1 Scope
This Standard specifies technical requirements, test methods, inspection rules, as well as marking, packaging, and storage of general purpose industrial valves - flake graphite iron castings.
This Standard is applicable to general purpose industrial valves, flanges, pipe fittings and other pressure-containing flake graphite iron castings(hereinafter referred to as casting).
2 Normative References
The following normative documents contain provisions which, through reference in this Standard, constitute provisions of this Standard. For dated reference, subsequent amendments (excluding corrigendum), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this Standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition applies.
GB/T 6060.1 Roughness Comparison Specimens - Cast Surfaces (GB/T 6060.1—1997，eqv ISO 2632-3;1979)
GB/T 6414 Castings - System of Dimensional Tolerances and Machining Allowances (GB/T 6414—1999，eqv ISO 8062:1994)
GB/T 7216 Gray Cast Iron Metallography (GB/T 7216—1987，neq ISO 945:1975)
GB/T 9439-1988 Grey Iron Castings
GB/T 11351 Mass Tolerances for Castings
