This standard specifies threaded malleable cast iron pipe fittings (hereinafter referred to as fittings) used for general piping for water, oil, steam, air, gas, etc.
JIS B 2301:2004 history
2013JIS B 2301:2013 Screwed type malleable cast iron pipe fittings
2004JIS B 2301:2004 Screwed type malleable cast iron pipe fittings
1999JIS B 2301:1999 Screwed type malleable cast iron pipe fittings
1998JIS B 2301:1998 Screwed type malleable cast iron pipe fittings
1995JIS B 2301:1995 Screwed type malleable cast iron pipe fittings