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METHOD FOR FASTENING WATER SERVICE PIPE FLANGE PART, SEAL MEMBER AND FASTENING STRUCTURE OF WATER SERVICE PIPE FLANGE PART
METHOD FOR FASTENING WATER SERVICE PIPE FLANGE PART, SEAL MEMBER AND FASTENING STRUCTURE OF WATER SERVICE PIPE FLANGE PART
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机译:供水管道法兰零件的密封方法,密封件和供水管道法兰零件的粘结结构
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摘要
PROBLEM TO BE SOLVED: To provide a seal washer capable of restricting droppage of a seal surface from a bolt hole peripheral edge portion without making any large diameter formation of the seal washer.SOLUTION: A seal washer 1 is interposed between seat surfaces 20, 30 of a bolt 2 or a nut 3 and a flange part 40 of a water service pipe 4 and used for tightly sealing a bolt hole 40s formed at the flange part 40. The seal washer 1 has an annular seal member 10 where a seal surface 10f that is used for tightly contacting with a bolt hole peripheral edge portion 40f at an end part becoming a flange part side and having an insertion hole 10s formed by an elastic member to pass through a bolt shaft part 21; and a frame member 11 harder than that of the seal member 10. The peripheral edge part of an insertion hole 10s of the seal member 10 is provided with a fin part 12 protruded from the seal surface 10f in an axial direction under a natural state where any external force may not act and that can be inserted into a clearance between the bolt hole 40s and the bolt shaft part 21.SELECTED DRAWING: Figure 2
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