Standard_ID | GB/T 12227-2005 (GB/T12227-2005; GBT 12227-2005; GBT12227-2005) |
Summary | This standard specifies: ventilation valve ductile iron castings technical requirements, test methods, inspection rules and signs, packaging and storage. This standard applies to: General valves, flanges, fittings, and other pressure ductile iron castings. |