Features: 1) Big size flange with welding neck, rough machining 2) Standards: ASTM, ASME, AISI, AP Features: 1) Big size flange with welding neck, Standards: ASTM, ASME, AISI, API, UNI, DIN, SIS and EURONORM 3) Materials: carbon and stainless steel 4) Customers' designs welcomed. Flange