ISO 228-1:1994

Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation

Filetages de tuyauterie pour raccordement sans étanchéité dans le filet — Partie 1: Dimensions, tolérances et désignation

Cevni navoji. pri katerih tesnjenje ni izvedeno z navojem - 1. del: Mere, tolerance in označevanje

General Information

• Status: Withdrawn
• Publication Date: 11-May-1994
• Withdrawal Date: 11-May-1994
• ICS: 21.040.30 - Special screw threads
• Technical Committee: ISO/TC 5/SC 5 - Threaded fittings, solder fittings, welding fittings, pipe threads, thread gauges
• Drafting Committee: ISO/TC 5/SC 5 - Threaded fittings, solder fittings, welding fittings, pipe threads, thread gauges
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 21-Sep-2000
• Ref Project: SIST ISO 228-1:1995 - Pipe threads where pressure-tight joints are not made on the threads -- Part 1: Dimensions, tolerances and designation

Relations

• Revises: ISO 228-1:1982 - Pipe threads where pressure-tight joints are not made on the threads — Part 1: Designation, dimensions and tolerances
• Effective Date: 15-Apr-2008
• Revised: ISO 228-1:2000 - Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances and designation
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL
IS0
STANDARD 228-l
Third edition
1994-05-15
Pipe threads where pressure-tight joints
are not made on the threads -
Part 1:
Dimensions, tolerances and designation
Filetages de tuyauterie pour raccordement sans 6tanch6it6 dans le
filet -
Partie 1: Dimensions, tolkances et d&ignation
Reference number
IS0 228-1: 1994(E)

---------------------- Page: 1 ----------------------
IS0 228=1:1994(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(I EC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 228-l was prepared by Technical Committee
ISO/TC 5, Ferrous metal pipes and metallic fittings, Subcommittee SC 5,
Threaded or plain end butt-welding fittings, threads, gauging of threads.
This third edition cancels and replaces the second edition
(IS0 228-l :I 982), which has been technically revised.
IS0 228 consists of the following parts, under the general title Pipe
threads where pressure-tight joints are not made on the threads:
- Part I: Dimensions, tolerances and designation
- Part 2: Verification by means of limit gauges
Annex A of this part of IS0 228 is for information only.
0 IS0 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardiza tion
Case Postale 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland
ii

---------------------- Page: 2 ----------------------
IS0 228=1:1994(E)
INTERNATIONAL STANDARD * IS0
Pipe threads where pressure-tight joints are not made
on the threads -
Part 1:
Dimensions, tolerances and designation
maintain registers of currently valid International
1 Scope
Standards.
This part of IS0 228 specifies the requirements for
IS0 7-l :I 994, Pipe threads where pressure-tight
thread form, dimensions, tolerances and designation
joints are made on the threads - Part I: Dimensions,
for fastening pipe threads, thread sizes l/16 to 6 in-
tolerances and designation.
clusive. Both internal and external threads are parallel
threads and intended for the mechanical assembly of
the component parts of fittings, cocks and valves,
3 Symbols
accessories, etc.
These threads are not suitable as jointing threads
G Pipe thread where pressure-tight joints are not
where a pressure-tight joint is made on the thread. If made on the threads
assemblies with such threads must be made
A Tighter class of tolerance of external pipe
pressure-tight, this should be effected by compress-
threads where pressure-tight joints are not
ing two tightening surfaces outside the threads, and
made on the threads
by interposing an appropriate seal.
B Wider class of tolerance of external pipe threads
NOTES
where pressure-tight joints are not made on the
1 For pipe threads where pressure-tight joints are made
threads
on the threads, see IS0 7-l.
H Height of the triangle of the thread profile
2 IS0 228-2 gives details of methods of verification of
fastening thread dimensions and form, and recommended
h Height of the thread profile with rounded crests
gauging systems.
and roots
r Radius of rounded crests and roots
P Pitch
2 Normative reference
D = d; major diameter of the internal thread
The following standard contains provisions which,
through reference in this text, constitute provisions
= D - 1,280 654 P = d,; minor diameter of the
D,
of this part of IS0 228. At the time of publication, the
internal thread
edition indicated was valid. All standards are subject
to revision, and parties to agreements based on this
= D - 0,640 327 P = dZ; pitch diameter of the
Dz
part of IS0 228 are encouraged to investigate the
internal thread
possibility of applying the most recent edition of the
standard indicated below. Members of IEC and IS0 d Major diameter of the external thread

---------------------- Page: 3 ----------------------
fJ3 IS0
IS0 228=1:1994(E)
Figure 1 shows fastening threads with full form pro-
= d - 1,280 654 P; minor diameter of the ex-
4
ternal thread files and their tolerances, figure 2 shows fastening
threads with truncated profiles and their tolerances.
= d - 0,640 327 P; pitch diameter of the ex-
d2
ternal thread
5 Designation
T
D1 Tolerance on the minor diameter of the internal
The designation of threads according to this part of
thread
IS0 228 shall consist of the following elements in the
sequence given:
T o2 Tolerance on the pitch diameter of the internal
thread
5.1 The description block shall be
...

SLOVENSKI STANDARD
SIST ISO 228-1:1995
01-november-1995
&HYQLQDYRMLSULNDWHULKWHVQMHQMHQLL]YHGHQR]QDYRMHPGHO0HUHWROHUDQFHLQ
R]QDþHYDQMH
Pipe threads where pressure-tight joints are not made on the threads -- Part 1:
Dimensions, tolerances and designation
Filetages de tuyauterie pour raccordement sans étanchéité dans le filet -- Partie 1:
Dimensions, tolérances et désignation
Ta slovenski standard je istoveten z: ISO 228-1:1994
ICS:
21.040.30 Posebni navoji Special screw threads
SIST ISO 228-1:1995 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST ISO 228-1:1995

---------------------- Page: 2 ----------------------

SIST ISO 228-1:1995
INTERNATIONAL
IS0
STANDARD 228-l
Third edition
1994-05-15
Pipe threads where pressure-tight joints
are not made on the threads -
Part 1:
Dimensions, tolerances and designation
Filetages de tuyauterie pour raccordement sans 6tanch6it6 dans le
filet -
Partie 1: Dimensions, tolkances et d&ignation
Reference number
IS0 228-1: 1994(E)

---------------------- Page: 3 ----------------------

SIST ISO 228-1:1995
IS0 228=1:1994(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(I EC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 228-l was prepared by Technical Committee
ISO/TC 5, Ferrous metal pipes and metallic fittings, Subcommittee SC 5,
Threaded or plain end butt-welding fittings, threads, gauging of threads.
This third edition cancels and replaces the second edition
(IS0 228-l :I 982), which has been technically revised.
IS0 228 consists of the following parts, under the general title Pipe
threads where pressure-tight joints are not made on the threads:
- Part I: Dimensions, tolerances and designation
- Part 2: Verification by means of limit gauges
Annex A of this part of IS0 228 is for information only.
0 IS0 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardiza tion
Case Postale 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland
ii

---------------------- Page: 4 ----------------------

SIST ISO 228-1:1995
IS0 228=1:1994(E)
INTERNATIONAL STANDARD * IS0
Pipe threads where pressure-tight joints are not made
on the threads -
Part 1:
Dimensions, tolerances and designation
maintain registers of currently valid International
1 Scope
Standards.
This part of IS0 228 specifies the requirements for
IS0 7-l :I 994, Pipe threads where pressure-tight
thread form, dimensions, tolerances and designation
joints are made on the threads - Part I: Dimensions,
for fastening pipe threads, thread sizes l/16 to 6 in-
tolerances and designation.
clusive. Both internal and external threads are parallel
threads and intended for the mechanical assembly of
the component parts of fittings, cocks and valves,
3 Symbols
accessories, etc.
These threads are not suitable as jointing threads
G Pipe thread where pressure-tight joints are not
where a pressure-tight joint is made on the thread. If made on the threads
assemblies with such threads must be made
A Tighter class of tolerance of external pipe
pressure-tight, this should be effected by compress-
threads where pressure-tight joints are not
ing two tightening surfaces outside the threads, and
made on the threads
by interposing an appropriate seal.
B Wider class of tolerance of external pipe threads
NOTES
where pressure-tight joints are not made on the
1 For pipe threads where pressure-tight joints are made
threads
on the threads, see IS0 7-l.
H Height of the triangle of the thread profile
2 IS0 228-2 gives details of methods of verification of
fastening thread dimensions and form, and recommended
h Height of the thread profile with rounded crests
gauging systems.
and roots
r Radius of rounded crests and roots
P Pitch
2 Normative reference
D = d; major diameter of the internal thread
The following standard contains provisions which,
through reference in this text, constitute provisions
= D - 1,280 654 P = d,; minor diameter of the
D,
of this part of IS0 228. At the time of publication, the
internal thread
edition indicated was valid. All standards are subject
to revision, and parties to agreements based on this
= D - 0,640 327 P = dZ; pitch diameter of the
Dz
part of IS0 228 are encouraged to investigate the
internal thread
possibility of applying the most recent edition of the
standard indicated below. Members of IEC and IS0 d Major diameter of the external thread

---------------------- Page: 5 ----------------------

SIST ISO 228-1:1995
fJ3 IS0
IS0 228=1:1994(E)
Figure 1 shows fastening threads with full form pro-
= d - 1,280 654 P;
...

NORME IS0
INTERNATIONALE 228-I
Troisibme bdition
1994454 5
Filetages de tuyauterie pour raccordement
sans Qtanchbitb dans le filet -
Partie 1:
Dimensions, tolbances et designation
Pipe threads where pressure-tight joints are not made on the threads -
Part I: Dimensions, tolerances and designation
Numbro de rhfbrence
IS0 228-1: 1994(F)

---------------------- Page: 1 ----------------------
IS0 228=1:1994(F)
Avant-propos
L ’ISO (Organisation intemationale de normalisation) est une federation
mondiale d ’organismes nationaux de normalisation (comites membres de
I’ISO). L ’elaboration des Normes intemationales est en general confiee aux
comites techniques de I’ISO. Chaque comite membre interesse par une
etude a le droit de faire partie du comite technique tree a cet effet. les
organisations internationales, gouvernementales et non gouvernemen-
tales, en liaison avec I’ISO participent egalement aux travaux. L ’ISO colla-
bore etroitement avec la Commission electrotechnique internationale (CEI)
en ce qui concerne la normalisation electrotechnique.
Les projets de Normes internationales adopt& par les comites techniques
sont soumis aux comites membres pour vote. Leur publication comme
Normes internationales requiert I’approbation de 75 % au moins des co-
mites membres votants.
La Norme internationale IS0 228-1 a ete elaboree par le comite technique
lSO/TC 5, Tuyauteries en m&aux ferreux et raccords m&alliques, sous-
comite SC 5, Raccords filet& ou 9 souder, filetages, calibres de
file tages.
Cette troisieme edition annule et remplace la deuxieme edition
(IS0 228-l :1982), dont elle constitue une revision technique.
L ’ISO 228 comprend les parties suivantes, presentees sous le titre general
Filetages de tuyauterie pour raccordement sans 6tanch6itk dans le filet:
- Partie 1: Dimensions, tokrances et dgsignation
- Partie 2: Wrification par calibres 9 limites
L ’annexe A de la presente partie de I’ISO 228 est donnee uniquement 8
titre d ’information.
0 IS0 1994
Droits de reproduction hen&. Sauf prescription differen&, aucune partie de cette publi-
cation ne peut Qtre reproduite ni utilis6e sous quelque forme que ce soit et par aucun pro-
&d& biectronique ou mbcanique, y compris la photocopie et ies microfilms, sans I ’accord
6crit de Mditeur.
Organisation internationale de normalisation
Case Postale 56 l CH-1211 Gen&ve 20 l Suisse
Imprim en Suisse
ii

---------------------- Page: 2 ----------------------
NORME INTERNATIONALE 0 IS0 IS0 228=1:1994(F)
Filetages de tuyauterie pour raccordement sans
6tanchBit6 dans le filet -
Partie 1:
Dimensions, tolbrances et dbsignation
cher la possibilite d ’appliquer l’edition la plus recente
1 Domaine d ’application
de la norme indiquee ci-apres. Les membres de la CEI
et de I’ISO possedent le registre des Normes inter-
La presente partie de I’ISO 228 prescrit les exigences
nationales en vigueur 8 un moment donne.
relatives 8 la forme, aux dimensions, aux tolerances
et 8 la designation d-es filetages de tuyauterie pour
IS0 7-l :1994, Filetages de tuyauterie pour raccor-
raccordement, de dimensions de filetage l/16 a 6
dement avec 6tanchbit8 dans le filet - Partie I: Di-
comprises. Les filetages interieurs comme les file-
mensions, tobances et d&igna tion.
tages exterieurs sont des filetages cylindriques qui
s ’appliquent aux assemblages mecaniques des pieces
de raccords, de robinetterie, d ’accessoires, etc.
3 Symboles
Ces filetages ne conviennent pas comme filetages
G Filetage de tuyauterie pour raccordement sans
avec etancheite dans le filet. Si des assemblages les
etancheite dans le filet
utilisant doivent etre rendus etanches, cela se fera par
le serrage de deux surfaces d ’etancheite en dehors
A Classe plus serree de tolerance du filetage ex-
du filetage, et en interposant un joint d ’etancheite
terieur de tuyauterie pour raccordement sans
approprie.
etancheite dans le filet
NOTES
B Classe plus large de tolerance du filetage exte-
rieur de tuyauterie pour raccordement sans
1 Pour les filetages de tuyauterie pour raccordement avec
etancheite dans le filet, voir IS0 7-l. etancheite dans le filet
2 L ’ISO 228-2 donne des precisions sur les methodes de
H Hauteur du triangle du profil du filetage
verification des dimensions et de la forme des filetages de
raccordement, et sur les systemes de calibrage recom- h Hauteur du profil du filetage entre sommets et
mandes.
fonds arrondis
r Rayon des arrondis au sommet et a fond de filet
2 Rbfhrence normative
P Pas
La norme suivante contient des dispositions qui, par
D = d; diametre exterieur du filetage interieur
suite de la reference qui en est faite, constituent des
dispositions valables pour la presente par-tie de I’ISO
= D - 1,280 654 P = d,; diametre interieur du
Dl
228. Au moment de la publication, l’edition indiquee
filetage interieur
etait en vigueur. Toute norme est sujette a revision
= D - 0,640 327 P = 4; diametre sur flancs du
et les parties prenantes des accords fond& sur la
filetage interieur
presente partie de I’ISO 228 sont invitees a recher-

---------------------- Page: 3 ----------------------
IS0 228=1:1994(F) 0 IS0
d Diametre exterieur du filetage exterieur interieur, si celui-ci est susceptible d ’etre associe avec
un filetage exterieur conforme 8 I’ISO 7-1. Dans un tel
= d - 1,280 654 P; diametre interieur du f iletage
4 cas, les longueurs de filetage doivent etre egales ou
exterieur
superieures 8 celles prescrites dans I’ISO 7-1.
du file-
= d - 0,640 327 P; diametre sur flancs
4 Les tolerances sur le diametre sur flancs du filetage
tage exterieur
interieur correspondent a I’ecart positif des tolerances
sur diametre dans I’ISO 7-1, 8 I’exception des tole-
T D1 Tolerance sur le diametre interieur du f iletage
rances des diametres pour les dimensions de filetage
interieur
l/6, l/8, l/4 et 3/8, pour lesquelles des valeurs le-
gerement superieures ont ete prescrites.
T 02 Tolerance sur le diametre sur flancs du f iletage
interieur
Pour les filetages exterieurs, deux classes de toleran-
ces sur le diametre sur flancs ont ete etablies (voir
Tolerance sur le diametre exterieur du f iletage
Td
tableau 1):
exterieur
Classe A (colonne 10): &art entierement negatif,
Td2 Tolerance sur le diametre sur flancs du filetage
egal 8 la valeur de tolerance sur le filetage inte-
exterieur
rieur.
4 Dimensions
Classe B (colonne 11): &art entierement negatif,
valeur double de celui de la classe A.
...