JIS B2312-1997 Steel butt-welding pipe fittings
This Standard specifies the steel and nickel-chromium ferro-alloy seamless pipe fit-tings to be fitted by butt-welding, mainly to pressure service pipings, high pressure service pipings, high temperature service pipings, alloy steel pipings, stainless steel pipings, low temperature service pipings, and steel pipes for fired heaters, (hereafter referred to as “pipe fittings”).
The special quality requirements, a part of or all of which may be designated by the agreement between the purchaser and the manufacturer, are given in Annex JA and the requirements of special shape pipe fittings are specified in Annex JB. The shapes and dimensions of special bevel ends are shown in Annex JC and marking and report for pipe fittings with special necks are shown in Annex JD for reference.
