This standard specifies the terms and definitions, specifications, models, technical requirements, test methods, inspection rules, marking and packaging, storage and transportation, installation and use requirements of blast furnace cold air relief valves. This standard is applicable to blast furnace cold air relief valves with working pressure not greater than 0.6MPa, working temperature not greater than 300°C, and nominal dimensions DN500 to DN2200.
YB/T 4233-2010 Snort valve for BF was changed to GOST 11970.0-2003 Textile materials. Threads. The series of nominal values of linear density of single cotton yarn.