Metal ball valves for petroleum, petrochemical and allied industries (ISO 17292:2015)

ISO 17292:2004 specifies the requirements for a series of metal ball valves suitable for petroleum, petrochemical, natural gas plants, and related industrial applications. It covers valves of the nominal sizes DN 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450 and 500, corresponding to nominal pipe sizes NPS 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 4, 6, 8, 10, 12, 14, 16, 18 and 20, and is applicable for pressure designations of Class 150, 300, 600 and 800 (the last applicable only for valves with reduced bore and with threaded and socket welding end), and PN 16, 25 and 40.

Kugelhähne aus Metall für Erdöl-, petrochemische und verwandte Industrien (ISO 17292:2015)

Diese Internationale Norm legt die Anforderungen an eine Reihe von Kugelhähnen aus Metall fest, die für den Einsatz in Anlagen der Erdöl-, petrochemischen, Erdgas- und verwandten Industrien geeignet sind.
Sie gilt für Armaturen mit den Nennweiten DN
- 8; 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 150; 200; 250; 300; 350; 400; 450; 500; 600
entsprechend den Rohr-Nennweiten NPS
- ¼; 3∕8; ½; ¾; 1; 1 ¼; 1 ½; 2; 2 ½; 3; 4; 6; 8; 10; 12; 14; 16; 18; 20; 24
und für folgende Druckbezeichnungen
- Class 150; 300; 600; 800 (Class 800 gilt nur für Armaturen mit Gewinde- und Schweißmuffenenden);
- PN 16; 25; 40.
Die Norm enthält Festlegungen zur Prüfung und Inspektion sowie zu folgenden Armaturen-Merkmalen:
- Flansch- und Anschweißenden: in den Nennweiten 15 ≤ DN ≤ 600 (½ ≤ NPS ≤ 24);
- Schweißmuffen- und Gewindeenden: in den Nennweiten 8 ≤ DN ≤ 50 (¼ ≤ NPS ≤ 2);
- Gehäusesitzöffnungen mit vollem, reduziertem oder zweifach reduziertem Durchgang;
- Werkstoffe.

Robinets à tournant sphérique métalliques pour les industries du pétrole, de la pétrochimie et les industries connexes (ISO 17292:2015)

L'ISO 17292:2004 spécifie les exigences pour une série de robinets à tournant sphérique métalliques appropriés aux installations pétrolières, pétrochimiques et de gaz naturel, ainsi qu'aux applications industrielles connexes. Elle est applicable aux appareils de robinetterie de diamètres nominaux DN 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, correspondant aux dimensions nominales de tuyauterie NPS 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 4, 6, 8, 10, 12, 14, 16, 18 et 20, et s'applique aux désignations de pressions Class 150, 300, 600, 800 (ce dernier s'appliquant uniquement aux appareils de robinetterie à extrémités filetées et à emboîter et à souder), et PN 16, 25, 40.

Kovinski krogelni ventili za naftno industrijo, petrokemijo in podobno industrijo (ISO 17292:2015)

Standard ISO 17292:2004 določa zahteve za serijo kovinskih krogelnih ventilov, primernih za naftno industrijo, petrokemijo, črpališča zemeljskega plina in podobne industrijske aplikacije. Pokriva ventile nazivnih velikosti DN 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450 in 500, ustrezno nazivnim velikostim cevi NPS 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 4, 6, 8, 10, 12, 14, 16, 18 in 20 ter velja za tlačne oznake razreda 150, 300, 600 in 800 (zadnji velja le za ventile z zmanjšanim premerom in z navojnim zaključkom ter notranjim varilnim nastavkom) ter PN 16, 25 in 40.

General Information

Status
Published
Public Enquiry End Date
10-Aug-2014
Publication Date
20-Dec-2015
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
16-Dec-2015
Due Date
20-Feb-2016
Completion Date
21-Dec-2015

RELATIONS

Buy Standard

Standard
SIST EN ISO 17292:2016
English language
35 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 17292:2016
01-februar-2016
1DGRPHãþD
SIST EN ISO 17292:2004

Kovinski krogelni ventili za naftno industrijo, petrokemijo in podobno industrijo

(ISO 17292:2015)

Metal ball valves for petroleum, petrochemical and allied industries (ISO 17292:2015)

Kugelhähne aus Metall für Erdöl-, petrochemische und verwandte Industrien (ISO
17292:2015)
Robinets à tournant sphérique métalliques pour les industries du pétrole, de la
pétrochimie et les industries connexes (ISO 17292:2015)
Ta slovenski standard je istoveten z: EN ISO 17292:2015
ICS:
23.060.20 Zapirni ventili (kroglasti in Ball and plug valves
pipe)
75.180.01 Oprema za industrijo nafte in Equipment for petroleum and
zemeljskega plina na splošno natural gas industries in
general
SIST EN ISO 17292:2016 de

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

---------------------- Page: 1 ----------------------
SIST EN ISO 17292:2016
---------------------- Page: 2 ----------------------
SIST EN ISO 17292:2016
EN ISO 17292
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2015
EUROPÄISCHE NORM
ICS 23.060.20; 75.200 Supersedes EN ISO 17292:2004
English Version
Metal ball valves for petroleum, petrochemical and allied
industries (ISO 17292:2015)

Robinets à tournant sphérique métalliques pour les Kugelhähne aus Metall für Erdöl-, petrochemische und

industries du pétrole, de la pétrochimie et les verwandte Industrien (ISO 17292:2015)

industries connexes (ISO 17292:2015)
This European Standard was approved by CEN on 7 November 2015.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels

© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17292:2015 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 17292:2016
EN ISO 17292:2015 (E)
Contents Page

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

---------------------- Page: 4 ----------------------
SIST EN ISO 17292:2016
EN ISO 17292:2015 (E)
European foreword

This document (EN ISO 17292:2015) has been prepared by Technical Committee ISO/TC 153 "Valves"

in collaboration with the 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 June 2016, and conflicting national standards shall be

withdrawn at the latest by June 2016.

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

patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent

rights.
This document supersedes EN ISO 17292:2004.

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, Former Yugoslav Republic of Macedonia,

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

Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 17292:2015 has been approved by CEN as EN ISO 17292:2015 without any modification.

---------------------- Page: 5 ----------------------
SIST EN ISO 17292:2016
---------------------- Page: 6 ----------------------
SIST EN ISO 17292:2016
INTERNATIONAL ISO
STANDARD 17292
Second edition
2015-11-15
Metal ball valves for petroleum,
petrochemical and allied industries
Robinets à tournant sphérique métalliques pour les industries du
pétrole, de la pétrochimie et les industries connexes
Reference number
ISO 17292:2015(E)
ISO 2015
---------------------- Page: 7 ----------------------
SIST EN ISO 17292:2016
ISO 17292:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland

All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 17292:2016
ISO 17292:2015(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ..............................................................................................................................................................................................................................vii

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 3

4 Pressure/temperature ratings .............................................................................................................................................................. 4

4.1 Valve rating ................................................................................................................................................................................................. 4

4.2 Shell rating .................................................................................................................................................................................................. 4

4.3 Seat and seal rating ............................................................................................................................................................................. 4

5 Design .............................................................................................................................................................................................................................. 5

5.1 Flow passageway .................................................................................................................................................................................. 5

5.2 Body .................................................................................................................................................................................................................. 5

5.2.1 Body wall thickness ....................................................................................................................................................... 5

5.2.2 Flanged ends ...................................................................... .................................................................................................. 7

5.2.3 Butt-welding ends........................................................................................................................................................... 7

5.2.4 Socket welding ends ..................................................................................................................................................... 8

5.2.5 Threaded ends ................................................................................................................................................................10

5.2.6 Body openings .................................................................................................................................................................10

5.2.7 Anti-static design ..........................................................................................................................................................11

5.2.8 Anti-blow-out stem .....................................................................................................................................................11

5.2.9 Ball-stem construction ............................................................................................................................................11

5.2.10 Ball construction ...........................................................................................................................................................11

5.2.11 Operating means ...........................................................................................................................................................11

5.2.12 Glands .....................................................................................................................................................................................12

5.2.13 End flange facing interruptions .......................................................................................................................12

5.2.14 Shell joints ..........................................................................................................................................................................13

5.2.15 Packing gland bolting ................................................................................................................................................14

5.2.16 Fluid thermal expansion ........................................................................................................................................14

6 Materials ....................................................................................................................................................................................................................15

6.1 Shell ...............................................................................................................................................................................................................15

6.2 Shell material repair ........................................................................................................................................................................15

6.3 Trim ...............................................................................................................................................................................................................15

6.4 Identification plate ...........................................................................................................................................................................15

6.5 Bolting .........................................................................................................................................................................................................15

6.6 Seals ...............................................................................................................................................................................................................15

6.7 Threaded plugs ....................................................................................................................................................................................15

6.8 Low temperature service ............................................................................................................................................................15

6.9 Hydrogen sulfide environment ..............................................................................................................................................15

7 Marking .......................................................................................................................................................................................................................16

7.1 Legibility ....................................................................................................................................................................................................16

7.2 Body marking ........................................................................................................................................................................................16

7.3 Ring joint marking ............................................................................................................................................................................16

7.4 Identification plate ...........................................................................................................................................................................16

7.5 Special marking for unidirectional valves ....................................................................................................................17

8 Testing and inspection ................................................................................................................................................................................17

8.1 Pressure tests ........................................................................................................................................................................................17

8.1.1 General...................................................................................................................................................................................17

8.1.2 Shell test ...............................................................................................................................................................................17

8.1.3 Closure tightness test ........................................................................................................................................... .....18

8.2 Inspection .................................................................................................................................................................................................19

8.2.1 Extent of inspection....................................................................................................................................................19

© ISO 2015 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 17292:2016
ISO 17292:2015(E)

8.2.2 Site inspection .................................................................................................................................................................19

8.3 Examination............................................................................................................................................................................................19

8.4 Supplementary examination ....................................................................................................................................................19

9 Preparation for despatch ..........................................................................................................................................................................20

Annex A (informative) Information to be specified by the purchaser ............................................................................21

Annex B (informative) Identification of valve parts ..........................................................................................................................23

Bibliography .............................................................................................................................................................................................................................25

iv © ISO 2015 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 17292:2016
ISO 17292:2015(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 on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 153, Valves, Subcommittee SC 1, Design,

manufacture, marking and testing.

This second edition cancels and replaces the first edition (ISO 17292:2004), which has been technically

revised with the following changes:
— scope increased to include DN 600, NPS 24, PN 63, and PN 100;
— Clause 2 “Normative references” was updated;
— Class 800 no longer restricted to reduce bore only;

— inclusion of reference and purchaser option to request valves conforming to ISO 15156 or NACE MR0103;

— expanded seat materials to include modified PTFE and reinforced modified PTFE;

— in Table 1, inclusion of higher pressure temperature ratings that are more closely aligned with

BS 5351 and account for improved performance attained from modified PTFE; separate listing for

trunnion valves has been removed from Table 1;
— revised selected bore diameters in Table 2;

— purchaser needs to specify long or short pattern face-to-face dimension on ASME flanged valves;

— clarification that the strength of the stem above the packing shall be stronger than the internal

portion at the maximum rated temperature;
— addition of purchaser option for requesting valve locking device;

— reduction of the permissible radial gap on end face flange interruptions to 0,8 mm;

— added provision for purchaser to request manufacturer to provide method for preventing excessive

pressure when fluid is trapped in centre cavity between seats;
© ISO 2015 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 17292:2016
ISO 17292:2015(E)

— expanded required information on identification tag to include separate trim and seat/seal

materials. In addition, material for identification plate limited to stainless steel or nickel alloys;

— added requirement that thread sealant used on plugs for tapped auxiliary connections be capable of

the fully pressure-temperature rating of the valve;
— added purchaser option to request export packaging;

— added purchaser option to request manufacturer identify recommended spare parts.

vi © ISO 2015 – All rights reserved
---------------------- Page: 12 ----------------------
SIST EN ISO 17292:2016
ISO 17292:2015(E)
Introduction

The purpose of this International Standard is the establishment, in ISO format, of basic requirements

and practices for flanged, butt-welding, socket welding, and threaded end steel ball valves having flow

passageways identified as full bore, reduced bore, and double reduced bore seat openings suitable for

petroleum, petrochemical, and allied industries applications.

It is not the purpose of this International Standard to replace ISO 7121 or any other International

Standard that is not identified with petroleum refinery, petrochemical, or natural gas industry

applications.

In this International Standard, flanged end Class-designated valves have flanges in accordance with

ASME B16.5. Flanged end PN-designated valves have flanges in accordance with EN 1092-1. Valves with

ends threaded may have threads to either ISO 7-1 or ASME B1.20.1.
© ISO 2015 – All rights reserved vii
---------------------- Page: 13 ----------------------
SIST EN ISO 17292:2016
---------------------- Page: 14 ----------------------
SIST EN ISO 17292:2016
INTERNATIONAL STANDARD ISO 17292:2015(E)
Metal ball valves for petroleum, petrochemical and allied
industries
1 Scope

This International Standard specifies the requirements for a series of metal ball valves suitable for

petroleum, petrochemical, natural gas plants, and related industrial applications.

It covers valves of the nominal sizes DN:

— 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600;

corresponding to nominal pipe sizes NPS:
— ¼, ⅜, ½, ¾, 1, 1 ¼, 1 ½, 2, 2 ½, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24;
and applies for pressure designations:

— Class 150; 300; 600; 800 (Class 800 applies only for valves with threaded and socket welding end);

— PN 16, 25, 40, 63, 100.

It includes provisions for testing and inspection and for valve characteristics as follows:

— flanged and butt-welded ends, in sizes 15 ≤ DN ≤ 600 (½ ≤ NPS ≤ 24);
— socket welding and threaded ends, in sizes 8 ≤ DN ≤ 50 (¼ ≤ NPS ≤ 2);

— body seat openings designated as full bore, reduced bore, and double reduced bore;

— materials.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. 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 7-2, Pipe threads where pressure-tight joints are made on the threads — Part 2: Verification by means

of limit gauges
ISO 261, ISO general purpose metric screw threads — General plan

ISO 965-2, ISO general purpose metric screw threads — Tolerances — Part 2: Limits of sizes for general

purpose external and internal screw threads — Medium quality
ISO 4032, Hexagon regular nuts (style 1) — Product grades A and B
ISO 4033, Hexagon high nuts (style 2) — Product grades A and B
ISO 4034, Hexagon regular nuts (style 1) — Product grade C
ISO 5208, Industrial valves — Pressure testing of metallic valves
ISO 5209, General purpose industrial valves — Marking
© ISO 2015 – All rights reserved 1
---------------------- Page: 15 ----------------------
SIST EN ISO 17292:2016
ISO 17292:2015(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 15156-1, Petroleum and natural gas industries — Materials for use in H2S-containing environments in

oil and gas production — Part 1: General principles for selection of cracking-resistant materials

ISO 15156-2, Petroleum and natural gas industries — Materials for use in H2S-containing environments in

oil and gas production — Part 2: Cracking-resistant carbon and low-alloy steels, and the use of cast irons

ISO 15156-3, Petroleum and natural gas industries — Materials for use in H2S-containing environments in

oil and gas production — Part 3: Cracking-resistant CRAs (corrosion resistant alloys) and other alloys

ISO 15607, Specification and qualification of welding procedures for metallic materials — General rules

ISO 15609-1, Specification and qualification of welding procedures for metallic materials — Welding

procedure specification — Part 1: Arc welding

ISO 15610, Specification and qualification of welding procedures for metallic materials — Qualification

based on tested welding consumables

ISO 15614-1, Specification and qualification of welding procedures for metallic materials — Welding

procedure test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys

ISO 15614-2, Specification and qualification of welding procedures for metallic materials — Welding

procedure test — Part 2: Arc welding of aluminium and its alloys

EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN

designated — Part 1: Steel flanges

EN 10269, Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

EN 12516-1, Industrial valves — Shell design strength — Part 1: Tabulation method for steel valve shells

EN 12982, Industrial valves — End-to-end and centre-to-end dimensions for butt welding end valves

ASME B1.1, Unified Inch Screw Threads (UN and UNR Thread Form)
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 B16.34:2013, 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

MSS-SP-55, Quality Standard for Steel Castings for Valves, Flanges and Fittings, and Other Piping

Components — Visual Method for Evaluation of Surface Irregularities

NACE MR0103, Materials Resistant to Sulfide Stress Cracking in Corrosive Petroleum Refining Environments

2 © ISO 2015 – All rights reserved
---------------------- Page: 16 ----------------------
SIST EN ISO 17292:2016
ISO 17292:2015(E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1

alphanumeric designation of size common for components used in a piping system, used for reference

purposes, comprising the letters DN followed by a dimensionless number indirectly related to the

physical size of the bore or outside diameter of the end connection as appropriate

Note 1 to entry: The dimensionless number following DN does not represent a measurable value and is not used

for calculation purposes except where specified in this International Standard. Prefix DN usage is applicable to

steel valves bearing PN designations.
3.2
nominal pipe size
NPS

alphanumeric designation of size common for components used in a piping system, used for reference

purposes, comprising the letters NPS followed by a dimensionless number indirectly related to the

physical size of the bore or outside diameter of the end connection as appropriate

Note 1 to entry: The dimensionless number may be used as a valve size identifier without the prefix NPS. The

dimensionless size identification number does not represent a measurable value and is not used for calculation

purposes except where specified in this International Standard. Prefix NPS usage is applicable to steel valves

bearing Class designations.
3.3

dimensionless alphanumeric designation used to define a maximum pressure/temperature

rating applicable to the valve pressure containing shell comprising the letters PN followed by a

dimensionless whole number
Note 1 to entry: The numb
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.