| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pipe joint with no leakage of high pressure fluid through a pressure contact face even when attachment and detachment is performed a multiplicity of times. SOLUTION: A tip 27 of an enlarged seat part 25 of a pipe material 21 protrudes toward a radially inner side and an axially deeper side than a conical hole shaped seat face 31 of a nipple 22. A conical vertical angle of a truncated cone outer face 35 of the enlarged seat part 25 is smaller than a conical vertical angle of the conical hole shaped seat face 31 in a free state, and an annular gap 36 expansively opening radially outward is formed between the truncated cone outer face 35 and the conical hole shaped seat face 31 in a state before adherence of the pipe material 21 and the nipple 22. A hollow truncated cone shaped flange 26 is elastically deformable toward a radially inward side, and in a closely adhered state of the enlarged seat part 25 and the conical hole shaped seat face 31, the hollow truncated cone shaped flange 26 deforms toward the radially inward side, the annular gap 36 disappears, and the truncated cone outer face 35 conforms with the conical hole shaped seat face 35 in a surface contact state.</p> |
