SIST EN 1171:2015

Industrial valves - Cast iron gate valves

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.

Industriearmaturen - Schieber aus Gusseisen

Diese Europäische Norm legt die Anforderungen an Schieber aus Gusseisen mit Flanschenden, Muffenenden oder Spitzenden fest.
Diese Europäische Norm ist anwendbar auf Schieber aus Gusseisen, die vorwiegend für industrielle und allgemeine Anwendungen verwendet werden. Sie können jedoch auch für andere Anwendungen verwendet werden, unter der Voraussetzung, dass die Anforderungen der zugehörigen Gebrauchstauglichkeitsnormen erfüllt sind.
Der Nennweitenbereich ist wie folgt festgelegt:
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.
Der Bereich der Druckbezeichnungen ist wie folgt festgelegt:
-   isobar: PN 6; PN 10; PN 16; PN 25;
-   isomorph: PS 10 bar bis PS 1 bar, bei Raumtemperatur.

Robinetterie industrielle - Robinets-vannes en fonte

La présente Norme Européenne spécifie les prescriptions applicables aux robinets-vannes en fonte à extrémité à brides, à extrémités à emboîter femelle ou mâle.
La présente Norme Européenne s'applique aux robinets-vannes en fonte utilisés principalement pour des applications industrielles et d'usage général. Cependant ils peuvent être utilisés pour d'autres applications pourvu que les spécifications des normes appropriées de performances soient respectées.
La gamme de dimensions nominales couverte est :
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.
La gamme des désignations de pression couverte est :
-   isobares PN 6; PN 10; PN 16; PN 25;
-   isomorphes, PS 10 bar à PS 1 bar à la température ambiante.

Industrijski ventili - Litoželezni zasuni

Ta evropski standard določa zahteve za litoželezne zasune s prirobničnimi, vtičnimi ali spojnimi zaključki.
Ta standard velja za litoželezne zasune, ki se uporabljajo predvsem za industrijsko in splošno uporabo. Vendar se lahko uporabljajo za druge namene, če so izpolnjene zahteve ustreznih standardov zmogljivosti.
Razpon nazivnih velikosti je:
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.
Razpon zajetih oznak tlaka je:
– izobarne PN 6; PN 10; PN 16; PN 25;
– izomorfne, PS 10 bar do PS 1 bar pri sobni temperaturi.

General Information

• Status: Published
• Public Enquiry End Date: 02-Oct-2014
• Publication Date: 24-Sep-2015
• ICS: 23.060.30 - Gate valves
• Technical Committee: TLP - Pressure vessels
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 22-Sep-2015
• Due Date: 27-Nov-2015
• Completion Date: 25-Sep-2015
• Directive: 2014/68/EU - Directive 2014/68/EU of the European Parliament and of the Council of 15 May 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of pressure equipment
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Ref Project: EN 1171:2015 - Industrial valves - Cast iron gate valves

Relations

• Replaces: SIST EN 1171:2003 - Industrial valves - Cast iron gate valves
• Effective Date: 01-Nov-2015

Overview

EN 1171:2015 - Industrial valves - Cast iron gate valves is a European Standard published by CEN that specifies requirements for cast iron gate valves with flanged, socket or spigot ends. It applies primarily to industrial and general-purpose applications and covers nominal sizes DN 40 to DN 1000 and pressure designations including isobaric PN 6 / PN 10 / PN 16 / PN 25 and isomorphic series (PS 10 bar to PS 1 bar at room temperature). The standard also aligns with the Pressure Equipment Directive (97/23/EC / PED).

Key topics and technical requirements

• Scope & series types: Defines isobaric (same allowable pressure across sizes) and isomorphic (pressure decreases with size) valve series and applicable DN/PN ranges.
• Materials: Acceptable body and bonnet materials include grey, spheroidal (ductile) and malleable cast irons (EN-GJL, EN-GJS, EN-GJMB grades). Internal wetted parts must have corrosion resistance at least equal to body/bonnet.
• Pressure/temperature limits: Isobaric ratings follow equivalent ISO material grades; metallic seats limited to ≤230 °C, soft seats limited to ≤70 °C. Special low-temperature grades (EN‑GJS‑350‑22‑LT / EN‑GJS‑400‑18‑LT) are required for TS < −10 °C.
• Dimensions & connections: Face-to-face and end-to-end dimensions referenced to EN 558 series; flange connections per EN 1092‑2; socket/spigot ends to be compatible with adjacent piping. Body end port minimum inside diameters are specified per DN/PN.
• Operation & attachments: Operating direction (clockwise to close), maximum valve heights by DN, and actuator/gearbox attachment per EN ISO 5210.
• Functional performance:
  • Shell design strength validated per EN 12516‑4 (calculation) or EN 12516‑3 (experimental).
  • Flow characteristics (full or reduced bore) and seating design (metallic, hard-faced, or soft seats).
  • Seat tightness acceptance levels per EN 12266‑1 / EN 12266‑2 (Rate A for elastomeric seats; Rate B for others).
• Testing & documentation: Includes strength torque test (Annex B), rules for marking, storage/transport, and manufacturer/customer information (Annex A). Declaration of compliance and PED relationship detailed in Annex ZA.

Applications and users

• Typical users: valve manufacturers, product designers, procurement/specification engineers, test laboratories, plant operators and maintenance teams.
• Practical applications: process plants, water and utility systems, industrial piping networks and general-purpose installations where cast iron gate valves are suitable and where DN/PN fall within the standard’s ranges.

Related standards

Key referenced standards include:

• EN 558 (face-to-face dimensions)
• EN 1092‑2 (cast iron flanges)
• EN 12266‑1 / EN 12266‑2 (testing)
• EN 12516‑3 / EN 12516‑4 (shell strength)
• EN ISO 5210 (actuator attachments)
• EN 19 (marking)

For procurement or compliance, reference EN 1171:2015 alongside the listed normative standards and applicable national implementations.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Industrijski ventili - Litoželezni zasuniIndustriearmaturen - Schieber aus GusseisenRobinetterie industrielle - Robinets-vannes en fonteIndustrial valves - Cast iron gate valves23.060.30Zapirni ventili (zasuni)Gate valvesICS:Ta slovenski standard je istoveten z:EN 1171:2015SIST EN 1171:2015en,fr,de01-november-2015SIST EN 1171:2015SLOVENSKI
STANDARDSIST EN 1171:20031DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1171
September
t r s w ICS
t uä r x rä u r Supersedes EN
s s y sã t r r tEnglish Version
Industrial valves æ Cast iron gate valves Robinetterie industrielle æ Robinetsævannes en fonte
Industriearmaturen æ Schieber aus Gusseisen This European Standard was approved by CEN on
s August
t r s wä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s w CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s s y sã t r s w ESIST EN 1171:2015

Information to be supplied by the customer . 15 Annex B (normative)
Strength torque test. 16 Annex C (normative)
Equivalence between EN and ISO cast iron material grades . 17 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC . 18 Bibliography . 19
EN 12516–4:2014 EN-GJL-250 Spheroidal graphite cast iron EN 12516–4:2014 EN-GJS-350-22-LT
EN 12516–4:2014 EN-GJS-350–22-RT
EN 12516–4:2014 EN-GJS-400–18-LT
EN 12516–4:2014 EN-GJS-400–18-RT
EN 12516–4:2014 EN-GJS-400–15
EN 12516–4:2014 EN-GJS-500–7
EN 12516–4:2014 EN-GJS-600–3 Malleable cast iron EN 12516–4:2014 EN-GJMB-300–6
EN 12516–4:2014 EN-GJMB-350–10
4.1.1.2 The body and bonnet materials may also be spheroidal graphite cast iron in accordance with the requirements of EN 545:2010, 4.4. 4.1.1.3 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. 4.1.1.4 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). 4.1.1.5 Welding and impregnation of castings of all materials are not permitted. 4.1.2 Pressure/temperature ratings 4.1.2.1 Isobaric series The pressure/temperature ratings shall be in accordance with EN 1092-2:1997 for the equivalent ISO mate
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