BIBCOCK USING TUBE MATERIAL AND METHOD OF MANUFACTURING SAME

摘要

A bibcock using a tube material comprises a bibcock body (11) of a metallic tube material having a fluid control mechanism arranged therein and having a projecting cylindrical flange (21) integrally formed on an outer side surface thereof, said flange being configured such that an opening disposed at a base portion of the flange in communication with an inner flow passage is larger in area than an opening disposed at a tip end of the flange, and a flow passage forming cylindrical member (12), of which a base end is fitted on the tip end of the cylindrical flange (21) to be connected thereto. An inner peripheral portion (21a) of the base end of the cylindrical flange (21) is defined by a curved surface, along which a flow passage is formed.