1)stainless/carbon steel 2)DN10-500&3/4-25"or bigger 3)ISO9001:2000 4)GB,HG,JB,BS,JIS,DIN Stainless steel welded neck flange Feature: Stainless steel welded neck flangeSpecification: DN10-500&3/4"-25"or biggerStandard: GB,HG,JB,BS,JIS,DIN...Application: dairy products,beer,food,cosmetics and chemical industryMaterial:stainless /carbon steel Stainless steel welded neck flange