SIST EN ISO 14723:2004

SLOVENSKI STANDARD
01-maj-2004
Petroleum and natural gas industries - Pipeline transportation systems - Subsea
pipeline valves (ISO 14723:2001)
Petroleum and natural gas industries - Pipeline transportation systems - Subsea pipeline
valves (ISO 14723:2001)
Erdöl- und Erdgasindustrie - Rohrleitungs-Transportsysteme - Unterwasser-
Rohrleitungssysteme (ISO 14723:2001)
Industries du pétrole et du gaz naturel - Systemes de transport par conduites - Vannes
de conduites immergées (ISO 14723:2001)
Ta slovenski standard je istoveten z: EN ISO 14723:2001
ICS:
23.060.01 Ventili na splošno Valves in general
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 14723
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2001
ICS 75.200
English version
Petroleum and natural gas industries - Pipeline transportation
systems - Subsea pipeline valves (ISO 14723:2001)
Industries du pétrole et du gaz naturel - Systèmes de Erdöl- und Erdgasindustrie - Rohrleitungs-
transport par conduites - Vannes de conduites immergées Transportsysteme - Unterwasser-Rohrleitungssysteme
(ISO 14723:2001) (ISO 14723:2001)
This European Standard was approved by CEN on 1 December 2001.
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, 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
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14723:2001 E
worldwide for CEN national Members.

CORRECTED  2002-09-25
Foreword
This document (EN ISO 14723:2001) has been prepared by Technical Committee ISO/TC 67
"Materials, equipment and offshore structures for petroleum and natural gas industries" in
collaboration with Technical Committee CEN/TC 12 "Materials, equipment and offshore
structures for petroleum and natural gas industries", 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 June 2002, and conflicting national
standards shall be withdrawn at the latest by June 2002.
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, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.
Endorsement notice
The text of ISO 14723:2001 has been approved by CEN as EN ISO 14723:2001 without any
modifications.
INTERNATIONAL ISO
STANDARD 14723
First edition
2001-12-01
Petroleum and natural gas industries —
Pipeline transportation systems — Subsea
pipeline valves
Industries du pétrole et du gaz naturel — Systèmes de transport par
conduites — Vannes de conduites immergées

Reference number
ISO 14723:2001(E)
©
ISO 2001
ISO 14723:2001(E)
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ii © ISO 2001 – All rights reserved

ISO 14723:2001(E)
Contents Page
Foreword.v
Introduction.vi
1 Scope .1
2 Normative references.1
3 Terms and definitions .3
4 Symbols and abbreviated terms .7
4.1 Symbols.7
4.2 Abbreviated terms .7
5 Valve types and configurations .8
5.1 Valve types .8
5.2 Valve configuration .9
6 Design.19
6.1 Design codes and calculations .19
6.2 Pressure and temperature ratings .20
6.3 Cavity relief .20
6.4 External pressure and loads .20
6.5 Sizes.20
6.6 Face-to-face and end-to-end dimensions .21
6.7 Minimum bore full-opening valves .30
6.8 Valve operation .30
6.9 Pigging.30
6.10 Valve ends .31
6.11 Bypass, drain and vent connections.31
6.12 Handwheels and wrenches.31
6.13 Locking devices.32
6.14 Position indicators .32
6.15 ROV interface .32
6.16 Sealant injection .32
6.17 Lifting lugs .32
6.18 Actuators/gearbox .32
6.19 Drive trains .33
6.20 Stem shaft protector.34
6.21 Hydraulic lock .34
6.22 Corrosion/erosion.34
6.23 Hyperbaric performance .34
iii © ISO 2001 – All rights reserved

ISO 14723:2001(E)
6.24 Design document review .34
7 Material .34
7.1 Material specification .34
7.2 Service compatibility.35
7.3 Forged parts .35
7.4 Composition limits.35
7.5 Toughness test requirements .36
7.6 Bolting.37
7.7 Sour service .37
8 Welding .38
8.1 Qualifications .38
8.2 Impact testing.38
8.3 Hardness testing.38
9 Quality control.40
9.1 General.40
9.2 Measuring and test equipment.40
9.3 Qualification of inspection and test personnel .40
9.4 NDE .40
9.5 NDE of repair welding .41
10 Testing .
...