... as you nee 1.This type of flange strictly executive ANSI B 16.5/ANSI B 16.47(JIS/DIN/BS/GB) standard;2.DN15-DN2000(NPS1 ... );4.advanced production equipment ,sophisticated manufacturing technology,complete inspection means;5.The material of stainless steel includes 201#,202#,301#,304 ... #,304L#,316#,316L#,321#, class with PN0.25MPa-16.0MPa(class 150,300,400,600,900,1500,2500 etc ...