2 622h500 E06T59h 7268-83 INTERNATIONALSTANDARDISO7268-1983/AMENDMENT1 tso E-08101 E-15-05 Published 1984-07-15 INTERNATIONAL ORGANIZAT FORSTANDARDIZATION? MEKAYHAPOAHAAOPTAHM3AMRNOCTAHAAPTW3AUMM-ORGANISATIONINTERNATIONALEDENORMALISATION Pipe components -- Definition of nominal pressure AMENDMENT1 Tuyauterie- Definitiondelapressionnominale Amendement1 Amendment 1 to International Standard ISo 7268-1973 was developed by Technical Committee ISO/TC 5, Ferrous metal pipes and metallic fittings. It was submitted directly to the Iso Council, in accordance with clause 6.11.2, part 1 of the Directives for the technicalworkof/sO. Page 1 Clause2Definition Delete the text and substitute : nominal pressure (PN) : A numerical designation which is a convenient rounded number for reference purposes. Ail equipmentofthesamenominalsize(DN)designatedbythesamePNnumbershallhavecompatiblematingdimensions NOTES 1 The maximum allowable working pressure depends on, materials, design and working temperatures, and should be selected from the tables of pressure/temperature ratings given in the appropriate standards. 2 It is designated by the letters "PN" followed by the appropriate reference number. 7268-1983/A1-1984 (E) UDC 621.643.4 :532.11 Ref.No.ISO7268-1983/A1-1984(E) Descriptors : piping, metal tubes, pipe flanges, pressure, definitions, ratings. InternationalOrganizationforStandardization，1984 OSI Printed in Switzerland Price group A Information Handling Services, 2oo0 E-0-01 7268-83 E 0E2hS00 E06TS E-15-D5 International Standard ISo 7268 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEXAYHAPOAHAR OPTAHM3AUMA O CTAHAAPTW3AUWWORGANISATION INTERNATIONALE DE NORMALISATION Pipe components - Definition of nominal pressure Tuyauterie-- Definitiondelapressionnominale First edition - 1983-05-01 UDC621.643.4:532.11 Ref.No.1SO7268-1983 (E) ISO 7268-1983 Descriptors:piping,pipeflanges,determination,pressure. Price based on 1 page Information Handling Services, 2ooo 7268-83 E06TSh 0054231 5 Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (Iso member bodies). The work of developing Inter- national Standards is carried out through ISo technical committees. Every member body interested in a subject for which a technical committee has been authorized has the right to be represented on that committee.International organizations,govern- mental and non-governmental, in liaison with iso,also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. International Standard ISO 7268 was developed by Technical Committee ISO/TC 5, Ferrous metal pipes and metallic fittings, and was circulated to the member bodies in November1980. It has been approved by the member bodies of the following countries : Belgium India Norway Brazil Ireland South Africa, Rep. of Canada Israel Spain Czechoslovakia Italy Sweden Finland Japan Switzerland France Korea, Dem. P. Rep. of United Kingdom Germany, F.R. Korea, Rep.of USA Hungary Netherlands The member bodies of the following countries expressed disapproval of the document ontechnicalgrounds: Australia Poland Romania USSR (t.) International Organization for Standardization, 1983 Printed in Switzerland InformationHandling Services, 2ooo