ISO 16486-3:2020 ガス燃料供給用のプラスチック配管システム—融着接合および機械接合を備えた非可塑化ポリアミド（PA-U）配管システム—パート3：継手 | ページ 6

3.1

electrofusion socket fitting

polyamide (PA-U) fitting which contains one or more integral heating elements that are capable of transforming electrical energy into heat to realize a fusion joint with a spigot end and/or a pipe

3.2

electrofusion saddle fitting

unplasticized polyamide (PA-U) fitting which contains one or more integral heating elements that are capable of transforming electrical energy into heat to realize fusion onto a pipe

3.3

tapping tee

electrofusion saddle fitting (3.2) (top loading or wraparound) which contains an integral cutter, used to cut through the wall of the main pipe, and holds the coupon inside the cutter

Note 1 to entry: The cutter remains in the body of the saddle after installation.

3.4

spigot end fitting

unplasticized polyamide (PA-U) fitting where the outside diameter of the spigot length is equal to the nominal outside diameter, d_n, of the corresponding pipe

3.5

transition fitting

factory made fitting that makes a transition joint between an unplasticized polyamide (PA-U) piping and a metallic pipe

Note 1 to entry: The metallic parts of the fitting may be assembled to metallic pipes by screw threads, compression joints, welded or flanged connections. The fitting can allow for either a dismountable or permanently assembled joint. In some cases, the supporting ring can also act as a grip ring.

3.6

voltage regulation

control of energy supplied, during the fusion process of an electrofusion fitting, by means of the voltage parameter

3.7

out-of-roundness

<pipe or fitting> difference between the measured maximum outside diameter and the measured minimum outside diameter in the same cross-sectional plane of a pipe or spigot end of a fitting

3.8

out-of-roundness

<socket> difference between the measured maximum inside diameter and the measured minimum inside diameter in the same cross-sectional plane of a socket