SIST EN 10226-3:2005
(Main)Pipes threads where pressure tight joint are made on the threads - Part 3: Verification by means of limit gauges
Pipes threads where pressure tight joint are made on the threads - Part 3: Verification by means of limit gauges
This part of EN 10226 specifies a process using limit gauges, for the validation of taper internal and external threads and parallel internal threads on piping systems components and other products, the dimensions and tolerances of which are detailed in EN 10226-1 and prEN 10226-2.
The gauging system described may not be suitable, without special precautions, for gauging of threads on injection moulded plastic workpieces.
This part of EN 10226 does not cover completely all the requirements necessary for full control of thread quality and dimensions. Additional control of tools and equipment and visual inspection during production are required to ensure complete compliance with EN 10226-1 and prEN 10226-2, for example the length of useful thread on internally threaded workpieces should be checked by direct measurement.
Annex A gives a summary of the gauges included in this part of EN 10226, together with details of the thread elements controlled by each gauge and gauge identification numbers.
In the event of a dispute over compliance with the requirements of EN 10226-1 and prEN 10226-2, the gauges in this part of EN 10226 are to be considered as decisive for the thread elements which they control on the workpiece.
Rohrgewinde für im Gewinde dichtende Verbindungen - Teil 3: Prüfung mit Grenzlehren
Dieses Dokument legt das Prüfen von kegeligen Innen- und Außengewinden sowie zylindrischen Innengewinden an Rohrleitungsteilen und an anderen Produkten mit Grenzlehren fest. Die Gewindemaße und die Toleranzen sind in EN 10226-1 und prEN 10226-2 angegeben.
Das beschriebene Lehrensystem ist nicht für die Prüfung von Gewinden an Spritzgussteilen aus Kunststoff ohne besondere Sicherheitsmaßnahmen geeignet.
Dieses Dokument erfüllt nicht alle Anforderungen, die zu einer vollständigen Prüfung der Qualität und der Maße von Gewinden notwendig sind. Eine zusätzliche Prüfung der Werkzeuge und der Einrichtungen sowie eine Sichtprüfung während der Herstellung sind erforderlich, um die volle Übereinstimmung mit EN 10226-1 und prEN 10226-2 zu sichern, z. B. sollte die nutzbare Gewindelänge an Werkstücken mit Innengewinde durch anzeigendes Messen geprüft werden.
Der Anhang A enthält eine Übersicht über die in diesem Dokument beschriebenen Lehren in Verbindung mit Angaben zu den Gewindeelementen, die mit diesen Lehren geprüft werden, sowie die Lehren-Identifizierungsnummern.
In Streitfällen der Übereinstimmung mit den Anforderungen nach EN 10226-1 und prEN 10226-2 sind die Lehren nach diesem Dokument, mit denen das Gewinde an einem Werkstück geprüft wird, entscheidend.
Filetage de tuyauteries pour raccordement avec étanchéité par le filetage - Partie 3: Vérification par calibres a limites
Le présent document spécifie les regles pour la vérification par calibres a limites des filetages coniques intérieurs et extérieurs et des filetages intérieurs cylindriques sur les composants des systemes de canalisations et autres produits, dont les dimensions et tolérances sont détaillées dans l'EN 10226 1 et le prEN 10226 2.
Si aucune précaution particuliere n'est prise, le systeme de vérification décrit peut ne pas etre applicable pour la vérification de filetages sur des pieces plastiques moulées par injection.
Le présent document ne couvre pas toutes les exigences nécessaires pour une vérification complete des dimensions et de la qualité du filetage. Des contrôles supplémentaires des outillages et équipements et des contrôles visuels sont également nécessaires au cours de la production pour satisfaire totalement a l'EN 10226 1 et au prEN 10226 2, par exemple, il convient de contrôler la longueur du filetage utile sur les pieces filetées intérieurement par un mesurage direct.
L'Annexe A donne un résumé des calibres figurant dans le présent document, et indique les caractéristiques des éléments de filetage contrôlés par chaque calibre ainsi que les numéros d'identification des calibres.
En cas de contestation sur le respect des prescriptions de l'EN 10226 1 et du prEN 10226 2, les calibres spécifiés dans le présent document feront foi pour les éléments du filetage qu'ils contrôlent sur la piece.
Cevni navoji za zveze, ki tesnijo z navoji – 3. del: Kontrola s kalibri
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 10226-3:2005
01-maj-2005
Cevni navoji za zveze, ki tesnijo z navoji – 3. del: Kontrola s kalibri
Pipes threads where pressure tight joint are made on the threads - Part 3: Verification by
means of limit gauges
Rohrgewinde für im Gewinde dichtende Verbindungen - Teil 3: Prüfung mit Grenzlehren
Filetage de tuyauteries pour raccordement avec étanchéité par le filetage - Partie 3:
Vérification par calibres a limites
Ta slovenski standard je istoveten z: EN 10226-3:2005
ICS:
21.040.30 Posebni navoji Special screw threads
SIST EN 10226-3:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 10226-3:2005
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SIST EN 10226-3:2005
EUROPEAN STANDARD
EN 10226-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2005
ICS 21.040.30
English version
Pipes threads where pressure tight joint are made on the
threads - Part 3: Verification by means of limit gauges
Filetage de tuyauteries pour raccordement avec étanchéité Rohrgewinde für im Gewinde dichtende Verbindungen - Teil
par le filetage - Partie 3: Vérification par calibres à limites 3: Prüfung mit Grenzlehren
This European Standard was approved by CEN on 22 December 2004.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, 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
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10226-3:2005: E
worldwide for CEN national Members.
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
Contents
page
Foreword.3
1 Scope .4
2 Normative reference .4
3 Terms and definitions .4
4 Symbols .5
5 Design of gauges.6
5.1 General.6
5.2 Taper full form threaded plug gauges (gauges No. 1 and No. 2).7
5.3 Parallel full form threaded ring gauge (gauge No. 3).11
5.4 Taper plain ring gauge (gauge No. 4) .13
5.5 Taper modified thread form check plug gauge (gauge No. 5) .14
5.6 Parallel modified thread form check ring gauge (gauge No. 6) .16
6 Use of gauges and checking of pipe threads .18
6.1 General.18
6.2 Checking of internal taper (Rc) and internal parallel (Rp) threads.19
6.3 Checking of external taper (R) threads.20
7 Gauge dimensions and manufacturing tolerances, checking of new gauges and checking
gauges for wear .21
7.1 Gauge dimensions and manufacturing tolerances.21
7.2 Checking of new gauges.28
7.3 Checking gauges for wear .31
7.4 Marking of gauges .33
Annex A (normative) Summary of gauges .34
2
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
Foreword
This document (EN 10226:2005) has been prepared by ECISS/TC 29 “Steel tubes and fittings for steel tubes”, the
secretariat of which is held by UNI.
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 August 2005, and conflicting national standards shall be withdrawn at the latest by
August 2005.
This document is based, with editorial modification, on ISO 7-2: Pipe threads where pressure-tight joints are made
on the threads – Part 2: Verification by means of limit gauges.
EN 10226 consists of the following parts, under the general title Pipe threads where pressure-tight joints are made
on the threads:
Part 1: Taper external threads and parallel internal threads - Dimensions, tolerances and designation
Part 2: Taper external threads and taper internal threads - Dimensions, tolerances and designation
Part 3: Verification by means of limit gauges
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
3
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
1 Scope
This document specifies a process using limit gauges, for the validation of taper internal and external threads and
parallel internal threads on piping systems components and other products, the dimensions and tolerances of
which are detailed in EN 10226-1 and prEN 10226-2.
The gauging system described may not be suitable, without special precautions, for gauging of threads on injection
moulded plastic workpieces.
This document does not cover completely all the requirements necessary for full control of thread quality and
dimensions. Additional control of tools and equipment and visual inspection during production are required to
ensure complete compliance with EN 10226-1 and prEN 10226-2, for example the length of useful thread on
internally threaded workpieces should be checked by direct measurement.
Annex A gives a summary of the gauges included in this document, together with details of the thread elements
controlled by each gauge and gauge identification numbers.
In the event of a dispute over compliance with the requirements of EN 10226-1 and prEN 10226-2, the gauges in
this document are to be considered as decisive for the thread elements which they control on the workpiece.
2 Normative reference
The following referenced documents are indispensable for the application 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.
EN 10226-1:2004, Pipe threads where pressure-tight joints are made on the threads — Part 1: Taper external
threads and parallel internal threads — Dimensions, tolerances and designation.
prEN 10226-2:2002, Pipe threads where pressure-tight joints are made on the threads — Part 2: Taper external
threads and taper internal threads — Dimensions, tolerances and designation.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 10226-1:2004 and prEN 10226-2:2002
and the following apply.
accommodation length
distance from the face of an internally threaded workpiece to the first obstruction which the externally threaded
workpiece will encounter on assembly.
See Figure 3
4
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
4 Symbols
The symbols used and their explanations are given in Table 1.
Table 1 — Symbols
Symbol Explanation
Width of clearance groove at major diameter of parallel full form threaded ring gauges and
b
1
minor diameter of taper full form threaded plug gauges
Width of clearance groove at major diameter of parallel modified thread form check ring
b
2
gauges and at minor diameter of taper modified thread form check plug gauges
c Height of tolerance step on plug gauges
D
Major diameter of internal thread at gauge plane
D Minor diameter of internal thread at gauge plane
1
D Pitch diameter of internal thread at gauge plane
2
D
Counterbore diameter of parallel full form threaded ring gauge and taper plain ring gauge
4
d Major diameter of external thread at gauge plane
d
Minor diameter of external thread at gauge plane
1
d Pitch diameter of external thread at gauge plane
2
Radial distance from the pitch diameter to the truncated crest, along the centreline of the
F
thread profile
Overall length of taper full form threaded plug gauge and taper modified thread form check
l
0
plug gauge
l
Length from end face to the gauge plane on taper full form threaded plug gauge
1
l
Length of tolerance step on plug gauges
2
Overall length of parallel full form threaded ring gauge, parallel modified thread form check
l
3
ring gauge and length from gauge plane to small end of taper plain ring gauge
l Length of tolerance step on ring gauges
4
l Depth of counterbore on parallel full form threaded ring gauge
5
l
Overall length of taper full form threaded plug gauge with relief
6
l Width of relief on taper full form threaded plug gauge with relief
7
l Length from relief on taper full form threaded plug gauge with relief to large end of gauge
8
l Overall length of taper plain ring gauge
9
l Depth of counterbore on taper plain ring gauge
10
Distance from step on gauge Nos. 1 and 2 to face of gauge No. 6 when verifying pitch
l
11
diameter of new gauge Nos. 1 and 2
Distance from step on gauge No. 5 to face of gauge No. 6 when verifying pitch diameter of
l
12
new gauge No. 6
Distance from step on gauge Nos. 1 and 2 to face of gauge No. 6 when checking pitch
l
13
diameter of gauge Nos. 1 and 2 for wear
5
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
Table 1 (concluded)
Symbol Explanation
Distance from step on gauge No. 5 to face of gauge No. 3 when checking pitch diameter of
l
14
gauge No. 3 for wear
P Pitch
T /2 Tolerance on flank angle of full form threads
α
1
T /2 Tolerance on flank angle of modified form threads
α
2
Tolerance on pitch diameter for taper modified thread form check plug gauge and parallel
T
CP
modified thread form check ring gauge
T
Tolerance on pitch
P
T Tolerance on pitch diameter and wear allowance for taper full form threaded plug gauges
PL
Tolerance on pitch diameter and wear allowance for parallel full form threaded ring gauge and
T
R
tolerance on diameter and wear allowance for taper plain ring gauge
T Tolerance on the gauge length of an external thread
1
T Tolerance on position of gauge plane on an internal thread
2
Permissible wear on diameter of all gauges except taper modified thread form check plug
W
gauges
NOTE The values of D, D , D , d, d and d shown in Table 2 to Table 7 are basic values and are subject to the
1 2 1 2
manufacturing tolerances specified in Clause 7.
5 Design of gauges
5.1 General
The taper full form threaded plug gauges and parallel full form threaded ring gauges (see 5.2 and 5.3) together with
the taper plain ring gauges (see 5.4) have been chosen as representing the requirements for mating components
or products within the tolerances of EN 10226-1 and prEN 10226-2.
Because of the 1:16 taper of the gauge and/or the threaded workpiece, it is possible to represent the maximum and
minimum limits of diameter by means of tolerance steps within the axial length of the gauges.
The plain ring gauges included in this document, allow a combined check of the major diameter and the length of
useful thread of externally threaded workpieces.
The taper modified thread form check plug gauge (see 5.5) and parallel modified thread form check ring gauge
(see 5.6) for checking the manufacturing tolerances and wear allowances for the parallel full form threaded ring
gauges and taper full form threaded plug gauges respectively, are made to a modified thread form.
Some dimensions given in this document are more precise than the equivalent dimensions given in
EN 10226-1 and prEN 10226-2. This greater precision is only intended to assist the gauge manufacturing process
and is of no practical significance when using the gauges.
NOTE The expression "full form" has been used to describe those threaded plug and ring gauges which may be full form or
alternatively have thread form relief at the discretion of the manufacturer, so as to differentiate from those threaded check plug
and check ring gauges which are always of modified thread form.
6
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
5.2 Taper full form threaded plug gauges (gauges No. 1 and No. 2)
5.2.1 Taper full form threaded plug gauge (gauge No. 1)
This gauge is a 1:16 taper full form threaded plug gauge (see Figure 1) and is suitable for checking the major
diameter (D) and pitch diameter (D ) at the gauge plane of internal parallel (Rp) threads and internal taper (Rc)
2
threads.
Key
1 Face marked
2 Face marked
3 Incomplete thread at each end of gauge shall be removed or chamfered (see 7.1.1.1)
4 Gauge plane
5 Optional clearance groove (see 7.1.1.1)
6 The middle of the step face shall cut the thread flank at the pitch diameter
7 Clearance diameter
8 Pitch diameter
Figure 1 — Taper full form threaded plug gauge (gauge No. 1)
The dimensions of this gauge are given in Table 2 and manufacturing tolerances are given in 7.1.1.2.
The gauge incorporates a step equal in length to the total tolerance T on the position of the gauge plane of the
2
internal thread specified in EN 10226-1 and prEN 10226-2. To allow for the chamfer on the internal thread, the step
is displaced by 0,5P relative to the gauge plane, such that the internally threaded workpiece can be verified with
reference to its face.
The large diameter end face of the gauge is marked '+' (positive) and the face of the tolerance step is marked '–'
(negative).
NOTE For sizes smaller than 1/2, the '+' and '–' markings may be omitted if not practicable.
7
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
Table 2 — Dimensions of taper full form threaded plug gauge (gauge No. 1)
Dimensions in millimetres
Diameters at gauge plane
Designation Pitch Major Pitch Minor Overall Length Length of Width of Height
of thread length of from end tolerance clearance of step
gauge face to the step groove
gauge
plane
P d, D d , D d , D l l l b c
2 2 1 1 0 1 2 1
max.
1 2 3 4 5 6 7 8 9 10
1/16 0,907 7,723 7,142 6,561 5,6 1,588 2,268 0,3 1,8
1/8
0,907 9,728 9,147 8,566 5,6 1,588 2,268 0,3 1,8
1/4 1,337 13,157 12,301 11,445 8,4 2,339 3,342 0,4 2,4
3/8 1,337 16,662 15,806 14,950 8,8 2,339 3,342 0,4 2,4
1/2 1,814 20,955 19,793 18,631 11,4 3,175 4,536 0,5 3,3
3/4 1,814 26,441 25,279 24,117 12,7 3,175 4,536 0,5 4,5
1
2,309 33,249 31,770 30,291 14,5 4,041 5,773 0,6 5,8
1 1/4 2,309 41,910 40,431 38,952 14,5 4,041 5,773 0,6 5,8
1 1/2
2,309 47,803 46,324 44,845 14,5 4,041 5,773 0,6 5,8
2 2,309 59,614 58,135 56,656 15 4,041 5,773 0,6 5,8
2 1/2 2,309 75,184 73,705 72,226 17,5 4,618 6,927 0,6 6,9
3 2,309 87,884 86,405 84,926 18,5 4,618 6,927 0,6 6,9
4 2,309 113,030 111,551 110,072 20 4,618 6,927 0,6 6,9
5
2,309 138,430 136,951 135,472 24 4,618 6,927 0,6 10
6 2,309 163,830 162,351 160,872 24 4,618 6,927 0,6 10
NOTE The values given in columns 3, 4 and 5 are basic values intended for the calculation of diameters at the gauge
plane in accordance with 7.1.1.
5.2.2 Taper full form threaded plug gauge with relief (gauge No. 2)
This gauge is a 1:16 taper full form threaded plug gauge with relief of threads (see Figure 2) and is suitable for
checking the major diameter (D) and pitch diameter (D ) at the gauge plane, and the accommodation length (see
2
Figure 3) of internal parallel (Rp) threads and internal taper (Rc) threads.
8
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
Key
1 Face marked
2 Face marked
3 Incomplete thread at each end of gauge shall be removed or chamfered (see 7.1.1.1)
4 Gauge plane
5 Optional clearance groove (see 7.1.1.1)
6 The middle of the step face shall cut the thread flank at the pitch diameter
7 Clearance diameter
8 Pitch diameter
Figure 2 — Taper full form threaded plug gauge with relief (gauge No. 2)
Key
1 Without free run-out
2 Washout thread
3 Complete thread
4 Accommodation length
5 With free run-out
NOTE Figure 3 is applicable to internal parallel (Rp) threads and internal taper (Rc) threads.
Figure 3 — Accommodation length
The dimensions of this gauge are given in Table 3 and manufacturing tolerances are given in 7.1.1.2.
9
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
The gauge incorporates a step equal in length to the total tolerance T on the position of the gauge plane of the
2
internal thread specified in EN 10226-1 and prEN 10226-2. To allow for the chamfer on the internal thread, the step
is displaced by 0,5P relative to the gauge plane, such that the internally threaded workpiece can be checked with
reference to its face. On sizes 1/4 and larger, a thread relief is provided part way along the gauge, thereby reducing
the number of threads and consequential friction in contact with the internally threaded workpiece.
The overall length (l ) of the gauge is equal to the length of useful thread for maximum gauge length plus 0,5P.
6
The large diameter end face of the gauge is marked '+' (positive) and the face of the tolerance step is marked '–'
(negative).
NOTE For sizes smaller than 1/2, the '+' and '–' markings may be omitted if not practicable.
Table 3 — Dimensions of taper full form threaded plug gauge with relief (gauge No. 2)
Dimensions in millimetres
Diameters at gauge plane
Desig- Pitch Major Pitch Minor Length Length of Overall Width of Length from Width of Height of
nation from end tolerance Length of relief relief to clearance step
of thread face to step gauge large end of groove
the gauge gauge
plane
P d, D d , D d , D l l l l l b c
2 2 1 1 1 2 6 7 8 1
max.
1 2 3 4 5 6 7 8 9 10 11 12
1/16 0,907 7,723 7,142 6,561 1,588 2,268 7,823 — — 0,3 1,8
1/8 0,907 9,728 9,147 8,566 1,588 2,268 7,823 — — 0,3 1,8
1/4 1,337 13,157 12,301 11,445 2,339 3,342 11,699 2,3 5,3 0,4 2,4
3/8 1,337 16,662 15,806 14,950 2,339 3,342 12,033 2,7 5,3 0,4 2,4
1/2
1,814 20,955 19,793 18,631 3,175 4,536 15,872 3,2 7,3 0,5 3,3
3/4 1,814 26,441 25,279 24,117 3,175 4,536 17,233 4,5 7,3 0,5 4,5
1 2,309 33,249 31,770 30,291 4,041 5,773 20,204 4,1 9,2 0,6 5,8
1 1/4 2,309 41,910 40,431 38,952 4,041 5,773 22,513 6,4 9,2 0,6 5,8
1 1/2 2,309 47,803 46,324 44,845 4,041 5,773 22,513 6,4 9,2 0,6 5,8
2
2,309 59,614 58,135 56,656 4,041 5,773 26,842 10,7 9,2 0,6 5,8
2 1/2 2,309 75,184 73,705 72,226 4,618 6,927 31,316 14 10,4 0,6 6,9
3
2,309 87,884 86,405 84,926 4,618 6,927 34,491 17,1 10,4 0,6 6,9
4 2,309 113,030 111,551 110,072 4,618 6,927 40,407 23,1 10,4 0,6 6,9
5 2,309 138,430 136,951 135,472 4,618 6,927 44,737 27,4 10,4 0,6 10
6 2,309 163,830 162,351 160,872 4,618 6,927 44,737 27,4 10,4 0,6 10
NOTE The values given in columns 3, 4 and 5 are basic values intended for the calculation of diameters at the gauge
plane in accordance with 7.1.1.
10
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
5.3 Parallel full form threaded ring gauge (gauge No. 3)
This gauge is a parallel full form threaded ring gauge (see Figure 4) and is suitable for checking the minor diameter
(d ) and pitch diameter (d ) at the gauge plane of taper external (R) threads.
1 2
Key
1 Face marked
2 Face marked
3 Gauge plane
4 Incomplete thread at each end of gauge shall be removed or chamfered (see 7.1.1.1)
5 Optional clearance groove (see 7.1.1.1)
6 Clearance diameter
Figure 4 — Parallel full form threaded ring gauge (gauge No. 3)
The dimensions of this gauge are given in Table 4 and manufacturing tolerances are given in 7.1.1.2.
The gauge incorporates a step equal to the total tolerance T on gauge length, specified in EN 10226-1 and
1
prEN 10226-2. The step is situated between minimum and maximum gauge lengths measured from the gauge
plane and is counterbored for the diameter D to a depth l .
4 5
The gauge plane is located at the face of the gauge, opposite to the step.
The overall length (l ) of the gauge corresponds to the maximum gauge length.
3
The outer and inner faces of the tolerance step shall be marked '+' (positive) and '–' (negative) respectively.
NOTE These signs indicate the maximum and minimum gauge lengths, respectively the corresponding minimum and
maximum allowable diameters of the external thread.
11
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
Table 4 — Dimensions of parallel full form threaded ring gauge (gauge No. 3)
Dimensions in millimetres
Diameters at gauge plane
Designation Pitch Major Pitch Minor Width of Diameter of Overall Length of Depth of
of thread clearance counter- length of tolerance counter-
groove bore gauge step bore
P D, d D , d D , d b D l l l
2 2 1 1 1 4 3 4 5
max.
1 2 3 4 5 6 7 8 9 10
1/16 0,907 7,723 7,142 6,561 0,3 9,5 4,876 1,814 2
1/8
0,907 9,728 9,147 8,566 0,3 11,5 4,876 1,814 2
1/4 1,337 13,157 12,301 11,445 0,4 15,5 7,353 2,674 3
3/8 1,337 16,662 15,806 14,950 0,4 19 7,687 2,674 3,2
1/2 1,814 20,955 19,793 18,631 0,5 23,5 9,979 3,628 4,1
3/4 1,814 26,441 25,279 24,117 0,5 29 11,339 3,628 4,6
1
2,309 33,249 31,770 30,291 0,6 36 12,700 4,618 5,3
1 1/4 2,309 41,910 40,431 38,952 0,6 44,5 15,009 4,618 6,4
1 1/2
2,309 47,803 46,324 44,845 0,6 50,5 15,009 4,618 6,4
2 2,309 59,614 58,135 56,656 0,6 62 18,184 4,618 8
2 1/2 2,309 75,184 73,705 72,226 0,6 77,5 20,926 6,927 9,2
3 2,309 87,884 86,405 84,926 0,6 90,5 24,101 6,927 10,4
4 2,309 113,030 111,551 110,072 0,6 115,5 28,864 6,927 12,8
5
2,309 138,430 136,951 135,472 0,6 141 32,039 6,927 14,4
6 2,309 163,830 162,351 160,872 0,6 166,5 32,039 6,927 14,4
NOTE The values given in columns 3, 4 and 5 are basic values intended for the calculation of diameters at the gauge
plane in accordance with 7.1.1.
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
5.4 Taper plain ring gauge (gauge No. 4)
This gauge is a 1:16 taper plain ring gauge (see Figure 5) and is suitable for checking the major diameter (d) and
the related useful thread length on taper external (R) threads.
Key
1 Face marked
2 Face marked
3 Gauge plane
Figure 5 — Taper plain ring gauge (gauge No. 4)
The dimensions of this gauge are given in Table 5 and manufacturing tolerances are given in 7.1.2.
The gauge incorporates a step equal in length to the total tolerance (T ) on gauge length, specified in EN 10226-1
1
and prEN 10226-2. The step is situated between minimum and maximum gauge lengths measured from the gauge
plane.
The overall length (l ) of the gauge corresponds to the length of useful thread for maximum gauge length.
9
The small diameter end face of the gauge is marked '+' (positive) and the face of the tolerance step is marked '–'
(negative).
NOTE These signs indicate the maximum and minimum gauge lengths, respectively the corresponding minimum and
maximum allowable major diameters of the external thread.
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
Table 5 — Dimensions of taper plain ring gauge (gauge No. 4)
Dimensions in millimetres
Designation of Diameter at Diameter of Length from Length of Overall length Depth of
thread gauge plane counterbore gauge plane tolerance step of gauge counterbore
to small end
of gauge
d D l l l l
4 3 4 9 10
1 2 3 4 5 6 7
1/16
7,723 9,5 4,876 1,814 7,369 2,3
1/8 9,728 11,5 4,876 1,814 7,369 2,3
1/4
13,157 15,5 7,353 2,674 11,030 3,3
3/8 16,662 19 7,687 2,674 11,364 3,3
1/2 20,955 23,5 9,979 3,628 14,965 4,5
3/4 26,441 29 11,339 3,628 16,326 4,5
1 33,249 36 12,700 4,618 19,049 5,8
1 1/4
41,910 44,5 15,009 4,618 21,358 5,8
1 1/2 47,803 50,5 15,009 4,618 21,358 5,8
2 59,614 62 18,184 4,618 25,688 5,8
2 1/2 75,184 77,5 20,926 6,927 30,161 8,1
3 87,884 90,5 24,101 6,927 33,336 8,1
4
113,030 115,5 28,864 6,927 39,253 8,1
5 138,430 141 32,039 6,927 43,582 8,1
6
163,830 166,5 32,039 6,927 43,582 8,1
NOTE The values given in column 2 are basic values intended for the calculation of diameters at the gauge plane in
accordance with 7.1.2.
5.5 Taper modified thread form check plug gauge (gauge No. 5)
This check plug gauge (see Figure 6) is used to check the dimensions of the parallel threaded ring gauge (gauge
No. 3) when manufacturing the ring gauge and for checking the ring gauge for wear.
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
Key
1 Gauge plane
2 Incomplete thread at each end of gauge shall be removed or chamfered (see 7.1.3.1)
3 Clearance groove
4 Clearance diameter
5 Pitch diameter
6 The middle of the step face shall cut the thread flank at the pitch diameter
7 Truncated crest
8 Pitch diameter
Figure 6 — Taper modified thread form check plug gauge (gauge No. 5)
The gauge is designed on the basis of the taper threaded plug gauge (gauge No. 1). The tolerance step has been
retained, but with respect to the gauge plane it is positioned entirely in the plus tolerance zone.
The threads of the check plug gauge are truncated at the crests and provided with a clearance groove at the root of
the thread in order to ensure the pitch diameters engage when gauging is carried out.
The dimensions of this check plug gauge are given in Table 6.
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SIST EN 10226-3:2005
EN 10226-3:2005 (E)
Table 6 — Dimensions of taper modified thread form check plug gauge (gauge No. 5)
Dimensions in millimetres
Diameters at gauge plane
Desig- Pitch Major Pitch Minor Width of Height of Overall Length of Radial
nation of clearance step length tolerance distance from
thread groove of gauge step pitch diameter
to truncated crest
P d, D d , D d , D b c l l F
2 2 1 1 2 0 2
1 2 3 4 5 6 7 8 9 10
1/16 0,907 7,723 7,142 6,561 0,3 1,8 5,6 2,268 0,145
1/8 0,907 9,728 9,147 8,566 0,3 1,8 5,6 2,268 0,145
1/4 1,337 13,157 12,301 11,445 0,4 2,4 8,4 3,342 0,214
3/8 1,337 16,662 15,806 14,950 0,4 2,4 8,8 3,342 0,214
1/2 1,814 20,955 19,793 18,631 0,5 3,3 11,4 4,536 0,290
3/4 1,814 26,441 25,279 24,117 0,5 4,5 12,7 4,536 0,290
1 2,309 33,249 31,770 30,291 0,8 5,8 14,5 5,773 0,369
1 1/4 2,309 41,910 40,431 38,952 0,8 5,8 14,5 5,773 0,369
1 1/2 2,309 47,803 46,324 44,845 0,8 5,8 14,5 5,773 0,369
2 2,309 59,614 58,135 56,656 0,8 5,8 15 5,773 0,369
2 1/2 2,309 75,184 73,705 72,226 0,8 6,9 17,5 6,927 0,369
3 2,309 87,884 86,405 84,926 0,8 6,9 18,5 6,927 0,369
4 2,309 113,030 111,551 110,072 0,8 6,9 20 6,927 0,369
5 2,309 138,430 136,951 135,472 0,8 10 24 6,927 0,369
6 2,309 163,830 162,351 160,872 0,8 10 24 6,927 0,369
NOTE The values given in columns 3, 4 and 5 are basic values intended for the calculation
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