... .materials:201,301,304,316,etc 2.ISO certification 3.Standards: /ASTM/ASME/DIN/JIS and etc stainless steel flanges with high quality ... attention all the time. type stainless steel flange size DN10-DN 1200,150#-2500# grade321, 304, 304L, 316, 316L, 317, 317L,310s,904L ... . We can make new products according to your drawingsPictures shows: 316 stainless steel flanges