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。 石油化工及相关金属球阀行业英文文献和中文翻译:http://www.youerw.com/fanyi/lunwen_96412.html