This standard specifies the structural types, technical requirements, test methods, inspection rules, markings and delivery specification etc. of flanged iron gate valves.
This standard is applicable to flanged gray iron and spheroidal graphite cast iron gate valves (hereinafter referred to as gate valve) with PN1~25 in nominal pressure and DN 50~ 2000 in nominal diameter.
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 correction to), 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 12232-2005 The following standards are cited：
