ISO (the International Organization f‹›r Standarrlization) is a worldwide federation of National standards bodies (ISO member bodies)。 The work of preparing International Standards is normally carried out through ISO technical committees。 Each merriber body interested in a subject for which a technical committee has been established has the right to be represented on that committee。 International organizations。 governmental and non-governmental, in liaison with ISO, alsn take part in the work。 ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of eleclrolechnical standardization。82239

International Sandards are drafted in accorrJance with the rules given in the ISO/DEC Directives, Part 2。

The main task of iechniwi committees is to prepare International Standards。  Draft  International  Sl¿ndard» adopted by the technlcal r:ommittees are circulated to the member bodies for voting。 Publico[iorl gs  an International Standard requires  approval  by at  least 75 °/»  of the member bodies AS{in9 ii VOC。

Attention is drawn to the possibility that some of the elements of this document may be the subject of patant rights。 ISO shall not be held responsible for identifying any or all such patent rights。

ISO 17292 wac prepared by Technical Committee ISO/TC 153。 V’a/Ws, Subcommittee SC 1。 Oesign, mari‹//acfure, marking and fesfinp in collaboration with TcchnicaJ Committee ISO/TC 67, /\4atsria/s, egt/ipmenf and o/fsnore cfructures for pvfro/eu/», peimcheni ical and natural Q6S fNJUS/rfos, Subcommittee  SC 6。 Processing  equipment  and systems。

Introduction

The purpose of this International Standard is the es\ablishmenL in ISO format, of  basic  requirements  ago practicee for flanged, 0utt-welding, socket welding, and threaded eftd GTeel bell  VDlV6s  having  flow passageways  identified as fuli bore, reduced bore, and doJble reduced bore seat openings suitable    for

petroleum, petrochemical and allied industries applications lhat parallel those given in American Pekoleum Institute Standard API 608。

It is not the  purpose  of this  International  St6ndar‹1 to  replace ISO 7121 or any other  International  Standard that Is not  identified  with  petroleum  refinery,  petrochemical  or natural gas industry applications。

In  this  International  Standard,  flanged  end  Class-designated  valves  have  Ranges   in  accordance   with ASME BJ6。5。 Flanged end PN-designated valves have flanges in accordance with EN 1092-1。 Valves c/ith ends threaded may have threads to either ISO 7—1 or ASME 81。20。\ 。

Metal ball valves for petroleum, petrochemical and allied industries

This International Standard spewfies the rcq‹tirements for a series of met。n l ball valves suitable for petroleum, etFDCQeml?fi\,  •• 9aS plants, and refaterl industrial applica« ons。

It covers valves Of [the ftominal sizes  ON

—    8。 10, 15, 20  2S, 22, 40, TO, 65, 80。 100, 1bO, 20fJ  250  300  350  400  450,  SOO

” corresponding to nominal pipe sizes  NF•’S

— PN 16: 25, 40。

—body seat openings designated as iull r orc, reduced bore and double reduced bore;

—materials。