JIS G3459 Japanese Industrial Standard specifies the stainless steel pipes (hereafter referred tp as "pipes") used for the pipings for corrosion resistance,low temperature service,high temperature serice,etc.JIS G3459 Standard main steel grade:SUS 347 HTP,SUS 347 TP,SUS 321 HTP,SUS 321 TP,SUS 317 LTP and so on.