the
relevant normative reference.
3 Terms and definitions
For the purposes of this European Standard, the definitions of types of valves and components and the definitions
of terms given in EN 736-1, EN 736-2 and EN 736-3 and the following terms and definitions apply.
NOTE The terms maximum allowable pressure, PS, and test pressure, PT, defined in EU Directive 97/23/EC (PED) are
equivalent to the terms allowable pressure, p , and test pressure, p , defined in EN 736-3.
s t
3.1
isomorphic series
series of cast iron gate valves of a specified type and design having maximum allowable pressures which tend to
decrease as the nominal size increases (see Table 2) and having specific flanged end connections (see 4.1.3.2.1)
3.2
isobaric series
series of cast iron gate valves of a specified type and design having the same maximum allowable pressure for all
nominal sizes
3.3
strength torque
torque applied directly to the operating mechanism or, when fitted, the operating device, which the valve is capable
of withstanding
4 Requirements
4.1 Design
4.1.1 Materials
4.1.1.1 The body and bonnet materials shall be selected from Table 1. The limits of use given in the material
standard shall be taken into account.
Table 1 — Body and bonnet materials
R
Designation
m
European
Graphite structure
N/mm
Standard
Short name Number
a
EN 1561:1997 200 EN-GJL-200 EN-JL1030
Grey cast iron
EN 1561:1997 250 EN-GJL-250 EN-JL1040
EN 1563:1997 350 EN-GJS-350-22-LT EN-JS1015
EN 1563:1997 350 EN-GJS-350-22-RT EN-JS1014
EN 1563:1997 400 EN-GJS-400-18-LT EN-JS1025
EN 1563:1997 400 EN-GJS-400-18-RT EN-JS1024
Spheroidal graphite cast
iron
EN 1563:1997 400 EN-GJS-400-15 EN-JS1030
EN 1563:1997 500 EN-GJS-500-7 EN-JS1050
EN 1563:1997 600 EN-GJS-600-3 EN-JS1060
EN 545:2002 420-5 EN-545-420-5 -
EN 1562:1997 300 EN-GJMB-300-6 EN-JM1110
Malleable cast iron
EN 1562:1997 350 EN-GJMB-350-10 EN-JM1130
a
Grade 200 shall not be used for valves with PN 25 flanged end connections.
4.1.1.2 All the internal parts in contact with the fluid shall be made of a material whose corrosion resistance to
the fluid being carried is at least equal to the body and bonnet material.
4.1.1.3 Trim materials shall have a chemical composition and mechanical properties, which ensure the
mechanical integrity of the valve and shall be stated in the manufacturer's technical documentation.
The trim comprises the following:
a) stem;
b) obturator seat;
c) body seat;
d) back seat (for valves DN 50 and above, when fitted).
4.1.1.4 Welding of grey cast iron and impregnation of castings of all materials is not permitted.
4.1.2 Pressure/temperature ratings
4.1.2.1 Isobaric series
The pressure/temperature ratings shall be in accordance with EN 1092-2 for the equivalent ISO material grade
except that valves with metallic seats shall not be used above 230 °C and valves with soft seats shall not be used
above 70 °C.
Annex C shall be used to determine the equivalent ISO material grade for the EN material grades specified in
Table 1.
4.1.2.2 Isomorphic series
The pressure/temperature ratings shall be as given in Table 2.
Table 2 — Pressure/temperature ratings for isomorphic series
Maximum allowable pressure PS (bar) at
DN
– 10 °C/120 °C 150 °C 180 °C 200 °C 230 °C
40 to 80
10,0 9,0 8,4 8,0 7,4
250 6,0 5,4 5,0 4,8 4,4
4,0 3,6 3,4 3,2 3,0
2,5 2,3 2,1 2,0 1,9
800 1,6 1,4 1,3 1,3 1,2
1,0 0,9 0,8 0,8 0,7
1 000
4.1.2.3 The use of isobaric valves at lower temperatures than shown in the pressure/temperature rating tables
in EN 1092-2 and of isomorphic valves at temperatures below those shown in Table 2 is permitted, providing that
the body and bonnet is manufactured from spheroidal graphite cast iron material grades EN-GJS-350-22-LT
or EN-GJS-400-18-LT. For temperatures below the lowest temperature shown in the rating tables the service
pressure shall be no greater than the pressure corresponding to the lowest temperature in the rating tables. The
lowest scheduled operating temperature shall be not less than the temperature specified in EN 1563 for the Charpy
impact tests.
4.1.3 Dimensions
4.1.3.1 Face-to-face and end-to-end dimensions
The face-to-face dimensions of flanged valves shall be in accordance with the basic series given in Table 3.
Table 3 — Basic series of face-to-face dimensions
Basic series (according to
Series DN
EN 558-1:1995)
Isomorphic 40 to 1 000 14
40 to 500 14
PN 6, PN 10, PN 16
40 to 1 000 3, 15, 29, 30
40 to 600 19, 4, 15, 26
PN 25
40 to 400 45
The end-to-end dimensions of valves with socket or spigot ends are given in the manufacturer's technical
documentation.
4.1.3.2 Body ends
4.1.3.2.1 General
The manufacturer's technical documentation shall indicate the type and dimensions of valve body ends, and
reference to the relevant European Standard.
4.1.3.2.2 Flange end connections
Flanges shall be in accordance with EN 1092-2.
Flanges can be an integral part of the valve body or adjustable flanges on a collar. Flanges, which are an integral
part of the body, may have supports, which permit a stable installation of the valve.
For isomorphic gate valves, the flange faci
...