4851903 0054229 7268-83 7 INTERNATIONALSTANDARDISO7268-1983/AMENDMENT1 E-08101 E-5-05 Published 1984-07-15 R STANDARDIZATIONOMEKAYHAPOAHAA OPrAHM3ALMA NO CTAHAAPTW3ALWM-ORGANISATION INTERNATIONALE DE NORMALISATION INTERNATIONALORGANIZATIC OR Pipe components -- Definition of nominal pressure AMENDMENT 1 Tuyauterie Definition de la pression nominale 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 technical work of IsO. Page 1 Clause2Definition Delete the text and substitute : nominal pressure (PN) : A numerical designation which is a convenient rounded number for reference purposes. All equipment of the same nominal size (DN) designated by the same PN number shall have compatible mating dimensions. NOTES The maximum allowable working pressure depends on, materials, design and working temperatures, and should be selected from the tables of 1 2 It is designated by the letters "PN" followed by the appropriate reference number. ISO 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. @International Organization for Standardization, 1984 Printed in Switzerland Price group A CoPYRIGHT 2ooo International Organization For Standardization Information Handling Services, 2000 E-0-01 EobtSh 3 0E2500 8 7268-83 7268 (ISO International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXKAYHAPOAHAA OPTAHM3AUMA NO CTAHAAPTW3AUWM+ORGANISATION INTE RNATIONALE DE NORMALISATION Pipe components - Definition of nominal pressure Tuyauterie--Definitionde la pression nominale First edition - 1983-05-01 UDC 621.643.4:532.11 ISO 7268-1983 (E) Ref.No. SO 7268-1983 ( Descriptors : piping, pipe flanges, determination, pressure. Price based on 1 page CoPYRIGHT 2ooo International Organization For Standardization Information Handling Services, 2000 7260-83 EO6TSh 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 Ireland South Africa, Rep. of Brazil Spain Canada Israel Czechoslovakia Italy Sweden Switzerland Finland Japan Korea, Dem. P. Rep. of United Kingdom France Korea, Rep.of USA Germany, F.R. Hungary Netherlands The member bodies of the following countries expressed disapproval of the document on technical grounds : Australia Poland Romania USSR (.) International Organization for Standardization, 1983 Printed inSwitzerland COPYRIGHT 200 International Organization For Standardization Information Handling Services, 2000