SIST EN ISO 10434:2020

SLOVENSKI STANDARD
oSIST prEN ISO 10434:2020
01-februar-2020
Jekleni zasuni s prirobničnim zgornjim delom za naftno industrijo, petrokemijo in
podobno industrijo (ISO/DIS 10434:2019)
Bolted bonnet steel gate valves for the petroleum, petrochemical and allied industries
(ISO/DIS 10434:2019)
Schieber aus Stahl mit geflanschtem Oberteil für die Erdöl-, petrochemische und
verwandte Industrien (ISO/DIS 10434:2019)
Robinets-vannes en acier à chapeau boulonné pour les industries du pétrole, de la
pétrochimie et les industries connexes (ISO/DIS 10434:2019)
Ta slovenski standard je istoveten z: prEN ISO 10434
ICS:
23.060.30 Zapirni ventili (zasuni) Gate valves
75.180.01 Oprema za industrijo nafte in Equipment for petroleum and
zemeljskega plina na splošno natural gas industries in
general
oSIST prEN ISO 10434:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 10434:2020

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oSIST prEN ISO 10434:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 10434
ISO/TC 153 Secretariat: AFNOR
Voting begins on: Voting terminates on:
2019-12-04 2020-02-26
Bolted bonnet steel gate valves for the petroleum,
petrochemical and allied industries
Robinets-vannes en acier à chapeau boulonné pour les industries du pétrole, de la pétrochimie et les
industries connexes
ICS: 75.180.20
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 10434:2019(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2019

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oSIST prEN ISO 10434:2020
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COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
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ii © ISO 2019 – All rights reserved

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oSIST prEN ISO 10434:2020
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Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Pressure/temperature ratings . 3
5 Design . 4
5.1 Body wall thickness . 4
5.2 Bonnet wall thickness . 5
5.3 Body dimensions . 5
5.3.1 Flanged ends . . 5
5.3.2 Butt-welding ends. 7
5.3.3 Body seats . 8
5.4 Bonnet dimensions . 9
5.5 Bonnet-to-body joint.10
5.6 Gate .11
5.7 Yoke .12
5.8 Stem and stem nut .12
5.9 Packing and packing box .14
5.10 Bolting .15
5.11 Operation .15
5.12 Auxiliary connections .16
6 Materials .18
6.1 Materials other than trim materials .18
6.2 Trim materials .19
6.3 Welding for fabrication and repair .21
7 Testing, inspection and examination .21
7.1 Pressure tests .21
7.1.1 General.21
7.1.2 Shell test .21
7.1.3 Closure tightness test . .22
7.1.4 Optional backseat tightness test .23
7.1.5 Optional closure tightness test .23
7.1.6 Fugitive emission testing .23
7.2 Inspection .24
7.2.1 Extent of inspection.24
7.2.2 Site inspection .24
7.3 Examination.24
7.4 Supplementary examination .24
8 Marking .25
8.1 Legibility .25
8.2 Body marking .25
8.3 Ring joint marking .25
8.4 Identification plate marking .25
8.5 Special marking for unidirectional valves .26
9 Preparation for despatch .26
Annex A (informative) Information to be specified by the purchaser .27
Annex B (informative) Identification of valve terms .29
Annex C (informative) Valve material combinations .31
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Bibliography .34
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Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 153, Valves.
This third edition cancels and replaces the second edition (ISO 10434:2004), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— Clause 2 "Normative references" was updated;
— higher PN and Class designations have been added including PN 63, 160, 250 and 400;
— design and manufacturing requirements for the stem to wedge connection have been added.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
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Introduction
The purpose of this document is to establish the basic requirements and practices for flanged and
butt-welding end steel gate valves of bolted bonnet construction that parallel those given in American
Petroleum Institute API Standard 600, eleventh edition, 2001 and to the update of ISO 10434:2004. It
is not the purpose of this document to replace ISO 6002 or any other International Standard that is not
identified with petroleum refinery, petrochemical or natural gas industry applications.
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oSIST prEN ISO 10434:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 10434:2019(E)
Bolted bonnet steel gate valves for the petroleum,
petrochemical and allied industries
1 Scope
This document specifies the requirements for a heavy-duty series of bolted bonnet steel gate valves
for petroleum refinery and related applications where corrosion, erosion and other service conditions
would indicate a need for full port openings, heavy wall sections and large stem diameters.
This document sets forth the requirements for the following gate valve features:
— bolted bonnet;
— outside screw and yoke;
— rising stems;
— nonrising handwheels;
— single or double gate;
— wedge or parallel seating;
— metallic seating surfaces;
— flanged or butt-welding ends.
It covers valves of the nominal sizes DN:
— 25; 32; 40; 50; 65; 80; 100; 150; 200; 250; 300; 350; 400; 450; 500; 600;
corresponding to nominal pipe sizes NPS:
— 1; 1¼; 1½; 2; 2½; 3; 4; 6; 8; 10; 12; 14; 16; 18; 20; 24;
applies for pressure Class designations:
— 150; 300; 600; 900; 1 500; 2 500;
and applies for pressure PN designations:
— 16, 25, 40, 63, 100, 160, 250 and 400.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 5208, Industrial valves — Pressure testing of metallic valves
ISO 5209, General purpose industrial valves — Marking
ISO 5210, Industrial valves — Multi-turn valve actuator attachments
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ISO 5752, Metal valves for use in flanged pipe systems — Face-to-face and centre-to-face dimensions
ISO 9606-1, Qualification testing of welders — Fusion welding — Part 1: Steels
ISO 15848-1, Industrial valves — Measurement, test and qualification procedures for fugitive emissions —
Part 1: Classification system and qualification procedures for type testing of valves
ISO 15848-2, Industrial valves — Measurement, test and qualification procedures for fugitive emissions —
Part 2: Production acceptance test of valves
ASME B1.1, Unified Inch Screw Threads (UN and UNR Thread Form)
ASME B1.5, Acme Screw Threads
ASME B1.8, Stub Acme Screw Threads
ASME B1.12, Class 5 Interference-Fit Thread
ASME B1.20.1, Pipe Threads, General Purpose, Inch
ASME B16.5, Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
ASME B16.10, Face-to Face and End-to-End Dimensions of Valves
ASME B16.11, Forged Fittings, Socket-Welding and Threaded
ASME B16.25, Buttwelding Ends
ASME B16.34-2013, Valves Flanged, Threaded and Welding End
ASME B18.2.2, Nuts for General Applications: Machine Screw Nuts, Hex, Square, Hex Flange, and Coupling
Nuts (Inch Series)
ASME BPVC-IX Boiler and Pressure Vessel Code — Section IX — Welding, Brazing, and fusing Qualifications
ASTM A307, Standard Specification for Carbon Steel Bolts, Studs, and Threaded Rod 60 000 PSI Tensile
Strength
EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 1: Steel flanges
EN 12516-1+A1, Industrial valves — Shell design strength — Part 1: Tabulation method for steel valve shells
MSS-SP-55 Quality Standard for Steel Castings for Valves, Flanges and Fittings, and Other Piping
Components — Visual Method for Evaluation of Surface Irregularities
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
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3.1
PN or Class
alphanumeric designation for pressure-temperature rating that is common for components used
in a piping system, used for reference purposes, comprising the letters "PN" or "Class" followed
by a dimensionless number indirectly related to the pressure retaining capability as a function of
temperature of the component
Note 1 to entry: The number following the letters PN or Class does not represent a measurable value and is not
used for calculation purposes except where specified in the relevant standard. There is no definitive correlation
that links PN designations to Class designations.
Note 2 to entry: The allowable pressure for a valve having a PN or Class number depends on the valve material
and its application temperature and is to be found in tables of pressure/temperature ratings. PN or Class usage is
applicable to steel valves bearing DN or NPS nominal size designations.
Note 3 to entry: See ISO 7268 and ASME B16.34.
3.2
nominal size
DN or NPS
alphanumeric designation of size for components of a pipework system, which is used for reference
purposes, comprising the letters DN or NPS followed by a dimensionless number indirectly related to
the physical size, in millimetres, of the bore or outside diameter of the end connections
Note 1 to entry: The number following the letters DN or NPS does not represent a measurable value and is
not used for calculation purposes except where specified in the relevant standard. Prefix DN or NPS usage is
applicable to steel valves bearing PN or Class designations.
Note 2 to entry: See ISO 6708 and ASME B16.34.
4 Pressure/temperature ratings
4.1 For Class designated valves the applicable pressure/temperature ratings shall be in accordance
with those specified in the tables of ASME B16.34 for Standard Class for the applicable material
specification and the applicable Class.
4.2 For PN designated valves the applicable pressure/temperature ratings shall be in accordance
with those specified in the tables of EN 12516-1+A1 for the applicable material specification and the
applicable PN number.
4.3 Restrictions of temperature or pressure, for example, those imposed by valve special soft seals or
special trim materials, shall be marked on the valve identification plate, see 8.4.
4.4 The temperature for a corresponding pressure rating is the maximum temperature of the pressure-
containing shell of the valve. In general, this temperature is the same as that of the contained fluid. The
use of a pressure rating corresponding to a temperature other than that of the contained fluid is the
responsibility of the user.
4.5 For temperatures below the lowest temperature listed in the pressure/temperature tables (see 4.1,
4.2 and 4.3), the service pressure shall be no greater than the pressure for the lowest listed temperature.
The use of valves at lower temperatures is the responsibility of the user. Consideration should be given to
the loss of ductility and impact strength of many materials at low temperature.
4.6 Double seated valves, in some design configurations, may be capable of trapping liquid in the centre
cavity of the valve when in the closed position. If subjected to an increase in temperature, an excessive
build-up of pressure may occur leading to a pressure boundary failure. Where such condition is possible
it is the responsibility of the user to provide, or require to be provided, means in design, installation
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or operating procedure to assure that the pressure in the valve does not exceed that allowed by this
document for the resultant temperature.
5 Design
5.1 Body wall thickness
5.1.1 A valve body schematic is shown in Figure 1. The minimum body wall thickness, t , at the time
m
of manufacture shall be as given in Table 1, except as indicated in 5.1.2 for butt-welding valve ends.
Additional metal thickness needed for assembly stresses, stress concentrations, and shapes other than
circular shall be determined by individual manufacturers, since these factors vary widely. The body
inside diameter (Figure 1, key 3) shall not be less than that specified in Table 6 for the body seat.
Key
1 junction of body run and body neck 6 body neck
2 body end flange 7 axis of body run
3 body port inside diameter 8 butt-welding end
4 axis of body neck 9 body run
5 body/bonnet flange
Figure 1 — Identification of terms
Table 1 — Minimum wall thickness for body and bonnet
PN designa- 16 25 and 63 and ─ 160 ─ 250 ─ 400
tion 40 100
Class desig- 150 300 600 900 ─ 1 500 ─ 2 500 ─
nation
Nominal size Minimum wall thickness Nominal size
DN t NPS
m
mm
25 6,4 6,4 7,9 12,7 7,7 12,7 8,1 15,0 12,4 1
32 6,4 6,4 8,6 14,2 8,5 14,2 9,4 17,5 14,8 1¼
40 6,4 7,9 9,4 15,0 9,7 15,0 11,4 19,1 18,3 1½
50 8,6 9,7 11,2 19,1 9,2 19,1 13,6 22,4 22,3 2
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Table 1 (continued)
PN designa- 16 25 and 63 and ─ 160 ─ 250 ─ 400
tion 40 100
Class desig- 150 300 600 900 ─ 1 500 ─ 2 500 ─
nation
Nominal size Minimum wall thickness Nominal size
DN t NPS
m
mm
65 9,7 11,2 11,9 22,4 11,2 22,4 16,9 25,4 28,2 2½
80 10,4 11,9 12,7 19,1 13,2 23,9 20,2 30,2 34,1 3
100 11,2 12,7 16,0 21,3 15,8 28,7 42,0 35,8 42,0 4
150 11,9 16,0 19,1 26,2 22,5 38,1 61,8 48,5 61,8 6
200 12,7 17,5 25,4 31,8 29,1 47,8 81,5 62,0 81,5 8
250 14,2 19,1 28,7 36,6 35,7 57,2 101,2 67,6 101,2 10
300 16,0 20,6 31,8 42,2 42,4 66,8 121,0 86,6 121,0 12
350 16,8 22,4 35,1 46,0 49,0 69,9 140,7 — — 14
400 17,5 23,9 38,1 52,3 55,6 79,5 160,4 — — 16
450 18,3 25,4 41,4 57,2 62,3 88,9 180,2 — — 18
500 19,1 26,9 44,5 63,5 68,9 98,6 199,9 — — 20
600 20,6 30,2 50,8 73,2 82,2 114,3 239,4 — — 24
The wall thicknesses for PN 160, PN 250 and PN 400 have been taken directly from EN 12516-1+A1.
5.1.2 The weld end preparation in butt-welding end valves (see 5.3.2) shall not reduce the body wall
thickness to less than the values specified in 5.1.1 within a region closer than t to the outside surface of
m
the body neck, measured along the run direction.
The transition to the weld preparation shall be gradual and the section shall be essentially circular
through the entire length of the transition. Sharp discontinuities or abrupt changes in section in areas
that infringe into the transition shall be avoided, except that test collars or bands, either welded or
integral, are allowed.
In no case shall the thickness be less than 0,77 t at a distance of 2 t from the weld end.
m m
5.2 Bonnet wall thickness
The minimum bonnet wall thickness at the time of manufacture, except for the neck extension that
contains the packing, shall be t as given in Table 1. For the neck extension, the local minimum wall
m
thickness shall be based on the local diameter, e.g. the inside diameter of the stem bore or packing box
bore, and shall be in accordance with Table 2.
5.3 Body dimensions
5.3.1 Flanged ends
5.3.1.1 Body end flanges for PN designated valves shall comply with the dimensional requirements
of EN 1092-1 and body end flanges for Class designated valves shall comply with the dimensional
requirements of ASME B16.5.
If valve end flange bolt holes are specified by the purchaser to be other than those of the respective PN
or Class flange standard, the manufacturer shall ensure that the resultant total flange bolting cross
sectional area is at least as great as that of the bolting being replaced.
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Table 2 — Minimum wall thickness for bonnet neck extension
PN designation 16 25 and 40 63 and 100 160 250 400
Class designation 150 300 600 900 1 500 2 500
a
Bonnet neck exten- Minimum wall thickness
sion inside diameter mm
mm
15 2,8 3,0 3,6 4,2 5,3 7,6
16 2,8 3,1 3,6 4,4 5,6 7,9
17 2,8 3,2 3,7 4,5 5,8 8,2
18 2,9 3,5 3,9 4,7 5,9 8,5
19 3,0 3,8 4,1 5,1 6,1 8,9
20 3,3 4,0 4,2 5,2 6,3 9,2
25 4,0 4,8 4,8 6,3 7,1 11,0
30 4,6 4,8 4,8 6,5 8,2 13,1
35 4,8 4,8 5,1 7,1 9,7 14,6
40 4,9 5,0 5,7 7,5 10,2 16,4
50 5,5 6,2 6,3 7,9 11,6 19,8
60 5,6 6,4 6,8 8,9 13,4 23,2
70 5,6 6,9 7,4 9,9 15,8 26,5
80 5,8 7,2 8,1 11,0 17,4 30,1
90 6,4 7,4 8,8 12,0 19,1 33,2
100 6,4 7,7 9,5 12,8 20,8 36,7
110 6,4 8,1 10,3 14,1 22,9 40,1
120 6,6 8,6 10,9 14,9 24,8 43,5
130 7,1 8,8 11,3 16,2 26,5 46,9
140 7,1 9,2 12,0 17,3 28,3 50,2
a
See 5.2.
5.3.1.2 Face-to-face dimensions for flanged end valves shall be as follows:
— for PN designated valves in accordance with ISO 5752, Basic Series 3, 4 and 5;
— for Class designated valves in accordance with ASME B16.10;
— the tolerances for all face-to-face dimensions shall be in accordance with the note in Table 5.
5.3.1.3 Body end flanges and bonnet flanges shall be cast or forged integral with the body. However,
when specified by the purchaser, forged flanges may be attached by welding.
Welding a flange to a valve body shall be by full penetration butt-welding. The welding operator and
...