© ISO 2016 Automatic steam traps — Marking Purgeurs automatiques de vapeurs d’eau — Marquage INTERNATIONAL STANDARD ISO 6553 Second edition 2016 12 15 Reference number ISO 6553 2016(E) International O[.]
INTERNATIONAL STANDARD ISO 6553 Second edition 2016-12-15 Automatic steam traps — Marking Purgeurs automatiques de vapeurs d’eau — Marquage Reference number ISO 6553:2016(E) I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n © ISO 2016 ISO 6553:2016(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2016, Published in Switzerland All rights reserved Unless otherwise specified, no part o f this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission Permission can be requested from either ISO at the address below or ISO’s member body in the country o f the requester ISO copyright o ffice Ch de Blandonnet • CP 401 CH-1214 Vernier, Geneva, Switzerland Tel +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org ii I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 6553:2016(E) Contents Page Foreword iv Introduction v Scope Normative references Terms and definitions General requirements Mandatory marking Optional markings Additional markings Bibliography © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n iii ISO 6553:2016(E) Foreword I SO (the I nternational O rganiz ation for Standardiz ation) is a worldwide federation of national s tandards bodies (ISO member bodies) The work o f preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has b een es tablished has the right to b e represented on that committee I nternational organi zation s , governmental and non- governmental, in liaison with I SO, al so take p ar t in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters o f elec trotechnical s tandardi z ation T he procedures used to develop this cument and those intended for its fur ther maintenance are describ ed in the I SO/I E C D irec tives , Par t I n p ar ticu lar the different approval criteria needed for the di fferent types o f ISO documents should be noted This document was dra fted in accordance with the editorial ru les of the I SO/I E C D irec tives , Par t (see www iso org/direc tives) Attention is drawn to the possibility that some o f the elements o f this document may be the subject o f patent rights ISO shall not be held responsible for identi fying any or all such patent rights Details o f any patent rights identified during the development o f the document will be in the Introduction and/or on the I SO l is t of p atent declarations received (see www iso org/p atents) Any trade name used in this document is in formation given for the convenience o f users and does not cons titute an endors ement For an explanation on the meaning o f ISO specific terms and expressions related to formity assessment, as well as information about I SO ’s adherence to the World Trade O rganization ( WTO) principles in the Technical B arriers to Trade (TB T ) see the following URL: www.iso.org/iso/foreword html This document was prepared by the European Committee for Standardization (CEN) Technical C ommittee C E N/ TC 69, Valves, Industrial valves, in col lab oration with I S O Technical C ommittee I SO/ TC , in accordance with the agreement on technical coop eration b etween I SO and C E N ( Vienna Agreement) This second edition cancels and replaces the first edition (ISO 6553:1980), which has been technically revised with the marking up dated to b e in accordance with I SO 52 and E N 19 iv I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 6553:2016(E) Introduction The purpose of this document is to establish certain basic requirements for the marking of automatic steam traps, and to give recommendations for additional information markings T h i s c u ment s , i n genera l, to b e s idere d i n conj u nc tion with the s p e c i fic re qu i rements wh ich may b e agre e d b e twe en the p ar tie s concerne d © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n v I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n INTERNATIONAL STANDARD ISO 6553:2016(E) Automatic steam traps — Marking Scope T h i s c ument s p e c i fie s mandator y and op tiona l ma rki ngs for automatic s te am trap s Normative references There are no normative references in this document Terms and definitions For the pu r p o s e s o f th i s c u ment, the term s and defi nition s given i n I S O 5 apply ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia.org/ — ISO Online browsing platform: available at http://www.iso.org/obp General requirements T he s p e c i fie d marki ngs sh a l l b e appl ie d: — either on the b o dy, or — on plate s i ntegra l with the b o dy or s e c u rely fi xe d on the b o dy I n no c as e s l l the ma rki ngs b e h idden b y the fi xi ng elements o f the s te am trap Mandatory marking The following items shall be marked on the automatic steam trap: — manufacturer’s name and/or trademark; — maximum allowable pressure (bar or MPa) 1) ; — maximum allowable temperature (°C); — i nd ic ation o f the flow d i re c tion (arrow) ; — shell material designation; — nominal size (DN or NPS); — nominal pressure (PN or Class designation) T h i s ma rki ng i s i n compl i ance with I S O a nd E N 19 I f a s te am trap s no defi ne d PN or C l as s de s ignation, ma xi mu m a l lowable pre s s u re and ma xi mu m a l lowable temp eratu re are ma ndator y For PN or Class designated steam traps, it is permissible to omit the letters “DN” or “NPS” from the nom i na l size de s ignation provide d the PN or C la s s de s ignation fol lows i m me d iately a fter the size 1) bar = 0,1 MPa © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 6553:2016(E) number and is on the same line For example, DN 50 PN 25 may be abbreviated to 50 PN 25 and NPS Class 300 may be abbreviated to CL 300 NOTE For steam traps less than or equal to DN 50 or NPS , the shell material marking can be omitted Optional markings The following items may be marked on the automatic steam trap: — maximum operating pressure, or maximum differential pressure, according to the relative significance o f each one; — maximum test pressure (bar or MPa) Additional markings A manufacturer having complied with the requirements in Clause to Clause may a) mark any o f the items mentioned in Clause and Clause in more than one place, EXAMPLE I f an item is marked on the body, it may also be repeated on the identification plate b) add any other markings EXAMPLE Catalogue item numbers, provided that there is no risk of confusion between these markings and those mentioned in Clause and Clause I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 6553:2016(E) Bibliography [1] [2] [3] ISO 5209, General purpose industrial valves — Marking ISO 6552, Automatic steam traps — Definition of technical terms EN 19, Industrial valves — Marking of metallic valves © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n ISO 65 : 01 6(E) ICS 23.060.01 Price based on pages © ISO 2016 – All rights reserved I n tern ati o n al Org an i z ati o n fo r S tan d ard i z ati o n