Piping components

Abstract

To provide a piping component that offers excellent fire resistance, maintains strength while containing expandable graphite, and is easy to install. [Solution] The piping member (100) has a straight pipe (1) having an intermediate layer containing thermally expandable graphite, an outer layer made of a vinyl chloride resin covering the outside of the intermediate layer, and an inner layer made of a vinyl chloride resin covering the inside of the intermediate layer, a socket portion (2) with an enlarged diameter at one end of the straight pipe (1), a rubber ring arrangement portion (4) provided on the inner circumferential surface of the socket portion (2), and a rubber ring (3) arranged in the rubber ring arrangement portion (4), wherein the inner diameter of the socket portion (2) is 117% to 145% of the inner diameter of the straight pipe (1), and the intermediate layer contains thermally expandable graphite in a ratio of 1 to 20 parts by mass per 100 parts by mass of the vinyl chloride resin.

Claims

1. A straight pipe having an intermediate layer containing thermally expandable graphite, an outer layer made of a vinyl chloride resin covering the outside of the intermediate layer, and an inner layer made of a vinyl chloride resin covering the inside of the intermediate layer, The straight pipe has an enlarged socket at one end, The rubber ring arrangement portion provided on the inner circumferential surface of the receiving portion, The rubber rings arranged in the aforementioned rubber ring arrangement section, It has, The inner diameter of the socket portion is 117% or more and 145% or less of the inner diameter of the straight pipe. The intermediate layer contains the thermally expandable graphite in a ratio of 1 to 20 parts by mass per 100 parts by mass of the vinyl chloride resin. Piping components.

2. The piping member according to claim 1, wherein the rubber ring arrangement portion has an outer diameter greater than or equal to the outer diameter of the receiving portion, and the inner circumferential surface of the receiving portion has a circumferentially extending concave enlarged portion.

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