|
Ref. No.: ISO/R 49 1957 (E)
IS0
I NTERN AT1 ON A L ORGAN lZATl O N FOR STAN DA R D I ZATlO N
IS0 RECOMMENDATION
R 49
MALLEABLE CAST IRON PIPE FITTINGS
SCREWED IN ACCORDANCE WITH IS0 RECOMMENDATION R 7
lS' 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.
---------------------- Page: 1 ----------------------
BRIEF HISTORY
This IS0 Recommendation R 49, Malleable Ctrsf Iron Pipe Fittings, Screwed
in accordance with IS0 Recommendation li 7, was prepared by Technical Com-
ISO/ TC 5, Pipes and Fittings, the Secretariat of which is held by the
mittee
Association Suisse de Normalisation (SNV).
At its plenary meeting held in Milan, in April 1952, the ‘Technical Committee
assigned the study of the standardization of these fittings to its Sub-committee
IS0 1 TC 5 SC 5, Fittings (other than Cast Iron).
It was a question, in the first place, of making a choice among more than
two thousand types and sizes of fittings covered by national standards, the
proposals of the Member Bodies and the drafts of the former International
Federation of the National Standardizing Associations (ISA) and of retaining
those required For ordinary needs and manufactured in large quantity. During
its meetings of 1952, in London, and 1953, in Paris, the Sub-committee drew
up a list of 638 types and sizes of fittings.
The Sub-committee thereafter studied the “centre-to-face”, “face-to-
face” and “centre-to-centre” dimensions, comparing these with the dimensions
specified by the national standards of various countries and by the ISA drafts.
During its 1954 meetings, in Brussels and Zurich, it defined these dimensions
and their tolerances.
On the basis of the proposals of thc Sub-committee, the ISO/ TC 5 Secre-
tariat put forward a first draft proposal which the Technical Committee examined
1955 plenary meeting, in Stockholm. After having decided upon the
during its
principle of corresponding and equally acceptable values €or the inch and metric
systems, provided that these values, in each case, permit practicable inter-
changeability, the Technical Committee adopted the draft proposal as a Draft
IS0 Recommendation.
The sizes of threads of Union nuts (see last column of table 4.21, page 3i)
have been included because the dimensions of the gaskets are dependent on those
threads. As these threads are not intended to make pressure-tight joints on
the threads and have not yet been standardized, they have therefore been
included, for the time being, for guidance only.
Submitted on 31 December 1955 to all the IS0 Member Bodies, this
Draft IS0 Recommendation was approved, subject to some amendments, by
the following 27 Member Bodies (out of a total of 37):
*Austria *Greece Portugal
Belgium Hungary Romania
Bulgaria *Ireland Spain
Chile Israel Sweden
Italy Switzerland
Czechoslovakia
Denmark Japan Turkey
Finland Mexico United Kingdom
France Netherlands U.S.S.R.
Germany Poland Yugoslavia
No Member Body opposed the approval of the Draft.
At its meeting in July 1957, the IS0 Council decided to accept the Draft
IS0 Recommendation as an IS0 RECOMMENDATION.
* These Member Bodies stated that they had no objection to the Draft being approved.
-2-
.
---------------------- Page: 2 ----------------------
ISO/R 49 - 1957 (E)
IS0 Recommendation R 49 July 1957
MALLEABLE CAST IRON PIPE FITTINGS
SCREWED IN ACCORDANCE WITH IS0 RECOMMENDATION R 7
1. SCOPE
This Recommendation covers 638 malleable cast iron pipe fittings which are
considered necessary for general use and which are being mass produced. It
defines the types of fittings covered and specifies the dimensions which arc
necessary for interchangeability (centre-to-face, face-to-face and centre-to-centre
dimensions) as well as their tolerances.
2. GENERAL
ILLUSTRATIONS
2.1
Illustrations used throughout this document are diagrammatical, e.g. the
from of reinforcement and the design of the female ends shown have been
arbitrarily chosen without prejudice.
2.2 REIN FORCEMENT
‘The fittings may be either plain
or reinforced.
Two typical forms of reinforcement
are shown in figure 1.
FIGURE 1
2.3 FEMALES ENDS
Two typical forms of female ends
are shown in figure 2. Either form
may be used for fitting code num-
hers DI, D.2, El, E2, G1, G1/4.5”,
G3, G4/4.i0 and Kbl.
FIGIJRE 2
2.4 THREADS
The outlets are threaded to the dimensions specified in IS0 Recommen-
dation R 7, Pipe Threads for Gas List Tubes and Scremed Fiffings, where
Pressnre-Tight Joints are mnde on the Threads (118 inch to 6 inches).
2.5 DIMENSIONS
A11 the dimensions recommended enable the fittings to be assembled with
IS0 Recommendation R 7.
tubes screwed in accordance with
The dimensions in inches and in millimetres given in the tables are con-
sidered to be “Corresponciing values”, although some of them are not
exact equivalents. In all cases, however, the dimensions ensure prac-
ticable interchangeability.
The differences be tween these corresponding values do not exceed :
0.04 inch (corresponding value : 1 millimetre)
or 50 per cent of the tolerances indicated in clause 2.6.1.
-3-
---------------------- Page: 3 ----------------------
ISO/R 49 - 1957 (E)
2.6 TOLERANCES
2.6.1 Where maximum or minimum dimensions are not specified, the
tolerances for centre-to-face*, face-to-face** and centre-to-centre***
dimensions are as follows:
I
ilmenslons Tolerances
above up to and including
in
mm mm I in in
-
k 1.5 I 5 0.06
30 ~ Il/,,
30 50 ’ 2
k 2.0 ~ f 0.08
50
* 2.5 I 5 0.10
75 I 3
75 100 4
* 3.0 i 0.12
100
150 1 6 5 3.5 0.14
150
200 1 8 i 4.0 i 0.16
- -
I
200
i- 5.0 ’ * 0.20
* Centre-to-face dimensions apply to elbows, bends, tees, crosses, etc.
** Face-to-face dimensions apply to sockets, nipples, etc.
*** Centre-to-centre dimensions apply to return bends.
2.6.2 As regards the tolerance for the alignment of threads, the axes of
the screw threads are coincident with the theoretical axes of the
fittings within 1/2” on the run and on the branches.
2.6.3 Thread tolerances are in accordance with those specified in IS0
Recommendation R 7.
2.7 DESIGNATION OF FITTINGS
To facilitate easy translations into the languages of the various countries,
the fittings covered by this Recommendation are designated by the follow-
ing particulars and in the sequence shown:
(a) Type of fitting . see clause 2.7.1
(b) Size . see clause 2.7.2
(c) Right- and left-hand thread, where applicable see clause 2.7.3
(d) Code number . see clause 2.7.4
2.7.1 Type of fitting (elbow, bend, tee, cross, etc.).
It should be noted that the following terms are omitted when
reference is made to type of fitting:
- the indication “90”” for elbows, bends and tees of 90”;
- the word “equal” for fittings with all outlets of the same size;
- the word “female” for fittings with female-threaded outlets only ;
- the word “male”, where it is obvious that the fittings have only
male thread.
by “elbow”, “bend”,
The type of fitting is therefore denoted
“tee”, “cross”, etc.
2.7.2 Size. This is determined by the nominal sizes of the pipe thread
at the outlets.
EQUAL FITTINGS, where all outlets are of the same size, are referred
by that one size, irrespective of the number of outlets.
to
I
-4-
t
---------------------- Page: 4 ----------------------
ISO/R 49 - 1857 (E)
UNEQUAL FITTINGS are referred to by the size of each outlet, the
sequence of specifying being dependent upon the number of outlets
as follows:
Unequal fittings having fwo outlets are specified by their outlets
given in decreasing order (large outlet - small outlet). See figure 3:
2 2
1 1
1
FIGURE 3
Unequal fittings (reducing or increasing) having more than tiuo outlets
are specified by either of the two methods shown respectively in
figures 4 and 5:
Method “a” of specifying outlets
used in most countries where the metrie system is applied
3
J
3 3
TJ 2
4%92
1 1
1
FIGURE 4
Method “b” of specifying outlets
used in most countries where the inch system is applied
2.7.3 Right- and left-hand thread. For sockets and hexagon nipples,
with right- and left-hand thread, the letters “R-L” (Right-Left)
are added after the size of the fitting.
2.7.1 Code number. See Indexes, pages 6, 7 and 8.
2.7.5 Examples of designations :
= Elbow 2, Al
2 inch equal female elbow
= Bend 11/,, D4
inch equal male and female bend
1 inch equal socket, threaded right- and left-hand = Socket 1 R-L, M2
Reducing female tee, in which the sizes on the run
are 1 inch and l/% inch and the outlet is inch:
= Tee 1 x */( x l/*, B 1
Method “a” of specifying outlets
= Tee 1 x l/, x *I,, B 1
Method “b” of specifying outlets
-5-
t
---------------------- Page: 5 ----------------------
ISO/R 49 - 1957 (E)
Al A1145' A4 A4145'
A
Elbows
@- @ 0 @=- hlp
@
I
Page 11
Page 9 Page 10 Page 11 Page 9 Page 10
B
Tees
Page O Page 12 Page 17 Page 14 Page 14 Page 14
c1
C
.@
Crosses
Page 18
Page 0
D4
D1
D
Bends
F
Page 17 Page 17
E2
El
E
Pitcher Tees
p
Twin Elbows
Page 17 Page 19
Page 18 Page 18 Page 18
Page 17
G8
G
Long Sweep
Bends
r
Page 20
Kb 1
Kb
Return
Bends
Page 22
I
-6-
t
---------------------- Page: 6 ----------------------
3. INDEX OF CODE NUMBERS (concluded)
M2 M3 M4
@am@ Page B 24
Page 23 Page 23 Page 23 Page 24
N8
N4
@
Page 25 Page25 I Page 26 Page26 I
Page 25
P4
1
Page 21
~~
T9 111
T8
Tl T2
&
Page 28 Page 28
Page 28 Page 28
Page 28
~
U 12
U1 U2 U11
Page 29 Page 29
Page 29 Page 29
UA11
UA1 UA2
@
Pago 90
Page 30 Page 30
Za 2
Za 1
I
Page 9
Page 9
t
---------------------- Page: 7 ----------------------
ISO/R 49 - 1957 (E)
4. DIMENSIONS OF FITTINGS
INDEX
Page
Page
4.1 Elbows Al 4.12 Return bends Kbl . . . . , . . . 22
hlalc and female elbows A4
Tees B1
4.13 Sockets M2
Crosses CI
Sockets, right- and left-hand threads
Side outlet clbows Zal
M2 R-L
Side outlet tees Za2 . . . . . . . . 0
Sockets, reducing M2
Eccentric sockets, reducing M3 . . . 23
4.2 Elbows, reducing Al
Male and female elbows, reducing A4 10
4.14 Male and female sockets M4
Male and female sockets, reducing M4
24
4.3 45' elbows Al/45"
45" male and female elbows A4/45" . 11
4.15
Bushings N4 . . . . . . . . . . . 25
4.4 Tees, reducing or increasing on the
branch B1 . . . . . . . . . . 12-13 4.16 Hexagon nipples NE
Hexagon nipples, right- and left-hand
threads N8 R-L
4.5 Tees, reducing on the run:
Hexagon nipples, reducing NE . . . 26
reducing on the branch BI
equal on the branch BI
4.11 Backnuts P4 . . . . . . . . . . . 27
increasing on the branch BI . . 14-15
4.6 Crosses, reducing C1. . . . . . . . 16 4.18 Hexagon caps T1
Round caps T2
Plain plugs TE
4.7 Bends DI
Beaded plugs T9
Male and female bends D4
Countersunk plugs T11 . . . . . , 28
Pitcher tees El
Twin rlbows E2 . . . . . . , . . 17
4.19 Unions, flat seat U1
Male and female Unions, flat seat U2
4.8 Pitcher tees:
Unions, taper seat U 11
reducing on the branch El
Male and female Unions, taper
reducing on the run El
seat U12 . . . . . . . . . . . . 20
reducing on branch and run El . . 18
4.9 Twin elbows, reducing E2 . . . . . 19
4.20 Union elbows, flat seat UA1
Male and female Union elbows, flat
seat UA2
4.10 Long sweep bends G1
UA11
Union elbows, taper seat
Male and female long sweep bends 64
Male and female Union elbows, taper
Male long sweep bends GE . . . . . 20
seat UA12 . . . . . . . . , . . 30
4.11 45" long sweep bends 61/45"
45" male and female long sweep bends 4.21 Gaskets for Unions and Union elbows,
G4/45" . . . . . . . . . . . . 21 flat seat U1, U2, UA1 and UA2 . . 31
-8-
---------------------- Page: 8 ----------------------
ISO/R 49 - 1957 (E)
4.1 ELBOWS Al MALE AND FEMALE ELBOWS A4 SIDE OUTLET ELBOWS Zal
TEES Bi CROSSES Cl SIDE OUTLET TEES Za2
Al A4 Za 1 Za 2
c1
~~
Dimensions
Sizes
(Corresponding values)
inches
mlllimet res inches
-__ __
Al A4
B1 Ci Zal a
n b b
-
19 25 0.75 1 .O0
'Is 'Is
21 28 0.81 1.14
'14 '14
25 32 0.95 1.30
"8 3is
28 37 1.12 1.50
'I2 'I2
33 43 1.31 1.73
3i4 31,
1
1 38 52 1.50 2.10
45 60 1.55 2.41
1 '11 1 lI4
50 65 1.94 2.61
1 '12
1 'I2
2 2
58 74 2.25 2.96
69 88 2.70 3.52
2 '12 2 'la
3
3 78 98 3.08 3.92
87 108 3.42 4.32
3 '12 3 'I2
4 4 96 118 3.79 4.72
- -
5 5
115 4.50
- -
6 6
131 5.13
-
Dimensions which are not specified are left to the discretion of the manufacturer.
Tolerances: see clause 2.6.
Thread: in accordance with IS0 Recommendation R 7.
-9-
t
---------------------- Page: 9 ----------------------
ISO/R 49 - 1957 (E)
4.2 ELBOWS, REDUCING Al
MALE AND FEMALE ELBOWS. REDUCING A4
A4
AI
Dhenslons
Slzes
(Corresponding values)
inches millimetres I inches
AI A4 a b C a b C
-
23 0.88 0.90
23
26 1.04 1.03
26 1.34
-
28 1.13
28 1.12
30 31 1.20 1.22 1.61
-
32 34 1.26 1.36
35 36 1.37 1.45 1.85
-
36 41 1.45 1.62
40 42 1.58 1.67 2.25
-
42 1.65 1.80
46
-
46 48 1.82 1.88
-
2.16
2 x 1 'I2 52 55 2.02
-
2 'I2 x 2 61 66 2.39 2.60
Dimensions which are not specified are left to the discretion of the manufacturer.
Tolerances: see clause 2.6.
Thread: in accordance with IS0 Recommendation R 7.
- 10 -
t
---------------------- Page: 10 ----------------------
ISO/R Is - 1957 (E)
45' ELBOWS Al/&'
4.3
45' MALE AND FEMALE ELBOWS A414.5"
A 1/45' A 4/45'
U
Dimensions
Sizes
(Corresponding values)
millimetres I inches
inches
All45" A4/45O U b U b
~
20 25 0.80 1.00
28 0.88 1.12
22
32 0.98 1.26
25
1.12 1.45
28 37
1.29 1.67
33 43
1.81
36 46 1.43
43 55 1.68 2.14
Dimensions which are not specified are left to the discretion of the manufacturer.
Tolerances: see clause 2.6.
Thread: in accordance with IS0 Recommendation R 7.
- 11 -
t
---------------------- Page: 11 ----------------------
ISO/R 48 - 1857 (E)
4.4 TEES, REDUCING OR INCREASING ON THE BRANCH
B1
Dlmenslons
Slzes
(Corresponding values)
inches
millimetres I inches
__ __
__ __
Method "a"
a b a b
1 2 3
- - -
1.88
23 23 0.90
26 26 1.03 1.04
24 24 1.97 0.98
26 26 1.04 1.03
31 30 1.22 1.20
34 32 1.36 1.26
26 27 1.05 1 .O8
28 28 1.12
1.13
30 31 1.20 1.22
36 35 1.45 1.37
41 36 1.62 1.45
1 x '1, x 1
1 x 28 31 1.11 1.22
1 x '1,
1 x x 1
1 x 30 32 1.18 1.27
1 x 3iIs
1 x '12 x 1 1 x 32 34 1.26 1.36
1 x '12
1 x 31, x 1
1 X 1 X 35 36 1.37 1.45
1 x 111, x 1 1 x 42 40 1.67 1.58
1 x 1'1,
1 x 1'12 x 1 1 x 46 42
1 x l'la 1.80 1.65
Dimensions which are not specifled are left to the discretion of the manufacturer.
Tolerances: see clause 2.6.
Thread: in accordance with IS0 Recommendation R 7.
Method of specifying outlets: see clause 2.7.2.
---------------------- Page: 12 ----------------------
ISO/R 48 - 1957 (E)
4.4 TEES, REDUCING OR INCREASING ON THE BRANCH 51 (concluded)
Dimensions
Sizes
(Corresponding values)
inches millimetres inches
- -. ~ ~ ~
Melhod "a"
a b a
b
1 2 3
- - - -
32 36 1.26 1.44
34 38 1.34 1.53
36 41 1.45 1.62
40 42 1.58 1.67
48 46 1.88 1.82
54 48 2.10 1.90
36 42 1.41 1.66
1 'I2 x 'I2 x 1 'la
38 44 1.52 1.75
1 x si4 x 1 va
1 'I2 42 46 1.65 1.80
x 1 x 1 'I2
46 48 1.82 1.88
1 '12 x 1 'Id x 1
55 52 2.16 2.02
1 'la x 2 x 1 'I2
2 x 'I2 x 2 2 x 2 x 'I2 38 48 1.49 1.88
2 x x 2 2 x 2 x 314 40
50 1.60 1.97
2xlx2 2X2X1
44 52 1.73 2.02
2 x 1'/* x 2 2 x 2 x 1'1, 48 54 1.90 2.10
2 x Il/, x 2 2 x 2 x 1'l2 52 55 2.02 2.16
47 60 1.87 2.37
2 '12 x 2 'I2 x 1
52 62 2.04 2.45
2 'I2 x 2 'I2 x 1 'I4
55 63 2.16
...