金属法兰 — 第3部分：铜合金及复合法兰

5 Dimensions

5.1 Range of nominal sizes

The range of nominal sizes applicable to each flange type and to each pressure rating shall be as specified in table 2.

NOTE — The sizes of copper and copper alloy tubes are designated by reference to the outside diameter in millimetres.

5.2 Dimensional details

Dimensions of flanges shall be in accordance with the following tables, as appropriate:

• table 3 for ISO PN6 flanges
• table 4 for ISO PN10 flanges
• table 5 for ISO PN16 flanges
• table 6 for ISO PN20 flanges
• table 7 for ISO PN25 flanges
• table 8 for ISO PN40 flanges
• table 9 for ISO PN50 flanges

NOTES

1 The bore sizes of type 21 flanges are usually equal to the nominal size of the pipe, valve or fitting of which they form a part and the actual bore sizes are usually given in the appropriate product standard.

2 Where type 07, 12 and 14 flanges are for use with soft soldering techniques only, then reference should be made to ISO 2016 for socket depths.

3 For type 04 and 11 flanges the recommended weld preparation angle is 37,5° ± 2,5° when butt welding to pipe with thicknesses of 3 mm and greater.

6 Joint facings and surface finish

6.1 Types 01, 11, 12, 14 and 21 flanges shall be supplied with flat faces for use with full-face gaskets.

NOTES

1 Notes at the foot of table 3 (ISO PN6), table 4 (ISO PN10), table 5 (ISO PN16) and table 7 (ISO PN25) indicate which sizes may be used in conjunction with inside bolt circle gaskets and type 02, 04, 05 and 07 flanges.

2 Where type 21 flanges in table 3 (ISO PN6), table 4 (ISO PN10), table 5 (ISO PN16) and table 7 (ISO PN25) in sizes up to and including DN 100 are required for bolting to flanges with raised faces, then the appropriate flange thickness (C₁*) given in table 8 (ISO PN40) applies.

6.2 Where type 01, 11, 12 and 14 flanges in sizes above DN 50, and type 21 flanges in sizes above DN 100 are required to be bolted to existing raised face type steel or cast iron flanges, then the raised faces shall be removed.

6.3 Where type 01, 11, 12, 14 and 21 flanges for ISO PN20 and ISO PN50 are required to be bolted to existing raised face type steel or cast iron flanges, then the raised faces on all sizes shall be removed.

6.4 All flange jointing faces shall be finished in accordance with table 1. The faces shall be compared by visual or tactile means with reference specimens which conform to the R_a and R_z values given in table 1.

NOTES

1 It is not intended that instrument measurements are taken on the flange faces, and the R_a and R_z values as defined in ISO 468 relate to the reference specimens.

2 Other finishes may be agreed between the manufacturer and purchaser.

Table 1 — Surface finish of flanges

Values in micrometres

Manufacturing process	Ra	Rz
Turning1)	3,2 to 12,5	12,5 to 50
Other2)	3,2 to 6,3	12,5 to 25

1) "Turning" covers any method of machine operation producing either serrated concentric or serrated spiral grooves.

2) Processes other than turning are permissible provided that they give a surface finish in compliance with the R_a and R_z values specified.

6.5 Flange rims are permitted to be machined or left un-machined.

6.6 Composite flanges shall be machine finished, or have a surface equivalent to that obtained by machining on all locating diameters, bores and abutment faces. The abutment faces shall be flat and square to the bore axis.

7 Drilling and spot-facing

7.1 Unless otherwise specified by the purchaser, all bolt holes shall be equally spaced on the pitch circle diameter, K. In the case of integral flanges, the bolt holes shall be positioned off-centre.

7.2 Bearing surfaces for the nuts shall be parallel to the flange jointing face within 1° and shall be capable of accepting a normal series washer complying with the requirements of ISO 887.

7.3 Any back-facing or spot-facing required to accomplish this shall not reduce the flange thickness to less than the minimum specified.

7.4 When a bossed or integral flange is back-faced, it is permissible for the fillet to be reduced but the fillet shall not be eliminated entirely.

8 Tolerances

Flanges shall be manufactured to comply with the tolerances specified in table 12.

6

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En ce qui concerne la terminologie générale, le lecteur se reportera à la Publication 50 de la CEI : Vocabulaire Electrotechnique International (VEI), qui est établie sous forme de chapitres séparés traitant chacun d'un sujet défini, l'Index général étant publié séparément. Des détails complets sur le VEI peuvent être obtenus sur demande.

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Terminology

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• IEC Publication 27 : Letter symbols to be used in electrical technology ;
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IEC publications prepared by the same Technical Committee

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2

NORME INTERNATIONALE INTERNATIONAL STANDARD МЕЖДУНАРОДНЫЙ СТАНДАРТ

NORME INTERNATIONALE INTERNATIONAL STANDARD МЕЖДУНАРОДНЫЙ СТАНДАРТ

CEI IEC 50(426) Première édition First edition 1990-10 Vocabulaire Electrotechnique International Chapitre 426 : Matériel électrique pour atmosphères explosives International Electrotechnical Vocabulary Chapter 426 : Electrical apparatus for explosive atmospheres Международный Электротехнический Словарь Глава 426 : Электрооборудование для взрывоопасных сред © CEI 1990 Droits de reproduction réservés - Copyright - all rights reserved - Право издания охраняется законом Aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Запрещается Без письменного разрешения издателя воспроизведение или копирование этой публикации или ее части в любой форме или любыми средствами — электронными или механическими, включая фотоконю и микрофильм. Bureau central de la Commission Electrotechnique Internationale 3, rue de Varembé Genève Suisse Commission Electrotechnique Internationale International Electrotechnical Commission Международная Электротехническая Комиссия Code prix Price code Код цены S Pour prix, voir catalogue en vigueur For price, see current catalogue Цена указана в действующем каталоге 3

50(715) © IEC:1996

CONTENTS

FOREWORD	VII
PREFACE	VII
Sections
715-01	Basic terms	1
715-02	Resources	10
715-03	Calls	17
715-04	Times and delays	22
715-05	Traffic	24
715-06	Circuit groups	32
715-07	Traffic engineering	34
715-08	Networks	41
715-09	Circuit switched networks	46
715-10	Message switched networks	51
715-11	Packet switched networks	52
Index	53

:current

Foreword

This document (EN 10216-3:2002) has been prepared by Technical Committee EC/TC 29, "Steel tubes and fittings for steel tubes", the secretariat of which is held by UNI.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latest by November 2002.

This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.

Other Parts of EN 10216 are:

Part 1:	Non-alloy steel tubes with specified room temperature properties
Part 2:	Non-alloy and alloy steel tubes with specified elevated temperature properties
Part 4:	Non-alloy and alloy steel tubes with specified low temperature properties
Part 5:	Stainless steel tubes

Another European Standard series covering tubes for pressure purposes is:

EN 10217:

Welded steel tubes for pressure purposes

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

5

ISO 657-1 : 1988 (E)

Table 1 — Dimensions and sectional properties of hot-rolled equal-leg angles (concluded)

Designation	Mass kg/m	Sectional area cm²	Dimensions		Distances of centre of gravity		Sectional properties about axes
			X-X = Y-Y		U-U								V-V
			A mm	l mm	rroot mm	cx = cy cm	cu cm	cv cm	Ix = Iy cm⁴	rx = ry cm	Zx = Zy cm³	Iu cm⁴	ru cm	Iv cm⁴	rv cm	Zv cm³
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)	(11)	(12)	(13)	(14)	(15)	(16)	(17)
200 × 200 × 16	48,5	61,8	200	16	18	5,52	14,1	7,81	2 340	6,16	162	3 720	7,76	960	3,94	123
200 × 200 × 20	59,9	76,3	200	20	18	5,68	14,1	8,04	2 850	6,11	199	4 530	7,70	1 170	3,92	146
200 × 200 × 24	71,1	90,6	200	24	18	5,84	14,1	8,26	3 330	6,06	235	5 280	7,64	1 380	3,90	167
250 × 250 × 28	104	133	250	28	18	7,24	17,7	10,2	7 700	7,62	433	12 200	9,61	3 170	4,89	309
250 × 250 × 35	128	163	250	35	18	7,50	17,7	10,6	9 260	7,54	529	14 700	9,48	3 860	4,87	364

NOTES

1. Member countries may choose, to be included in their national standards, the sizes which are required to meet their demand.
2. For the angles so chosen, only thicknesses which can be rolled in their mills to meet the demand of the users may be selected from the list of thicknesses corresponding to equal angles in table 1.
3. The sectional area has been calculated using the formula

   S = [l/2 A - l) + 0,214 6 (r_root² - 2r_toe²)] × 1/100

   where
   

   S is the sectional area, in square centimetres;
   

   l is the thickness, in millimetres;
   

   r_root is the root radius, in millimetres;
   

   r_toe is the toe radius, in millimetres;
   

   A is the leg length, in millimetres.

4. Mass is calculated on the basis of density of steel of 7,85 kg/dm³.

   4