Pipe joint made of resin

Abstract

The present invention relates to a pipe joint made of resin used for laying pipes in which a high-purity liquid, ultra pure water, a medical liquid or the like flow treated in production process in various on a side of an inner periphery thereof kinds technical fields such as production of semiconductor, medical supplies and medicines, food process, and chemical industry. A joint body is provided with a receiving port, a cylindrical portion and an annular groove portion, and an inner ring inserted by a pushing ring is provided with a cylindrical projection, a projection of the inner ring is divided into a guiding portion having a guiding surface inclining in a state of widening toward the tip thereof, on a side of an inner periphery thereof and an effective length portion having no guiding surface, a relation of a groove width A of the annular groove portion, a thickness width B of the tip of the guiding portion of the projection, and a thickness C of the effective length portion of the projection is B<A<C. According to the present invention, a sealing surface pressure is generated to both axial and radial directions, thereby making it possible to keep an efficient sealing property for a long time, at the same time while it facilitates a control of a fastening torque of the pushing ring.

Dependencies are inferred from the claim text.