JIS B2316-2007 Steel socket-welding pipe fittings.
This Japanese Industrial Standard specifies the steel seamless pipe fittings, to be fitted by socket-welding mainly to pressure service pipings, high pressure service pipings, high temperature service pipings, alloy steel pipings, stainless steel pipings and low temperature service pipings.
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JIS-B2316-Steel-socket-welding-pipe-fittings2.pdf
Research use only,Commercial use is prohibited.
If you want to use it ,you can buy from following link:
http://www.webstore.jsa.or.jp/webstore/Com/FlowControl.jsp?lang=en&bunsyoId=JIS+B+2316%3A2007&dantaiCd=JIS&status=1&pageNo=0