... Certificate:API,ISO,CCS DIN2631 WELDINGNECK FLANGE Types of flangeWeld neck flange, slip on flange, plate flange, blind flange, socket ... -rust varnish, anti-rust oil,hot-galvanized, etc.Packing Wooden case or as custmers’requirementApplicationspetroleum, gas, chemical, metallurgy, electric station, ... ,and ISO9001:2000Productivity10000 ton per monthKeywords DIN 2631 WELDING NECK FLANGE DIN 2631 WELDING ...