This standard specifies the general requirements for pressure-temperature rating of power station valves, as well as materials, design, inspection, marking, package, storage, transportation and delivery documents; it also provides the guide for order requirements.
This standard is applicable to valves used for power station steam and water circuit under the following parameters and conditions:
--The nominal pressure is not greater than 42MPa and the maximum service temperature is not greater than 450℃;
--The work stress is not greater than 26MPa and the maximum service temperature is not greater than 540℃;
--The work stress is not greater than 6MPa and the maximum service temperature is not greater than 570℃;
2 Normative References
Provisions of the following documents, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this code are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative document is applicable to this standard.
