This standard specifies terms and definitions, structure and basic parameters, technical requirements, materials, test methods, inspection rules, and protection, marking, packing, transportation and storage of those iron plug valves by flange connection and internal thread connection.
This standard is applicable to the short-composition plug valves, normally plug valves, venturi plug valves and full port plug valves of circular hole, of which the nominal pressure is PN2.5~PN25 and the nominal size is DN15~DN600.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this Standard. For dated reference, subsequent amendments to (excluding corrigendum), or revisions of, any of these publications do not apply. However, the parties to agreements based on this Standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB/T 12240-2008 The following standards are cited：
