EN 1171:2015

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
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CEN-CENELEC Management Centre:
Avenue Marnix 17,
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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 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. To determine the equivalent ISO material grades for the EN material grades specified in Table 1, refer to Annex C. 4.1.2.2 Isomorphic series The pressure/temperature ratings shall be as given in Table 2. SIST EN 1171:2015

250 6,0 5,4 5,0 4,8 4,4 300
350 4,0 3,6 3,4 3,2 3,0 400 450 500 600 2,5 2,3 2,1 2,0 1,9 700 800 1,6 1,4 1,3 1,3 1,2 900 1,0 0,9 0,8 0,8 0,7 1 000
4.1.2.3 For TS < - 10 °C, the body and bonnet material grades shall be EN-GJS-350-22-LT or EN-GJS-400-18-LT. In this case, the TS minimum shall be not less than the temperature specified in EN 12516-4:2014, Table 7. 4.1.3 Dimensions 4.1.3.1 Face-to-face and end-to-end dimensions The face-to-face dimensions of flan
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