EN ISO 8434-1:1997
(Main)Metallic tube connections for fluid power and general use - Part 1: 24° compression fittings (ISO 8434-1:1994)
Metallic tube connections for fluid power and general use - Part 1: 24° compression fittings (ISO 8434-1:1994)
Metallische Rohrverschraubungen für Fluidtechnik und allgemeine Anwendung - Teil 1: 24°-Schneidringverschraubung (ISO 8434-1:1994)
Dieser Teil der ISO 8434 legt allgemeine und maßliche Anforderungen an die Ausführung und Funktionsfähigkeit von 24 ° Schneidringverschraubungen fest, d die für die Verwendung mit Stahlrohren und Rohren aus Nichteisenmetallen mit einem Außendurchmesser von 4 mm bis einschließlich 42 mm geeignet sind. Diese Rohrverschraubungen sind für hydraulische oder pneumatische Kraftübertragungen und allgemeine Anwendungen in dem in diesem Teil der ISO 8434 festgelegten Temperatur- und Druckbereich vorgesehen.
Raccords de tubes métalliques pour transmissions hydrauliques et pneumatiques et applications générales - Partie 1: Raccords à compression à 24 (ISO 8434-1:1994)
Kovinski cevni priključki za fluidno tehniko in za splošno uporabo - 1. del: 24° z zareznim obročkom (ISO 8434-1:1994)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 8434-1:2001
01-november-2001
.RYLQVNLFHYQLSULNOMXþNL]DIOXLGQRWHKQLNRLQ]DVSORãQRXSRUDERGHO ƒ]
]DUH]QLPREURþNRP ,62
Metallic tube connections for fluid power and general use - Part 1: 24° compression
fittings (ISO 8434-1:1994)
Metallische Rohrverschraubungen für Fluidtechnik und allgemeine Anwendung - Teil 1:
24°-Schneidringverschraubung (ISO 8434-1:1994)
Raccords de tubes métalliques pour transmissions hydrauliques et pneumatiques et
applications générales - Partie 1: Raccords a compression a 24 (ISO 8434-1:1994)
Ta slovenski standard je istoveten z: EN ISO 8434-1:1997
ICS:
23.100.40 Cevna napeljava in sklopke Piping and couplings
SIST EN ISO 8434-1:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN ISO 8434-1:2001
---------------------- Page: 2 ----------------------
SIST EN ISO 8434-1:2001
---------------------- Page: 3 ----------------------
SIST EN ISO 8434-1:2001
---------------------- Page: 4 ----------------------
SIST EN ISO 8434-1:2001
---------------------- Page: 5 ----------------------
SIST EN ISO 8434-1:2001
---------------------- Page: 6 ----------------------
SIST EN ISO 8434-1:2001
INTERNATIONAL
STANDARD
First edition
1994-05-15
Metallic tube connections for fluid power
and general use -
Part 1:
24” compression fittings
Ratcords de tubes m&alliques pour transmissions hydrauliques et
Pneuma tiques et applica tions g&&ales -
Partie 1: Ratcords 3 compression A 24”
Reference number
ISO 8434-1:1994(E)
---------------------- Page: 7 ----------------------
SIST EN ISO 8434-1:2001
ISO 843491:1994(E)
Contents
Page
1
1 Scope .
1
2 Normative references .
2
3 Definitions .
3
4 Requirements for materials .
3
5 Pressure/temperature requirements .
5
Designation of fittings .
6
6
............................................................
7 Requirements for tubes
6
............................................................
8 Across-flats dimensions
6
.......................................................................................
9 Design
......................................................................... 7
10 Screw threads
7
11 Manufacture .
............................................................... 7
12 Assembly instruction
8
13 Procurement information .
8
14 Marking of components .
8
Identification Statement (Reference to this part of ISO 8434)
15
.
Annexes
A Port and stud end pressure ratings and combination of tube outside
26
diameter and thread size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Bibliography
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii
---------------------- Page: 8 ----------------------
SIST EN ISO 8434-1:2001
Q ISO ISO 8434=1:1994(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. Esch 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 Iiaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) 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 ISO 8434-1 was prepared jointly by Technical
Committees ISO/TC 5, Ferrous metal pipes and metalic fittings and
lSO/TC 131, Fluid power Systems, Subcommittee SC 4, Connectors and
similar products and components.
This first edition, together with ISO 8432-2, cancels and replaces
ISO 8434:1986, which has been technically revised.
ISO 8434 consists of the following Parts, under the general title Metallic
tube connections for fluid power and general use:
- Part 7: 24 degree compression fittings
- Part 2: 37 degree flared fittings
- Part 3: O-ring face seal fittings
- Part 4: 24 degree cone connectors with O-ring weld-on nipples
- Part 5: Test methods for threaded hydraulic fluid power connectors
Annex A forms an integral part of this part of ISO 8434. Annex B is for
information only.
---------------------- Page: 9 ----------------------
SIST EN ISO 8434-1:2001
ISO 8434=1:1994(E) Q ISO
Introduction
In fluid power Systems, power is transmitted and controlled through a fluid
(liquid or gas) under pressure within an enclosed circuit. In general appli-
cations, a fluid may be conveyed under pressure. Components may be
connected through their ports by connections (fittings), tubes and hoses.
Tubes are rigid conductors; hoses are flexible conductors.
---------------------- Page: 10 ----------------------
SIST EN ISO 8434-1:2001
INTERNATIONAL STANDARD 0 ISO ISO 8434=1:1994(E)
Metallic tube connections for fluid power and general
use -
Part 1:
24” compression fittings
to revision, and Parties to agreements based on this
1 Scope
part of ISO 8434 are encouraged to investigate the
possibility of applying the most recent editions of the
This part of ISO 8434 specifies general and dimen-
Standards indicated below. Members of IEC and ISO
sional requirements for the design and performante
maintain registers of currently valid International
of 24” compression fittings which are suitable for use
Standards.
with ferrous and non-ferrous tubes with outside di-
ameters from 4 mm to 42 mm, inclusive. These fit-
ISO 228-1: 1994, Pipe threads where pressure-tight
tings are for use in fluid power and general
joints are not made on the threads - Part 7: Dimen-
applications within the limits of pressure and temper-
sions, tolerantes and designa tion.
ature specified in this part of ISO 8434.
They are intended for the connection of plain end ISO 261:-‘1, ISO general-purpose metric screw
tubes and hose fittings to ports in accordance with threads - General plan.
ISO 6149-1, ISO 1179-1 and ISO 9974-1.
ISO 27411975, Copper tubes of circular section - D[-
NOTES
mensions.
1 For new designs in hydraulic fluid power applications,
ISO 286-2: 1988, ISO System of limits and fits -
see the requirements given in 9.6.
Part 2: Tables of Standard tolerante grades and limit
deviations for holes and shafts.
2 For use under conditions outside the pressure and/or
temperature limits specified, see 5.4.
ISO 1127: 1992, Stainless steel tubes - Dimensions,
tolerantes and conventional masses per unit length.
2 Normative references
ISO 1179-1:
-*) Connections for general use and fluid
The following Standards contain provisions which, power -
Ports ’and stud ends with ISO 228-7 threads
through reference in this text, constitute provisions with elastomeric or metal-to-metal sealing - Part 7:
of this part of ISO 8434. At the time of publication, the Threaded ports.
editions indicated were valid. All Standards are subject
1) To be published. (Revision of ISO 261:1973)
2) To be published.
---------------------- Page: 11 ----------------------
SIST EN ISO 8434-1:2001
0 ISO
ISO 8434=1:1994(E)
I
ISO 1179-2: -*) , Connections for general use and fluid with elastomeric or metal-to-metal sealing - Part 1:
power - Potts and stud ends with ISO 228-1 threads
Threaded ports.
with elastomeric or metal-to-metal sealing - Part 2:
-*)
Heavy-duty (S series) and light-duty (L series) stud I so 9974-2: Connections for general use and fluid
ends with elastomeric sealing (type E). power - Parts and stud ends with ISO 261 threads
with elastomeric or metal-to-metal sealing - Part 2:
ISO 1179-3: -2) Connections for general use and fluid Stud ends with elastomeric sealing (type E).
power - Ports ’and stud ends with ISO 228-1 threads
ISO 9974-3: -*) Connections for general use and fluid
with elas tomeric or metal-to-metal sealing - Part 3:
power - Po& and stud ends with ISO 261 threads
Light-duty (L series) stud ends with sealing by O-ring
with elastomeric or metal-to-metal sealing - Part 3:
with retaining ring (types G and H).
Stud ends with metal-to-metal sealing (type B).
ISO 1179-4:
-*) Connections for general use and fluid
power - Ports ’and stud ends with ISO 228-1 threads
3 Definitions
with elastomeric or metal-to-metal sealing - Part 4:
Stud ends for general use only with metal-to-metal
For the purposes of this part of ISO 8434, the defi-
sealing (type B).
nitions given in ISO 5598 and the following definitions
aPPlY l
ISO 3304: 1905, Plain end seamless precision steel
tubes - Technical conditions for delivery.
3.1 fluid power: Means whereby energy is trans-
mitted, controlled and distributed using a pressurized
ISO 3305:1985, Plain end welded precision steel
fluid as the medium.
tubes - Technical conditions for delivery.
[ISO 55981
ISO 4759-1 :1970, Tolerantes for fasteners - Part 1:
Bolts, screws and nuts with thread diameters be- 3.2 connection; fitting: Leakproof device to con-
tween 1,6 (inclusive) and 150 mm (inclusive) and
nett pipelines (conductors) to one another, or to
product grades A, B and C. equipment.
ISO 5598:1985, Fluid power Systems and compo- 3.3 fastening thread: Terminal thread of a complete
nents - Vocabulary. fitting.
ISO 6149-1 :1993, Connections for fluid power and 3.4 run: Two principal, axially aligned outlets of a tee
general use - Ports and stud ends with ISO 261 or Cross.
threads and O-ring sealing - Part 1: Ports with O-ring
3.5 branch: Side outlet(s) of a tee or Cross.
seal in truncated housing.
3.6 chamfer: Removal of a conical portion at the
ISO 6149-211993, Connections for fluid power and
entrance of a thread to assist assembly and prevent
general use - Ports and stud ends with ISO 261
darnage to the statt of the thread.
threads and O-ring sealing - Part 2: Heavy-duty (S
series) stud ends - Dimensions, design, tes t meth-
3.7 face-to-face dimension: Distance between the
ods and requiremen ts.
two parallel faces of axially aligned outlets of a fitting.
ISO 6149-311993, Connections for fluid power and
3.8 face-to-centre dimension: Distance from the
general use - Potts and stud ends with ISO 261
face of an outlet to the central axis of an angularly
threads and O-ring sealing - Part 3: Light-duty (L
disposed outlet.
series) stud ends - Dimensions, design, tes t me th-
ods and requirements.
3.9 assembly torque: The torque to be applied in
Order to achieve a satisfactoty final assembly.
ISO 9227:1990, Corrosion tests in artificial atmos-
pheres - Salt spra y tests.
3.10 working pressure: Pressure at which the ap-
paratus is being operated in a given application.
ISO 9974-1: -2) Connections for general use and fluid
power - Parts and stud ends with ISO 261 threads
[ISO 5598-9
---------------------- Page: 12 ----------------------
SIST EN ISO 8434-1:2001
Q ISO
ISO 8434=1:1994(E)
5 Pressureltemperature requirements
4 Requirements for materials
Figure 1 Shows the Cross-section and component
Parts of a typical 24” compression fitting.
5.1 Fittings made of carbon steel complying with
this part of ISO 8434 shall be suitable for use at the
working pressures given in table 1 when used at fluid
Compr ession ring
temperatures between - 20 “C and + 120 “C.
?
Nut
Body
5.2 Fittings made of stainless steel complying with
7
this patt of ISO 8434 shall be suitable for use at the
working pressures given in table 1 when used at
temperatures between - 60 “C and + 200 “C. See
table2 for pressure deratings of fittings made from
stainless steel and used at temperatures of + 50 “C
and hig her.
5.3 Copper alloy fittings shall be suitable for use at
i
Tube
the working pressures given in table 1 when used at
temperatures between - 40 “C and + 175 “C.
Figure 1 - Cross-section of a typical
compression fitting
5.4 For applications under conditions outside the
pressure and/or temperature limits given in table 1
and in 5.1 to 5.3, the manufacturer shall be consulted.
4.1 Fitting bodies
Bodies shall be manufactured from carbon steel,
5.5 According to different applications and different
stainless steels or topper alloys which will provide the
pressure ratings, there are three series of fittings. The
minimum requirements for the pressure/temperature
series are referred to as
ratings specified in clause 5. They shall have charac-
teristics which make them suitable for use with the
LL: extra-light duty
fluid to be conveyed and to provide an effective joint.
Weld fitting types shall be made of materials classi-
L: light duty
fied as suitable for welding.
S: heavy duty
4.2 Nuts
Ranges of the tube outside diameters and pressure
Nuts to be used with carbon steel bodies shall be
requirements are shown in table 1.
made of carbon steel and those for use with stainless
steel bodies shall be made of stainless steel, unless
otherwise specified. Nuts to be used with topper al-
5.6 The fitting assembly shall not leak or fail when
loy bodies shall be made of a material similar to the hydrostatically tested at four times the applicable
bodies.
recommended working pressure specified in table 1.
Testing shall be conducted at room temperature.
4.3 Compression rings
The material of compression rings shall be similar to 5.7 The pressure/temperature requirements given
that of the body and shall be selected by the manu- in table 1 and in 5.1 to 5.6 are for tube and hose con-
nections and fitting bodies only. For port and stud end
facturer to suit the design and method of manufac-
ture, unless otherwise specified. The ring material pressure/temperature requirements, the values spec-
shall be compatible with the fluid to be conveyed and ified in the respective port and stud end Standards and
provide an effective joint. in annex A of this part of ISO 8434 shall apply.
---------------------- Page: 13 ----------------------
SIST EN ISO 8434-1:2001
ISO 8434-1: 1994(E)
Table 1
- Working pressure ratings for 24” compression fittings
Tube outside
Series Working pressure
diameter
I
Carbon and stainless steel Copper alloy
mm MPa (bar ’)) MPa
(bar)
(63)
LL 4 to 8 incl. IO (100) 63
6 to 15 incl. 25 (250) 16 (160)
L 18 to 22 incl. 16 (160) IO (100)
28 to 42 incl. IO UOO) 63 (63)
6 to 12 incl. 63 (630) 40 (400)
16 to 25 incl. 40 (400) 25 (250)
S
30 to 38 incl. 25 (250) 16 (160)
NOTE - For higher pressure ratings and for dynamic conditions, the manufacturer shall be consulted.
=105N/m2= IO5 Pa = 0,l MPa
1) 1 bar
I I
Table 2 - Pressure deratings for fittings made from stainless steel and used at temperatures outside the
range given in 5.2
Working pressure for temperature range
- 35 “C to + 50 “C + 100 “C + 200 “C
MPa MPa MPa (bar)
(bar) (bar)
63 630) 56,l 50,4 (504)
(561)
40 (400) 35,6 32 WO)
(356)
31,5 28 25 (250)
(315) (280)
25 (250) 22,3 20 (200)
(223)
16 (160) 14,2 12,8 (128)
(142)
IO (100) 8 030)
89 (89)
NOTE - Intermediate values may be interpolated.
---------------------- Page: 14 ----------------------
SIST EN ISO 8434-1:2001
0 ISO ISO 8434=1:1994(E)
6.9 The following Ietter Symbols shall be used:
6 Designation of fittings
Connection end type Letter
6.1 Fittings shall be designated by an alphanumeric
BH
Bulkhead
code to facilitate ordering. They shall be designated
Swivel SW
by ISO 8434-1, followed by a spaced hyphen, then the
WD
Weld-on
fitting style letter Symbols (see 6.2), followed by a
BR
Braze-on
spaced hyphen, and, for the ends, the outside diam-
eter of the tube with which they are to be connected, Port P
preceded by a series letter (see 5.5). For stud ends
SD
Stud
(connector ends), a multiplication sign followed by the
RE
Reducing
thread designation of the stud end and the sealing
type shall be added.
Shape Letter
EXAMPLE
Straight S
Elbow E
A fitting with a heavy-duty stud connection end with
45” elbow E45
a G 3/8 A thread in accordance with ISO 1179-4 to be
connected to a 12 mm OD tube is designated as fol- T
Tee
lows:
RT
Run tee
Branch tee BT
ISO 8434-1 - SDS - SI2 x G 3/8 A, type B
K
Cross
6.2 The letter Symbol designation of the fitting style
Letter
Component type
shall have two Parts: the connection end type, im-
N
Nut
mediately followed by the shape of the fitting.
SL
Sleeve
CR
Cutting ring
6.3 Tube ends are assumed to be male and thus do
LN
Locknut
not need to be included in the Code. However, if an-
other type of end is involved, it shall be designated.
of compression fittings and des ignations
Examples
are given in figures 2 to 6.
6.4 Reducing fittings (figure2) and reducing elbows
(figure3) shall be designated by specifying the larger
tube end first.
6.5 Stud fittings (figure4) shall be designated by
specifying the tube end first, then the thread size for
the stud end.
6.6 For tee fittings (figures 5 and 6), the Order of
designation of the connection ends shall be from
larger to smaller on the run, followed by the branch
end.
6.7 For Cross fittings, the Order of designation of the
ISO 8434-1 - RES - S20 x S12
connection ends shall be from left to right, followed
by top to bottom, with the larger ends on the left and
Figure 2 - Reducing fitting
at the top.
6.8 If the fitting has a tube Union connection, it shall
be designated first, then the designation shall proceed
clockwise.
---------------------- Page: 15 ----------------------
SIST EN ISO 8434-1:2001
ISO 8434=1:1994(E)
ISO 8434-1 - REBT - L22 x L22 x L12
ISO 8434-1 - REE - S20 x SI2
Figure 6 - Reducing branch tee
Figure 3 - Reducing elbow
7 Requirements for tubes
Carbon steel tubes shall comply with delivery con-
dition R37 NBK as specified in ISO 3304 (cold-drawn
and normalized) or ISO 3305 (cold-drawn and normal-
ized). Stainless steel tubes shall comply with
ISO 1127 (annealed). Copper alloy tubes shall comply
with ISO 274 (as-drawn and half-hard).
ISO 8434-1 - SDS - S20 x G 3/4 A
8 Across-flats dimensions
Figure 4 - Stud fitting
8.1 The dimensions across flats for nuts and on the
bodies of the fittings shall be those given in tables 4
to 11 and tables 13 to 17. For sizes up to and includ-
ing 24 mm, tolerantes for across-flats dimensions
shall be & mm, and for sizes larger than 24 mm
mm.
they shall be -7
8.2 Hex tolerantes across flats shall be in accord-
ante with ISO 4759-1:1978, product grade C. Mini-
mum across-corner hex dimensions are 1,092 times
the width across flats. The minimum side flat is 0,43
times the nominal width across flats. Unless other-
wise specified or shown, hex corners shall be
chamfered 15” to 30” to a diameter equal to the width
across flats, with a tolerante of -i4 mm.
I
9 Design
ISO 8434-1 - RERT - L22 x t.12 x L22
9.1 Fittings
- Reducing run tee
Figure 5
The fittings shall conform to the requirements given
in figures 7 to 21 and tables 3 to 17. They shall be
designed so that resistance to flow is reduced to a
minimum.
---------------------- Page: 16 ----------------------
SIST EN ISO 8434-1:2001
0 ISO
ISO 8434=1:1994(E)
9.2 Dimensions chamfer shall be equal to the minor diameter of the
thread, with a tolerante of -E4 mm.
,
Dimensions specified apply to finished Parts, including
any plating or other treatments. The tolerante value
10.2 Stud ends (connection ends)
for all dimensions not otherwise limited shall be
+ 0,4 mm. The sealing seats of fittings shall be con-
-
The thread for stud ends (connection ends) of fittings
centric with straight thread pitch diameters within
shall be Chosen from ISO 228-1 (Class A) or ISO 261.
0,25 mm full indicator movement (FIM).
The dimensions of the stud ends shall comply with
the requirements given in tables 7 to 9.
9.3 Passage tolerantes
NOTE 3
Parallel threads require an undercut with a seal-
ing washer, O-ring or similar device to ensure a leakproof
Where passages in straight fittings are machined from
joint, unless the stud end undercut is designed for metal-
opposite ends, the offset at the meeting Point shall
to-metal sealing.
not exceed 0,4 mm. No Cross-sectional area at a
junction of passages shall be less than that of the
smallest passage.
11 Manufacture
9.4 Angular tolerantes
11.1 The fittings shall be free from defects such as
Cracks and porosity and shall be deburred. Sharp
Angular tolerantes on axis of ends of elbows, tees
edges shall be removed on the outside. All machined
and crosses shall be & 2,5” for fittings for tube sizes
surfaces shall have a surface roughness value of
10 mm and less, and + 1,5” for all larger sizes.
Ra< 6,3 Pm, except where otherwise noted in the
figures.
9.5 Contour details
11.2 Unless otherwise specified, carbon steel
Details of contour shall be Chosen by the manufac-
coupling bodies, rings and nuts shall be treated or
turer provided the dimensions given in tables 3 to 17
protected to prevent corrosion during storage. The
are maintained. Wrench flats on elbows and tees shall
extemal surface and threads on all fittings except
conform to the dimensions given in the relevant ta-
weld components shall be protected with an appro-
bles. Abrupt reduction of a section shall be avoided.
priate coating to pass a minimum 18-h salt Spray test
Junctions of small external sections and adjoining
in accordance with ISO 9227, unless otherwise
sections that are relatively heavy shall be blended by
agreed by the manufacturer and User. Any appearance
means of ample fillets.
of red rust during the salt Spray test shall be consid-
ered failure. Fluid passages shall be excluded from the
9.6 Ports and stud ends
plating or coating requirements but shall be protected
from rust. Weld components shall be protected from
These fittings are intended for the connection of plain
corrosion by an oil film or Phosphate coating.
end tubes and hose fittings to ports in accordance
with ISO 6149-1, ISO 1179-1 or ISO 9974-1. For new
11.3 Shaped fittings for tubes of outside diameters
designs in hydraulic fluid power applications, only
up to and including 12 mm may be machined from
ports and stud ends in accordance with the relevant
forgings or bars. Shaped fittings for tubes of outside
Parts of ISO 6149 shall be used. Potts and stud ends
diameter greater than 12 mm shall be made from
in accordance with the relevant Parts of ISO 1179 and
forgings.
ISO 9974 shall not be used for new designs in hy-
draulic fluid power applications.
11.4 Unless otherwise noted, all sharp corners shall
be broken to 0,15 mm max.
10 Screw threads
10.1 Compression ends 12 Assembly instruction
The screw threads on the compression ends of the The assembly of the fittings with the connecting
fittings shall be ISO metric in accordance with tubes shall be carried out without extemal loads.
ISO 261.
The manufacturer shall draw up assembly instructions
Threads shall be chamfered at the face of the coupling for the use of the fittings. These instructions shall in-
to an included angle of 45 ”. The diameter of the clude at least the following:
---------------------- Page: 17 ----------------------
SIST EN ISO 8434-1:2001
ISO 8434=1:1994(E)
- details relating to the material and quality of suit-
- working pressure;
able tubes;
- working temperature.
- details concerning the preparation of the selected
tube;
14 Marking of components
- instructions regarding the assembly of the coup-
Fitting bodies, compression rings and nuts shall be
ling, such as the number of wrenching turns or
permanently marked with the manufacturer ’s name,
assembly torque;
trademark or code identifier, unless otherwise agreed
- recommendations
regarding the tools to be used by the user and manufacturer. Nuts shall also be
for assembly. marked with the fitting size and series.
13 Procurement information
15 Identification Statement (Reference to
The following information should be supplied by the this part of ISO 8434)
purchaser when making an inquiry or placing an Order:
Use the following Statement in test reports, cata-
logues and sales Iiterature when electing to comply
- description of fitting;
with this part of ISO 8434:
- material of fitting;
“Dimensions and design for 24” compression metallic
fittings in accordance with ISO 8434-1 :1994, Metallic
- material and size of tube;
tube connections for fluid power and general use -
- fluid to be conveyed; Part 1: 24 degree compression fittings. It
Surface roughness in micrometres
0
m
“0
ti
0
z
:I
a
C
H
NOTE - Interface is as Chosen by the manufacturer.
Figure 7 -
Compression end and ring details
---------------------- Page: 18 ----------------------
SIST EN ISO 8434-1:2001
ISO 8434=1:1994(E)
Table 3 - Dimensions of compression end and ring
Dimensions in millimetres
a 2,
Series Tube ?- c 2)
4 G f5 43 41 4 g f
OD ’)
+0,3 +O,l +O,l 0 +0,3
f 02 0 BI 13) 0 0 max.
-0,2 0 z
4 M8xl 8 4 4 - 5
6,5 3,5 6,4 2 0,8 5,5
LL 5 MIO x 1 8 5,5 5 - 6,5 8,5 4 +l 0 8,4
2 0,8 6
6 MIO x 1 8 5,5
6 - 7,5 8,5 4 8,4 2 0,8 6
8 M12 XI
9 5,5 8 - 9,5 IO,5 4 IO,4 2 0,8 6
6 M12 x 1,5 10 7 6
- 8,l 10 5 +l 9,7 3 1 7,5
8 M14 x 1,5 10 7 8 - IO,1 12 5 0 11,7
3 1 7,5
10 M16 x 1,5 11 7 10
- 12,3 14 5 13,7 3 1 7,5
12 M18 x 1,5 11 7 12 - 14,3 16 5 +1,5 15,7
3 1 7,5
L 15 M22 x 1,5 12 7 15 - 17 ‘3 20 5 0
19,7 3 1 8
18 M26 x 1,5 12 7,5
18 - 20,3 24 5,5 23,7 3 1 85
22 M30x2 14 7,5 22 - 24,3 27 6 27
4 1,2 8,5
28
M35x2 14 7,5 28 - 30,3 33 6 +2 33 4 1,2 9
35 M45x2 16 IO,5 - 35,3 38 42 7
0 42 4 1,2 11
42
M52x2 16 11 - 42,3 45 49 7 49 4 1,2 11,5
6 M14 x 1,5 12 7 6 - 8,l 12 5 11,7 3 1
7,5
8
M16 x 1,5 12 7 8 - IO,1 14 5 13,7 3 1 7,5
10 M18 x 1,5 12 7,5 10 - 12,3
16 5 +1,5 0 15,7 3 1 85
12 M20 x 1,5 12 7,5 12 - 14,3 18 5 17,7
3 1 83
S 16
M24 x 1,5 14 8,5 16 - 18,3 22 5 Zl,7 3 1 9,5
20 M30x2 16 IO,5 20 - 22,9 27 6,5 27
4 1,2 11
25 M36x2 18 12 25 - 27,9 33 6,5 +2 33
4 1,2 12
30 M42 x2
20 13,5 30 - 33 39 7 0 39 4 1,2 13
38 M52x2 22 16 - 38,3 41 49 7,5 49
4 1,2 14,5
1) OD = outside diameter.
2) a and c are measured when fully tightened.
3) Tolerante as per ISO 286-2.
---------------------- Page: 19 ----------------------
SIST EN ISO 8434-1:2001
0 ISO
ISO 8434=1:1994(E)
Dimensions in millimetres
X
1 max? 1
h
r-
1) Internal chamfer angle.
2) Permitted for cold-formed nuts.
3) Alternative futlchamfer.
Figure 8 - Tube nuts (N)
Table 4
- Dimensions of tube nuts
Dimensions in millimetres
1)
Series Tube OD b h m l) S
d7 d2 *1 *2
4
+o, 1 +0,2 +0,2
BI1 min.
0 0
0
- 9,8 5 11 3,5 10 7,5 8
4 M8xl 4
-
11,8 5,5 11,5 3,5 12 7,8 85
LL 5 MlOxl 5
- 11,8 5,5 11,5 3,5 12 8,2 83
6 MlOx 1 6
M12 XI 8 - 13,8 6 12 3,5 14 8,7 9
8
14 10 IO,5
6 MlZx1,5 6 - 13,8 7 14,5 4
17 10 IO,5
8 M14x1,5 8 - 16,8 7 14,5 4
- l8,8 8 15,5 4 19 11 11,5
IO M16x1,5 10
Ml8x1,5 12 - Zl,8 8 15,5 5 22 11 11,5
12
M22x1,5 15 - 26,8 8,5 17 5 27 11,5 12,5
L 15
18 - 31,8 8,5 18 5 32 11,5 13
18 M26x1,5
22 M30x2 22 - 35,8 9,5 20 7 36 13,5 14,5
28 M36x2 28 - 40,8 10 21 7 41 74 15
17
35 M45x2 - 35,3 49,8 12 24 8 50 16
60 16 17
42 M52x2 - 42,3 59,6 12 24 8
1) d3 and m are for optional machining of shoulders.
10
---------------------- Page: 20 ----------------------
SIST EN ISO 8434-1:2001
ISO 8434=1:1994(E)
Figure 9 - Straight Union fitting (S)
Table 5 - Dimensions of straight Union fittings
Dimensions in millimetres
Series Tube OD d L S l
10
ref.
* 0,3
3 20 9 12
20 11 9
3,5
LL
20 11 9
4,5
12 12
6 23
6 4 24 12 10
25 14 11
8 6
10 8 27 17 13
12 28 14
10 19
15 30 24 16
12
L
18 15 31 27 16
22 19 35 32 20
28 24 36 41 21
35 41 46 20
30
42 36 43 55 21
6 4 30 14 16
8 5 32 17 18
17
10 7 32 19
12 8 34 22 19
S
16 12 38 27 21
44
20 16 32 23
25 20 50 41 26
30 25 54 46 27
38 32 61 55 29
11
---------------------- Page: 21 ----------------------
SIST EN ISO 8434-1:2001
ISO 8434=1:1994(E)
L
1
Y-i
b--l
Fittings machined from barstock
Elbow (E), tee (T) and Cross (K) Union fittings (see table6)
Figure 10 -
12
---------------------- Page: 22 ----------------------
SIST EN ISO 8434-1:2001
ISO 843491:1994( E)
Table 6 Dimensions of elbow, tee and Cross Union fittings
Dimensions in millimetres
.
14 L
Series Tube OD S 1
dl0
Fitting machined
min. Forged f itting
zk 013 ref.
from barstock
4 3 6 15 9
9 11
LL
5 3,5 6 15 9 11
95
6 4,5 6 15 9 11
93
8
6 7 17 12 12
11,5
6 4 7 19 12
12 12
8 6 7 21 12
14 14
10 8 8 22 14
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.