... welding neck flanges, and their life under fatigue is about one-third that of the latter.General Description1,Carbon steel, ... ,Types: Flat Face Flanges, Slip On, Welding Neck, Blind, Threaded , etc.4,Water , Oil, Gas, Industrial UsingDetailed DescriptionFeatures:1) Types:a) ... ) ANSI, DIN, EN1092-1, NFE, AS, JISb) Customers' drawings for special use4) Sizes we can produce: DN10 to DN30005) Types ...