Bolted bonnet steel gate valves for the petroleum, petrochemical and allied industries (ISO 10434:2020)

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 can
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;
— non-rising 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.

Schieber aus Stahl mit geflanschtem Oberteil für die Erdöl-, petrochemische und verwandte Industrien (ISO 10434:2020)

Dieses Dokument legt die Anforderungen an Stahl-Schieber schwerer Ausführung mit geflanschtem Oberteil für Anwendungen in Erdölraffinerien und für ähnliche Zwecke fest, wo Korrosion, Erosion und andere Betriebsbedingungen vollen Durchgang, große Wandquerschnitte und große Spindeldurchmesser erfordern können.
In diesem Dokument werden Anforderungen für Schieber mit folgenden Merkmalen festgelegt:
- geflanschtes Oberteil;
- außenliegendes Spindelgewinde und Bügelaufsatz;
- steigende Spindeln;
- nichtsteigende Handräder;
- einteiliger oder zweiteiliger Abschlusskörper;
- Keil  oder Parallelsitz;
- metallische Sitzoberflächen;
- Flanschanschluss oder Anschweißende.
Es umfasst Schieber mit folgenden Nennweiten DN:
- 25; 32; 40; 50; 65; 80; 100; 150; 200; 250; 300; 350; 400; 450; 500; 600;
für die entsprechenden Rohr-Nennweiten NPS:
- 1; 1¼; 1½; 2; 2½; 3; 4; 6; 8; 10; 12; 14; 16; 18; 20; 24;
gilt für die entsprechenden Class-Werte:
- 150; 300; 600; 900; 1 500; 2 500;
und gilt für PN Werte:
- 16, 25, 40, 63, 100, 160, 250 und 400.

Robinets-vannes en acier à chapeau boulonné pour les industries du pétrole, de la pétrochimie et les industries connexes (ISO 10434:2020)

Le présent document spécifie les exigences pour une large gamme de robinets-vannes en acier à chapeau boulonné pour les raffineries de pétrole et applications connexes pour lesquelles la corrosion, l'érosion et autres conditions relatives au service peuvent impliquer l'utilisation d'orifices de passage intégral, de parois épaisses et de tiges de grands diamètres.
Le présent document donne les exigences pour les éléments des robinets-vannes suivants:
— chapeau boulonné;
— tige à filetage extérieur et arcade;
— tiges montantes;
— volants non montants;
— obturateur à simple ou double opercule;
— sièges obliques ou parallèles;
— surfaces de portées métalliques;
— extrémités à brides ou à souder en bout.
Il est applicable aux appareils de robinetterie de diamètres nominaux DN:
— 25; 32; 40; 50; 65; 80; 100; 150; 200; 250; 300; 350; 400; 450; 500; 600;
correspondant aux dimensions nominales de tuyauterie NPS:
— 1; 1¼; 1½; 2; 2½; 3; 4; 6; 8; 10; 12; 14; 16; 18; 20; 24;
pour les désignations de pressions Class:
— 150; 300; 600; 900; 1 500; 2 500;
et pour les désignations de pressions PN:
— 16, 25, 40, 63, 100, 160, 250 et 400.

Jekleni zasuni s prirobničnim zgornjim delom za naftno industrijo, petrokemijo in podobno industrijo (ISO 10434:2020)

General Information

Status
Published
Public Enquiry End Date
19-Feb-2020
Publication Date
04-Oct-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
24-Sep-2020
Due Date
29-Nov-2020
Completion Date
05-Oct-2020

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SLOVENSKI STANDARD
SIST EN ISO 10434:2020
01-november-2020
Nadomešča:
SIST EN ISO 10434:2004

Jekleni zasuni s prirobničnim zgornjim delom za naftno industrijo, petrokemijo in

podobno industrijo (ISO 10434:2020)

Bolted bonnet steel gate valves for the petroleum, petrochemical and allied industries

(ISO 10434:2020)
Schieber aus Stahl mit geflanschtem Oberteil für die Erdöl-, petrochemische und
verwandte Industrien (ISO 10434:2020)

Robinets-vannes en acier à chapeau boulonné pour les industries du pétrole, de la

pétrochimie et les industries connexes (ISO 10434:2020)
Ta slovenski standard je istoveten z: EN ISO 10434:2020
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
SIST EN ISO 10434:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 10434:2020
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SIST EN ISO 10434:2020
EN ISO 10434
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 75.180.20 Supersedes EN ISO 10434:2004
English Version
Bolted bonnet steel gate valves for the petroleum,
petrochemical and allied industries (ISO 10434:2020)

Robinets-vannes en acier à chapeau boulonné pour les Schieber aus Stahl mit geflanschtem Oberteil für die

industries du pétrole, de la pétrochimie et les Erdöl-, petrochemische und verwandte Industrien (ISO

industries connexes (ISO 10434:2020) 10434:2020)
This European Standard was approved by CEN on 21 August 2020.

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 CEN-CENELEC 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 CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10434:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 10434:2020
EN ISO 10434:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 10434:2020
EN ISO 10434:2020 (E)
European foreword

This document (EN ISO 10434:2020) has been prepared by Technical Committee ISO/TC 153 "Valves"

in collaboration with 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 March 2021, and conflicting national standards shall

be withdrawn at the latest by March 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 10434:2004.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 10434:2020 has been approved by CEN as EN ISO 10434:2020 without any modification.

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SIST EN ISO 10434:2020
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SIST EN ISO 10434:2020
INTERNATIONAL ISO
STANDARD 10434
Third edition
2020-08
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
Reference number
ISO 10434:2020(E)
ISO 2020
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SIST EN ISO 10434:2020
ISO 10434:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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SIST EN ISO 10434:2020
ISO 10434:2020(E)
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 ................................................................................................................................................................................... 6

5.3.1 Flanged ends ...................................................................... .................................................................................................. 6

5.3.2 Butt-welding ends........................................................................................................................................................... 7

5.3.3 Body seats .............................................................................................................................................................................. 9

5.4 Bonnet dimensions ...........................................................................................................................................................................10

5.5 Bonnet-to-body joint.......................................................................................................................................................................11

5.6 Gate ................................................................................................................................................................................................................12

5.7 Yoke ................................................................................................................................................................................................................13

5.8 Stem and stem nut ............................................................................................................................................................................13

5.9 Packing and packing box .............................................................................................................................................................15

5.10 Bolting .........................................................................................................................................................................................................16

5.11 Operation ..................................................................................................................................................................................................16

5.12 Auxiliary connections .....................................................................................................................................................................17

6 Materials ....................................................................................................................................................................................................................19

6.1 Materials other than trim materials ..................................................................................................................................19

6.2 Trim materials ......................................................................................................................................................................................20

6.3 Welding for fabrication and repair .....................................................................................................................................22

7 Testing, inspection and examination ...........................................................................................................................................23

7.1 Pressure tests ........................................................................................................................................................................................23

7.1.1 General...................................................................................................................................................................................23

7.1.2 Shell test ...............................................................................................................................................................................23

7.1.3 Closure tightness test ........................................................................................................................................... .....23

7.1.4 Optional backseat tightness test .....................................................................................................................25

7.1.5 Optional closure tightness test .........................................................................................................................25

7.1.6 Fugitive emission testing .......................................................................................................................................25

7.2 Inspection .................................................................................................................................................................................................26

7.2.1 Extent of inspection....................................................................................................................................................26

7.2.2 Site inspection .................................................................................................................................................................26

7.3 Examination............................................................................................................................................................................................26

7.4 Supplementary examination ....................................................................................................................................................26

8 Marking .......................................................................................................................................................................................................................26

8.1 Legibility ....................................................................................................................................................................................................26

8.2 Body marking ........................................................................................................................................................................................27

8.3 Ring joint marking ............................................................................................................................................................................27

8.4 Identification plate marking .....................................................................................................................................................27

8.5 Special marking for unidirectional valves ....................................................................................................................27

9 Preparation for despatch ..........................................................................................................................................................................28

Annex A (informative) Information to be specified by the purchaser ............................................................................29

Annex B (informative) Identification of valve terms .........................................................................................................................31

Annex C (informative) Valve material combinations ........................................................................................................................34

© ISO 2020 – All rights reserved iii
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SIST EN ISO 10434:2020
ISO 10434:2020(E)

Bibliography .............................................................................................................................................................................................................................38

iv © ISO 2020 – All rights reserved
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SIST EN ISO 10434:2020
ISO 10434:2020(E)
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, in collaboration with the

European Committee for Standardization (CEN) Technical Committee CEN/TC 69, Industrial valves, in

accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

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.
© ISO 2020 – All rights reserved v
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SIST EN ISO 10434:2020
ISO 10434:2020(E)
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 is parallel to those given in American

Petroleum Institute API Standard 600, eleventh edition.
vi © ISO 2020 – All rights reserved
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SIST EN ISO 10434:2020
INTERNATIONAL STANDARD ISO 10434:2020(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 can

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;
— non-rising 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
© ISO 2020 – All rights reserved 1
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SIST EN ISO 10434:2020
ISO 10434:2020(E)

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, 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 12516-1:2014+A1: 2018, 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 https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
2 © ISO 2020 – All rights reserved
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SIST EN ISO 10434:2020
ISO 10434:2020(E)
3.1
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 (3.2) designations.
Note 3 to entry: See ISO 7268 and ASME B16.34.
3.2
nominal size
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 (3.1) 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 12516-1:2014+A1:2018 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,

© ISO 2020 – All rights reserved 3
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SIST EN ISO 10434:2020
ISO 10434:2020(E)

it is the responsibility of the user to provide, or require to be provided, means in design, installation

or operating procedure to ensure 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

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
4 © ISO 2020 – All rights reserved
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SIST EN ISO 10434:2020
ISO 10434:2020(E)
Table 1 — Minimum wall thickness for body and bonnet
PN 16 25 and 63 and ─ 160 ─ 250 ─ 400
designation 40 100
Class 150 300 600 900 ─ 1 500 ─ 2 500 ─
designation
Nominal size Minimum wall thickness Nominal size
DN NPS
(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
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.

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

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 t
...

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