Title missing - Legacy paper document

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Status
Withdrawn
Publication Date
31-Dec-1956
Current Stage
9599 - Withdrawal of International Standard
Completion Date
01-Jan-1962
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Standardization document
ISO/R 50:1957 - Title missing - Legacy paper document Released:1/1/1957
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Standardization document
ISO/R 50:1957 - Title missing - Legacy paper document Released:1/1/1957
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Standards Content (Sample)

UDC 62l.843.4
Ref. No.: ISO/R 50 - 1957 (E)
IS0
RDl ZATl O N
INTERN AT ONAL ORGANIZATION FOR ST DA
-:
IS0 RECOMMENDATION
R 50
STEEL SOCKETS
SCREWED IN ACCORDANCE WITH IS0 RECOMMENDATION R 7
MINIMUM LENGTHS
lSt EDITION
July 1957
\_-
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
t

---------------------- Page: 1 ----------------------
BRIEF HISTORY
The IS0 Recommendation R 50, Steel Sockets, Screwed in accordance with
IS0 Recommendation R 7 - Minimum Lengths, was prepared by Technical
Committee ISO/TC 5, Pipes and Fittings, the Secretariat of which is held by
the Association Suisse de Normalisation (SNV).
At its second plenary meeting held in Milan, in April 1952, the Tech-
nical Committee assigned the study of steel sockets to its Sub-Committee
ISO/TC 5/SC 5, Fittings (other than Cast Iron). At the meeting of the Sub-
committee in London, in September 1952, consideration was given to the
of the minimum lengths of corresponding steel sockets and
standardization
malleable cast iron sockets in conformity with the formula:
a = 2L + np
where L = length of useful thread on n = number of turns
pipe end in accordance with of thread
IS0 Recommendation R 7 p = pitch of thread
As however the views were very divergent, the Sub-Committee decided in Paris,
in September 1953, to deal separately with steel sockets and malleable cast
iron sockets.
The whole question was re-examined in Brussels, in May 1954, at the request
of the French Member Body, which proposed a value of n (number of turns of
thread) = 2. This proposal was adopted by a working group of the Sub-
Committee which met in Zurich, in July 1954, and was thereafter confirmed
by correspondence by all the members of the Sub-Committee. Following a
...

CDU 621.643.4 RBf. NO: ISO/R 50 - 1957 (F)
IS0
ORGAN I SAT1 ON I N T ERN AT I O NA L E DE NORM A LI SAT I ON
RECO M MAN DATION I SO
R 50
MANCHONS EN ACIER
FILETES SELON LA RECOMMANDATION ISO/R 7
LONGUEURS MINIMA
iBre EDITION
Juillet 1 957
---
REPRODUCTION INTERDITE
Le droit de reproduction des Recommandations IS0 et des Normes
IS0 est la propriete des ComitCs Membres de 1’ISO. En consb
quence, dans chaque pays, la reproduction de ces documents ne
peut être autoriske que par l’organisation nationale de normali-
sation de ce pays, membre de 1’ISO.
Seules les normes nationales sont valables dans leurs pays respectifs.
Imprime en Suisse
Ce document est Bgalement edit6 en anglais et en russe. I1 peut etre obtenu aupr-; des organ--ations
nationales de normalisation.
t

---------------------- Page: 1 ----------------------
HISTORIQUE
La Recommandation ISO/R 50, Manchons en acier, filetés selon la
Recommandafion ISO/R 7 - Longueurs minima, a été élaborée par le Comité
Technique ISO/TC 5, Tuyauteries et raccords, dont le Secrétariat est assumé
par l’Association Suisse de Normalisation (SNV).
Lors de sa deuxième réunion plénière, tenue A Milan, en avril 1952, le
Cornit6 Technique confia l’étude des manchons en acier A son Sous-Comit6
ISO/TC 5/SC 5, Raccords (autres que pour fuyauz en fonte). A sa réunion de
Londres, en septembre 1952, le Sous-Comité envisagea de normaliser la longueur
minimum des manchons correspondants en acier et en fonte malléable confor-
mément à la formule:
a=Z+np
où L = longueur du filetage utile du tube, n = nombre de pas
selon la Recommandation ISO/R 7
p = pas du filetage
Comme cependant les avis étaient fort divergents, le Sous-Comité décida A
Paris, en septembre 1953, d’étudier séparément les manchons en acier et les
manchons en fonte malléable.
La question fut réexaminée A Bruxelles, en mai 1954, A la demande du Comité
Membre de la France qui proposa pour n (nombre de pas) la valeur 2. Cette
proposition fut adoptée par le groupe de travail du Sous-Comité A sa réunion
A Zurich, en juillet 1954, puis confirmée par correspondance par tous les membres
du Sous-Comité. Après une dernière mise au point effectuée par le Sous-Co
...

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