SIST HD 129.6 S1:2004

SLOVENSKI STANDARD
01-januar-2004
[Not translated]
Flanges for waveguides - Part 6: Relevant specifications for flanges for medium flat
rectangular waveguides (IEC 60154-6:1983)
Flansche für Hohlleiter - Teil 6: Allgemeine Anforderungen für Flansche für mittelflache
Rechteck-Hohlleiter (IEC 60154-6:1983)
Brides pour guides d'ondes - Partie 6: Spécifications particulières de brides pour guides
d'ondes rectangulaires plats moyens (CEI 60154-6:1983)
Ta slovenski standard je istoveten z: HD 129.6 S1:1984
ICS:
23.040.60 Prirobnice, oglavki in spojni Flanges, couplings and joints
elementi
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
60154-6
INTERNATIONAL
Première édition
STAN
DARD
First edition
1983-01
Brides pour guides d'ondes
Sixième partie:
Spécifications particulières
de brides pour
guides d'ondes rectangulaires
plats moyens
Flanges for waveguides
Part 6:
Relevant specifications for flanges
for medium flat rectangular waveguides
© IEC 1983 Droits de reproduction réservés —
Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni
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including photocopying and microfilm, without permission in
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CODE PRIX
Commission Electrotechnique Internationale
L
PRICE CODE
International Electrotechnical Commission
IEC
MemnyHapoaHaa 3netsrporexwH4ecnaa HOMHCCHa
Pour prix, voir vigueur
catalogue en
• •
For price, see current catalogue

154-6 © IEC 1983 3
CONTENTS
Page
FOREWORD
PREFACE 5
Clause
1. General
1.1 Standardized types
-11
1.2 Flange designation
2. Mechanical requirements
2.1 Dimensions
2.2 General requirements for assemblies
2.3 Additional requirements for unmounted flanges
type L
Flange
154 IEC —ULM 12
154 IEC — ULM 14-32
154 IEC — ULM 40-100 18
Drawings — Figures 1 to 3
TABLE I
Flange type N
154 IEC — PNM 14-40
1541EC—PNM45
154 IEC — PNM 48-70 22
Drawings — Figures 4 to 6
TABLE II
154-6 © IEC 1983 5
INTERNATIONAL ELECTROTECHNICAL COMMISSION
FLANGES FOR WAVEGUIDES
Part 6: Relevant specifications for flanges for medium flat
rectangular waveguides
FOREWORD
1) The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on which all the
National Committees having a special interest therein are represented, express, as nearly as possible, an international
consensus of opinion on the subjects dealt with.
2) They have the form of recommendations for international use and they are accepted by the National Committees in that
sense.
3) In order to promote international unification, the IEC expresses the wish that all National Committees should adopt the text
of the IEC recommendation for their national rules in so far as national conditions will permit. Any divergence between the
IEC recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter.
4) The IEC has not laid down any procedure concerning marking as an indication of approval and has no responsibility when an
item of equipment is declared to comply with one of its recommendations.
PREFACE
This standard has been prepared by Sub-Committee 46B: Waveguides and their Accessories, of IEC
Technical Committee No.46: Cables, Wires and Waveguides for Telecommunication Equipment.
It forms the sixth part of I E C Publication 154 dealing with flanges for waveguides, and should be used in
conjunction with Part 1: General Requirements and Measuring Methods.
Relevant specifications for other types of flanges have been issued in separate publications.
The general outline of this standard was first discussed at the meeting held in Bucharest in 1974. As a result
of this meeting, a revised draft was discussed at the meeting held in Stockholm in 1976. As a result of this
meeting, a draft, Document 46B(Central Office)82, was submitted to the National Committees for approval
under the Six Months' Rule in May 1978.
The National Committees of the following countries voted explicitly in favour of publication:
Belgium Korea (Republic of)
Canada Poland
Egypt Sweden
France Switzerland
Germany Turkey
Italy United Kingdom
Some editorial comments were discussed and accepted at the meeting held in Dubrovnik in 1981.
The choice of material should be agreed upon between the purchaser and the manufacturer.

154-6 © IEC 1983
— 7 —
DIMENSIONAL DEVIATIONS
The values for the permissible deviations in this standard follow the principles given in ISO Recommendation R286, where:
Deviation is defined as:
algebraical difference between a size (actual, maximum, etc.) and the corresponding basic size.
Upper deviation is defined as:
algebraical difference between the maximum limit of size and the corresponding basic size.
And lower deviation is defined as:
algebraical difference between the minimum limit of size and the corresponding basic size.
It should be noted that the upper and lower deviations may have like signs, unlike signs or either deviation may be zero. This
permits the basic sizes of mating shafts and holes to be identical.
The older concept of plus tolerances and minus tolerances has an undesirable limitation, in that the basic sizes of mating shafts
and holes cannot be identical for clearance fits.
Other IEC publications quoted in this standard:
Publications Nos. 154-1: Flanges for Waveguides, Part 1: General Requirements.
153-6: Hollow Metallic Waveguides, Part 6: Relevant Specifications for Medium Flat Rectangular
Waveguides.
154-6 © IEC 1983
FLANGES FOR WAVEGUIDES
Part 6: Relevant specifications for flanges for medium flat
rectangular waveguides
Information on reflections
The reflections at the flange joint are of three kinds:
a) those caused by the allowed deviations on the internal dimensions of the waveguides;
b) those caused by lateral displacements of the two flange assemblies;
c) those caused by the chokes (in the following, these reflections are not taken into account).
When the deviations on the dimensions of the waveguides (according to IEC Publication 153-6: Hollow
Metallic Waveguides, Part 6: Relevant Specifications for Medium Flat Rectangular Waveguides) and of the
assemblies (according to this standard) sum up to cause maximum lateral displacement and maximum
changes of the waveguide internal dimensions, the theoretical maximum reflection may be calculated from:
reflection loss = 10 loglo dB
g Aa Abj 2 [4.9348 .1g (Aa 1 ) 2 2
7.8957 (Ab') 1
tA
+
4a3 + b a3 .lg b
where:
a = basic inside width of the waveguide
b = basic inside height of the waveguide
= waveguide wavelength
Aa and are the waveguide internal deviations
Ab
Aa' and Ab' are displacements of the waveguide axes
Notes I.— The first term within brackets represents the worst case reflection component at a flange joint caused by changes of
the waveguide internal dimensions.
2. — The second term within brackets represents the worst case reflection component at a flange joint caused by the
displacement of the two flange assemblies.
At the high end of the waveguide frequency band, the reflection component is maximum when the displacement exists
in the short wall direction only.
At the low end of the waveguide frequency band, the reflection component is maximum when the displacement exists
in the long wall direction only.
3. — The maximum reflection at the high end of the waveguide frequency band is smaller than the maximum reflection at
the low end of the band for the same magnitude of displacement.
4. — The "reflection loss" in decibels is given as a positive quantity.
The worst "reflection loss" in (positive) decibels
for waveguides M12 to MI00
M12 M14 to M100
Frequenceuences
(dB) (dB)
f = 1.25 fc
42.1 42.1 to 41.9
f = 1.50 L 44.8 44.8 to 44.2
f =
1.90 f 45.8 46.3 to 45.5
c
154-6 © IEC 1983 - 11 —
Clause No.
Item
1. General
1.1
Standardized types
The series of flanges for medium flat rectangular waveguides covered by this standard
are given in Tables I and II and Figures 1 to 6, pages 16 to 23.
1.2
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 (154).
b)
The letters "I E C".
c) A dash.
d) A letter relating to the basic construction of the flange, flange style, viz:
P = a flange having a gasket groove but no choke groove (formerly called
pressurizable).
U = a flange having neither a gasket groove nor a choke groove (formerly called
unpressurizable *).
e) A letter for the flange type according to the drawing.
f) The letter and number of the waveguide for which the flange is designed.
Example:
154 IEC – ULM 40 denotes L type flange without gasket groove for use
with medium flat rectangular waveguides 153 IEC – M40.
* All flat flanges shall have this designation.
2.
Mechanical requirements
2.1 Dimensions
2.1.1 Alignment holes
Holes which are intended as alignment holes are clearly indicated in the drawings and
shall be precision drilled. These alignment holes shall be those which are the nearest to
the narrow side of the waveguide.
Holes which are not intended as alignment holes may be less accurately located than are
the alignment holes, but shall be of correspondingly larger diameter to ensure mating of
the flanges.
2.1.2
Shank diameter of the bolts used for alignment
The basic values and deviations thereon are specified in Tables I and II.

154-6 © IEC 1983 — 13 —
Clause No. Item
2.1.3 Relation between shank and alignment hole diameters
For each individual flange, the proper mating of two flanges is ensured by specifying:
a) the location and basic diameters of the holes and the deviations thereon;
b) the basic diameters of the shanks of coupling bolts with the appropriate fit.
The recommended ISO fits are given in Tables I and II.
Note. — When
electrical requirements make it necessary, the hole position tolerance may be reduced
and the hole diameter fit improved accordingly.
2.1.4 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 different materials other values
might be more appropriate.
2.1.5 Surface roughness of contact area of flat flanges
For subsequent study.
2.1.6 Flatness of contact area
The flatness of contact area shall be better than the values given in the following table:
Requirement
Range of sizes
(mm) (in)
M12 For subsequent study
M14—M26 0.05 0.002
0.02
M32—M100 0.0008
2.1.7
Perpendicularity of the axis of the holes
The perpendicularity of the axis of the holes to the contact area of the flange shall be
90 ± i/a°.
2.2 General requirements for assemblies
2.2.1
Positioning of the holes
Positioning of the holes shall be based on the theoretical symmetry lines of the inside
cross-section of the wavéguide unless otherwise specified.

154-6 © I E C 1983 — 15 —
Clause No. Item
2.2.2 Perpendicularity of the contact area
The perpendicularity of the contact area of the flange to the axis of the waveguide shall
/a°
be 90 ± 1
2.3 Additional requirements for unmounted flanges
2.3.1
General
The drawings shown are for mounted flanges. In the individual drawings, one or more
methods are shown by way of example for the mounting of flanges to the waveguide.
This, however, does not exclude another method of mounting if the actual dimensions
permit.
Note. – For pre-drilled flanges the positioning of the holes should be based on the theoretical symmetry
lines of the flange aperture.
2.3.2 Shape of aperture
The requirements for the dimensions of the aperture in the flange only apply to that
part which effects mating between the flange and the waveguide.
The basic dimensions of the flange aperture shown in Tables I and II are equal to the
basic outside dimensions of the tubes according to IEC Publication 153-6.
The deviations for the dimensions of the aperture will depend on the materials and
assembly methods and shall, therefore, be determined by agreement between purchaser
and manufacturer.
2.3.3 Ordering information
When ordering unmounted flanges, an allowance should be made on certain of the
specified dimensions to cover the effects of possible machining after mounting.

— 16 — 154-6 © CEI 1983
TYPE DE BRIDE
154 IEC — ULM 12
FIGURE 1
FLANGE TYPE
Voir paragraphe
2.1.6
See Sub-clause
Section transversale I _I
Cross-section
trous d'alignement
alignment holes
voir tableau I
U VO—VV O
Z O
see Table
-- Y
min
030/83
Vue de face
Front view
* Ces dimensions ne sont pas essentielles
pour l'accouplement * These dimensions are not essential for the mating
de deux brides montées.
of two assemblies.
Mode de projection: premier dièdre
Date: 1981
First angle projection
July
154-6 © IEC 1983
— 17 —
TY
...