ISO 6002 pdf free download

ISO 6002-2021 pdf free download.Industrial valves – Bolted bonnet steel gate valves.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain term inological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.orgJobp
— IEC Electropedia: available at hItp://wwwIetropdia.orgj
3.1
nominal size
DN
N PS
alphanumeric designation of size for components of a pipework system, which is used for reference
purposes, comprising the letters DN or NPS followed by a dimensionless number indirectly related to
the physical size, in millimetres, of the bore or outside diameter of the end connections
Note 1 to entry: The number following the letters DN or NPS does not represent a measurable value and is not used for calculation purposes except where specified in the relevant standard.
Note 2 to entry: See ISO 6708 and ASME B 16.34.
2 C ISO 2021 — All rights reserved
ISO 6002:2021(E)
3.2
PN
Class
alphanumeric designation for pressure-temperature rating that is common for components used in a piping system, used for reference purposes, comprising the letters “PN” or “Class” followed by a dimensionless number indirectly related to the pressure retaining capability as a function of temperature of the component
Note 1 to entry: The number following the letters PN or Class does not represent a measurable value and is not used for calculation purposes except where specified in the relevant standard. There is no definitive correlation that links PN designations to Class designations.
Note 2 to entry: See ISO 7268 and ASME B16.34.
4 Pressure/temperature ratings
4.1 The pressure/temperature ratings shall he in accordance with EN 12516-1 for PN-designated valves and in accordance with ASME B 16.34 for Class-designated valves.
4.2 The temperature shown for a corresponding pressure rating is the temperature of the pressure- containing shell of the valve. In general, this temperature is the same as 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.
4.3 For temperatures below the lowest temperature listed in the pressure/temperature rating tables, the working pressure shall not be greater than the pressure stated for the lowest listed temperature. The use of valves at lower temperatures is the responsibility of the user. Consideration should be given to the loss of ductility and impact strength of many materials at low temperature.
S Design
5.1 Body wall thickness
5.1.1 The terms used in 51. are illustrated in Figure 1. d is the minimum inside diameter given in Table 1.
5.1.2 The minimum body wall thickness, Tm at the time of manufacture, shall be in accordance with:
— EN 12516-1 or EN 12516-2 for PN-designated valves,
— ASME B16.34 or EN 12516-1 for Class-designated valves. Exceptions are given in 5J3 to &L5.
Additional metal thickness needed for assembly stresses, closing stresses, stress concentrations and shapes other than circular shall be determined by the manufacturers, since these factors vary widely.
5.1.3 The weld preparation in butt-welding end valves (see 5.2.2.2) shall not reduce the body wall thickness to less than the values specified in 51.2 within a region closer to the outside surface of the body neck than Tm measured along the run direction.
The transition to the weld preparation shall be gradual and the section shall he essentially circular through the entire length of the transition. Sharp discontinuities or abrupt changes in section in areas that infringe into the transition shall be avoided, except that test collars or bands, either welded or integral, are allowed.ISO 6002 pdf download.