Butt welding flange&Slip on flange(SO flange) 1) Size: 1/2 - 24" 2) Pressure class: 150 - 1, 500lbs 3) Material: Stainless steel(SS304/SS304L/SS316/SS316L etc), 4) Strandards: ANSI B16.5/DIN/UNI/JIS/GB skype:fangdongxi yahoo:fangdongxi msn:fao888@hotmail.co m