IEC 60154-1:2016

IEC 60154-1 ®
Edition 3.0 2016-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Flanges for waveguides –
Part 1: General requirements
Brides pour guides d'ondes –
Partie 1: Exigences générales
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IEC 60154-1 ®
Edition 3.0 2016-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Flanges for waveguides –
Part 1: General requirements
Brides pour guides d'ondes –
Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.120.10 ISBN 978-2-8322-3381-8

– 2 – IEC 60154-1:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 6
4 General . 6
4.1 Flange designation . 6
4.2 Standard atmospheric conditions for testing . 7
4.3 Visual inspection . 7
5 Mechanical requirements . 7
5.1 General requirements both for mounted and unmounted flanges . 7
5.1.1 Holes . 7
5.1.2 Shank diameter of bolts used for alignment . 7
5.1.3 Relation between shank or alignment pin and alignment hole diameters . 8
5.1.4 Overall dimensions and thickness of flanges . 8
5.1.5 Surface roughness of contact area of contact flanges . 9
5.1.6 Flatness of contact area . 9
5.1.7 Perpendicularity of the axis of the holes . 9
5.1.8 General requirements for mounted flanges (assemblies) . 9
5.2 Additional requirements for unmounted flanges . 9
5.2.1 General . 9
5.2.2 Shape of aperture . 9
5.2.3 Positioning of the holes . 10
5.2.4 Ordering information . 10

Table 1 – Shank diameters . 8

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FLANGES FOR WAVEGUIDES –
Part 1: General requirements
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60154-1 has been prepared by subcommittee 46F: RF and
microwave passive components, of IEC technical committee 46: Cables, wires, waveguides,
RF connectors, RF and microwave passive components and accessories.
This third edition cancels and replaces the second edition published in 1982. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) define the alignment pin and hole for waveguide alignment;
b) specify the dimensions in the metric system.

– 4 – IEC 60154-1:2016 © IEC 2016
The text of this standard is based on the following documents:
CDV Report on voting
46F/304/CDV 46F/318/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60154 series, published under the general title Flanges for
waveguides, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
This International Standard relates to straight hollow metallic tubing for use as waveguides in
electronic equipment. In recent years, the operation frequency of waveguide components and
systems has been extended to 1 THz and above. However, the IEC 60154 series of standards
for flanges for waveguides, currently specifies the interface design up to 40 GHz for
rectangular waveguides. In addition to this, the current issues of the IEC 60154 series of
standards were issued in the 1970’s and do not meet the needs of current applications. This
new edition of IEC 60154-1 addresses these two issues.

– 6 – IEC 60154-1:2016 © IEC 2016
FLANGES FOR WAVEGUIDES –
Part 1: General requirements
1 Scope
This part of IEC 60154 specifies the dimensions of waveguide flanges for use in electronic
equipment.
It covers requirements for flanges drilled before or after mounting on waveguides. It should be
noted that for optimum electrical performance, post-drilling of the alignment holes after
mounting is recommended.
The aim of this standard is to specify for waveguide flanges the mechanical requirements
necessary to ensure compatibility and, as far as practicable, interchangeability as well as to
ensure adequate electrical performance.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60050 (all parts), International Electrotechnical Vocabulary (available at
IEC 60068 (all parts), Environmental testing
IEC 60153 (all parts), Hollow metallic waveguides
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-726 apply.
4 General
4.1 Flange designation
Waveguide flanges covered by this standard shall be indicated by a reference number
comprising the following information:
a) the number of the present IEC publication (60154);
b) the letters “IEC";
c) a dash;
d) a letter relating to the basic construction of the flange style, i.e.:
P = a flange having a gasket groove but no choke groove (formerly called pressurizable);
C = a choke flange with a gasket groove (formerly called choke, pressurizable);

U = a flange having neither a gasket groove nor a choke groove (formerly called
unpressurizable );
e) a letter for the type according to the drawing. Flanges with the same letter and of the
same waveguide size can be mated;
f) the letter and number of the waveguide for which the flange is designed.
Example:
"60154 IEC-CBR 100" denotes a choke flange of type B for ordinary rectangular waveguide 60153 IEC-R 100.
4.2 Standard atmospheric conditions for testing
Unless otherwise specified, all tests shall be carried out under standard atmospheric
conditions for testing as specified in IEC 60068.
Before the measurements are made, the flanges shall be stored at the measuring temperature
for a time sufficient to allow the entire waveguide to reach this temperature.
When measurements are made at a temperature other than the specified temperature, the
results shall, where necessary, be corrected to the specified temperature. The ambient
temperature at which the measurements are made shall be stated in the test report.
4.3 Visual inspection
Waveguide flanges shall be uniform in composition. There shall be no burrs, cracks, die
marks, dirt, grease, scale nor splinters.
Contact surfaces shall have a clean appearance in accordance with good current practice.
Compliance is checked by visual inspection.
5 Mechanical requirements
5.1 General requirements both for mounted and unmounted flanges
5.1.1 Holes
Holes which are intended as alignment holes shall be precision drilled and clearly indicated
on the drawing.
Holes which are not intended for alignment, i.e. attachment holes, may be less accurately
located than are the alignment holes, but shall then be of correspondingly larger diameter to
ensure mating of the flanges (see 5.1.3).
5.1.2 Shank diameter of bolts used for alignment
The basic shank diameters are standardized, as given in Table 1:
___________
All flat flanges shall have this designation, including those that can be made pressure tight by using gaskets.

– 8 – IEC 60154-1:2016 © IEC 2016
Table 1 – Shank diameters
mm
8,0
6,35
5,0
4,17
4,0
3,0
The deviation on the basic shank diameter shall be according to ISO fit h8.
5.1.3 Relation between shank or alignment pin and alignment hole diameters
For each individual flange, the proper mating of two flanges is ensured by specifying:
a) the location and the basic diameters of the holes and the deviations thereon;
b) the basic diameters of the shanks of coupling bolts with the appropriate fit.
The basic diameter of the holes shall be the same as that of the corresponding bolt shank or
alignment pin.
The deviation on the hole diameter shall be specified for an ISO grade 9 fit for the alignment
holes and for the corresponding ISO grade 15 fit for the attachment holes.
The positional tolerance on the holes shall be specified using either the rectilinear or the
circular tolerancing method. Depending upon which method is used, the clearance between
) and the minimum hole diameter (D ) shall conform to
the maximum shank diameter (d
max min
one of the following (the inequality sign prevents the possibility of an interference fit):
Rectilinear tolerances:
D – d > (2√2)δ
min max
where
δ is the hole position tolerance in both directions;
D is the minimum hole diameter;
min
d is the maximum shank diameter.
max
NOTE The multiplication factor of √2 takes into account the displacement in two directions perpendicular to each
other.
Circular tolerances:
D – d > Z
min max
where
Z is the diameter of the circular tolerance zone.
5.1.4 Overall dimensions and thickness of flanges
The values quoted are taken from established designs and it should be noted that these
values are based in general on the use of brass, but for other materials other values might be
more appropriate.
...