BS EN ISO 17292:2004 pdf free.Metal Ball Valves For The Petroleum, Petrochemical And Allied Industries.
BS EN ISO 17292 specifies the requirements for a series of metal ball valves suitable for petroleum, petrochemical, natural gas plants, and related industrial applications. It covers valves of the nominal sizes DN 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450 and 500, corresponding to nominal pipe sizes NPS 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2, 2, 2 1/2, 3, 4, 6, 8, 10, 12, 14, 16, 18 and 20, and is applicable for pressure designations of Class 150, 300, 600 and 800 (the last applicable only for valves with reduced bore and with threaded and socket welding end), and PN 16, 25 and 40.
The purpose of this International Standard is the establishment, in ISO format, of basic requirements and practices for flanged, butt-welding, socket welding, and threaded end steel ball valves having flow passageways identified as full bore, reduced bore, and double reduced bore seat openings suitable for petroleum, petrochemical and allied industries applications that parallel those given in American Petroleum Institute Standard API 608.
It is not the purpose of this International Standard 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 flanges in accordance with ASME B16.5. Flanged end PN-designated valves have flanges in accordance with EN 1092-1. Valves with ends threaded may have threads to either ISO 7-1 or ASME B1.201.
3 Terms and definitions
For the purposes of this document, the definitions for pressure designation, Class, and nominal valve size NPS given in ASME B16.34, the definition of pressure designation PN given in EN 1333, and the following terms and definitions apply.
3.1
DN
alphanumeric designation of size for components of a pipework system, which is used for reference purposes,
comprising the letters DN followed by a dimensionless whole number which is indirectly related to the physical
size, in millimetres, of the bore or outside diameter of the end connections
[ISO 6708:1995, definition 2.1]
3.2
anti-static design
design that provides for electrical continuity between the body, ball and stem of the valve.
4 Pressureltemperature ratings
4.1 Valve rating
The service pressure/temperature rating applicable to valves specified in this International Standard shall be the lesser of the shell rating (see 4.2) or the seat rating (see 4.3).
4.2 Shell rating
4.2.1 The pressure/temperature ratings applicable to the valve pressure containing shell (the pressure boundary elements — e.g. body, body cap, trunnion cap, cover, body inserts) shall be in accordance with those specified in the pressure/temperature tables of either ASME B16.34, Standard Class for Class- designated valves, or EN 1092-1 for PN-designated valves.
4.2.2 The temperature for a corresponding shell pressure rating is the maximum temperature that is permitted for the pressure containing shell of the valve. In general, this maximum temperature is that of the contained fluid. The use of a pressure rating corresponding to a temperature other than that of the contained fluid is the responsibility of the user. For temperatures below the lowest temperature listed in the pressure/temperature tables (see 4.2.1), the service pressure shall be no greater than the pressure for the lowest listed temperature. Consideration should be given to the loss of ductility and impact strength of many materials at low temperature.